Non-stick material and preparation method therefor, non-stick layer, and cookware

Abstract

Provided are a non-stick material and a preparation method therefor, a non-stick layer, and cookware. The non-stick material is composed of microspheres formed by the accumulation of nanoscale wear-resistant particles; the microspheres have a pore structure; the microspheres having the pore structure are formed by spray-drying a mixed slurry comprising the nanoscale wear-resistant particles and a binder; and the wear-resistant particles comprise at least one of a metal oxide, a polymetallic cationic metallate, basalt, magnetite, and a binary amorphous alloy. According to the non-stick material of the present application, a cookware coating formed by the non-stick material can have excellent initial and long-lasting non-stick properties, excellent adhesion, and other superior performance characteristics.

Description

[0001] The present invention belongs to the technical field of non-stick materials, and particularly relates to a non-stick material and a manufacturing method thereof, a non-stick layer and a cookware. In the field of cookware, non-stick materials have always been a research hotspot. With the development of the non-stick industry, solid spraying materials mainly made of ceramics can reduce the psychological burden of customers using cookware products, because they do not need to use fluorocarbon coatings or ceramic coatings and the like organic liquid coatings. Moreover, because they are solid materials, they can avoid various problems caused by atomized spraying, and have broad development prospects and potential. Specifically, solid spraying materials mainly made of ceramics (for example, titanium oxide, titanium nitride, titanium carbide, magnetite, iron oxide, ferrous oxide, aluminum oxide, magnesium oxide and the like) can form a non-stick layer, namely so-called "non-coating non-stick technology". Here, non-coating is only to indicate that it does not use fluorocarbon coatings or ceramic coatings and the like organic coatings. However, although the coating formed by the above-mentioned ceramic materials is wear-resistant, the initial non-stick property of the cookware with the coating is poor, and cannot meet the requirements of the national standard for the initial non-stick property. Usually, it is necessary to add grease to form an oil film or use a material with good non-stick property (such as polysiloxane, fluorinated material) to modify it to improve its non-stick property. Because the oil film or the modified material is easy to be damaged, the long-term non-stick property of the cookware with the coating is generally poor. In addition, the bonding force of the cookware with the coating is poor, and it is usually necessary to use a metal blended with the above-mentioned ceramic to ensure the bonding force. Based on the deficiencies of the prior art, the present invention provides a non-stick material and a manufacturing method thereof, a non-stick layer and a cookware, to solve the problem that the cookware formed only by a coating of a conventional ceramic material cannot simultaneously have initial non-stick property, long-term non-stick property and bonding force and the like. According to an aspect of an exemplary embodiment, a non-stick material for cookware is provided, wherein the non-stick material is a microsphere with a pore structure, and the microsphere with the pore structure is formed by spray drying and sintering of a mixed slurry including a binder and nano-level wear-resistant particles, and the wear-resistant particles include at least one of a metal oxide, a multi-metal cationic metal salt, basalt, magnetite and a binary amorphous alloy.According to the non-stick material provided by the embodiments of the present application, the non-stick material is a microsphere with a pore structure, and the non-stick layer formed by the plurality of microspheres with the pore structure can retain the pore structure of the microspheres as much as possible, thereby forming a non-stick layer with a corresponding porous structure. The non-stick layer with the porous structure is easy to adsorb silicone oil, thereby being able to exert excellent non-stick performance due to the oil film non-stick principle. In addition, the wear-resistant particles have good wear resistance, thereby being able to protect the oil film to ensure the persistent non-stick performance of the cookware with the non-stick layer. Furthermore, the wear-resistant particles forming the non-stick material are small in size, i.e., at the nanometer level, and have a large specific surface area when the non-stick material is combined with the cookware body, thereby being able to ensure the bonding force between the non-stick material and the cookware body. In summary, the cookware coating formed by the non-stick material of the present application can simultaneously have excellent performance in terms of initial non-stick performance, persistent non-stick performance, and bonding force. In some embodiments, the porosity of the pore structure is 35%-50%, and the pore size is 10nm-lgm. The surfaces of the microspheres are slightly melted by spraying to accumulate and form the non-stick layer of the present application. The non-stick layer can retain the pore structure of the microspheres as much as possible, thereby forming a non-stick layer with a porous structure more complex than the pore structure. The non-stick layer with the porous structure is more easy to adsorb and lock silicone oil or oil fat than in the conventional case, is conducive to the filling and locking of silicone oil, and, under the protection of the wear-resistant particles with wear resistance, enables the silicone oil to be continuously and stably released to form an oil film, thereby being able to ensure the persistent non-stick performance of the non-stick layer. In some embodiments, the microspheres further include a carbonized product of a binder, the carbonized product of the binder is attached to part of the surface of the wear-resistant particles, and the weight ratio of the carbonized product of the binder to the wear-resistant particles in the microspheres is (0.5-1):98o. In these embodiments, the microspheres further include a small amount of the carbonized product of the binder. Since the carbonized product of the binder mainly consists of non-polar carbon elements and has a certain lipophilicity, the carbonized product of the binder can further improve the lipophilicity of the non-stick material as a whole, so that the non-stick layer formed by the non-stick material is more easy to fill silicone oil. In some embodiments, the metal oxide particles include at least one of a trivalent iron tetroxide particle, a titanium oxide particle, and a titanium suboxide particle.The metal oxides mentioned above have certain oil affinity and wear resistance, the microporous spray formed by the microparticles has a non-stick layer that can retain the microporous structure of the microparticles as much as possible, thereby forming a non-stick layer with a multi-porous structure, the silicone oil is easy to enter the multi-porous structure of the non-stick layer, and the metal oxide can act as a protective layer for the silicone oil, so that the silicone oil can continuously and stably release to form an oil film, thereby ensuring the long-term non-stickiness of the non-stick layer. In some embodiments, the particle size of the wear-resistant particles is 100-900 nm. A suitable particle size of the wear-resistant particles can provide a larger specific surface area, and the microparticles formed thereby will be helpful to improve the adhesion between the coating formed thereby and the body of the cookware due to the large specific surface area, and can form the required porous structure according to the present application. If the particle size of the wear-resistant particles is too small, the difficulty and cost of preparing the wear-resistant particles will be increased, and the microparticles cannot form a porous structure due to the too small particle size; and if the particle size of the wear-resistant particles is too large, the difficulty and cost of synthesizing the microparticles will be increased, and the microparticles cannot be synthesized due to the too large particle size, which affects the non-stick performance. In some embodiments, the contact parts of the wear-resistant particles in contact with each other are embedded in each other, so that the microparticles have a strong enough binding force between the particles to ensure that the internal particles of the microparticles do not separate or move too early during the formation of the coating, and only the surface layer can undergo a certain degree of micro-melting under certain conditions (such as heating), so that the porous structure of the non-stick material can be retained in the non-stick layer formed thereby. In some embodiments, the microparticles are spherical or spheroidal, which can be easily packed in a relatively compact non-stick layer through spherical close packing. In addition, the spherical or spheroidal microparticles have good fluidity, which can be more easily spread and distributed during the coating process, thereby being helpful to form a uniform and smooth non-stick layer due to the good fluidity, and improving the quality and performance of the coating. The non-stick material is a plurality of microparticles. The particle size is too small, and the original pore structure of the microsphere can not be preserved by thermal spraying because it is more likely to be completely melted. A larger particle size can provide better fluidity, but can increase the risk of clogging. According to a second aspect of the present application, a method for manufacturing a non-stick material is provided, wherein the method comprises: providing a mixed slurry comprising a binder and nano-sized wear-resistant particles; spray drying the mixed slurry to obtain spray-dried microspheres; and sintering the spray-dried microspheres at a preset temperature to form the non-stick material in the form of microspheres with a pore structure, wherein the wear-resistant particles comprise at least one of a metal oxide, a poly-metallic cationic metal salt, basalt, magnetite, and a binary amorphous alloy. According to the method for manufacturing a non-stick material provided in the embodiments of the present application, the mixed slurry of the binder and the nano-sized wear-resistant particles is subjected to spray drying, so that the non-stick material in the form of microspheres with a pore structure can be formed. The non-stick layer formed by the non-stick material can preserve the pore structure of the microspheres as much as possible, so as to form a non-stick layer with corresponding pores. The non-stick layer with corresponding pores is easy to adsorb silicone oil, so as to exhibit excellent non-stick performance due to the oil film non-stick principle. In addition, the wear-resistant particles have good wear resistance, so as to ensure the long-lasting non-stick performance of the cookware with the non-stick layer. Furthermore, the wear-resistant particles of the non-stick material are small in size, i.e., nano-sized, so as to have a large specific surface area when the non-stick material is combined with the cookware body, thereby ensuring the bonding force between the non-stick material and the cookware body. In summary, the cookware coating formed by the non-stick material of the present application can simultaneously have excellent performance in terms of initial non-stick performance, long-lasting non-stick performance, and bonding force. In some embodiments, the weight ratio of the wear-resistant particles to the binder is 98:(1-3). Within this ratio range, the carbonized product of the wear-resistant particles and the binder in the formed microspheres has an optimized non-stick performance and a compact structure. In some embodiments, the preset temperature is 500°C-650°C, and the sintering at the preset temperature comprises heating the spray-dried microspheres to the preset temperature at a heating rate of 15°C / min-20°C / min, and the holding time is 6h-8h, so as to carbonize the binder in the spray-dried microspheres as much as possible.Then, the temperature is raised to 1200-1250 °C at a temperature raising rate of 55-100 °C / min, and kept for 12-24 h, so that the wear-resistant particles in contact with each other are embedded into each other at the contact part after sintering to form the microspheres. In this process, the binder gradually volatilizes during sintering, and the volume of the wear-resistant particles shrinks to leave pores between the particles or inside the particles, and finally the microspheres with a certain pore structure are formed. According to the third aspect of the present application, a non-stick layer is provided, wherein the non-stick layer is formed by spraying the above-mentioned non-stick material. In some embodiments, the non-stick layer has a porous structure with a porosity of 50-70% and a pore size of 10-100 nm. In these embodiments, the pores of the porous structure with a high porosity can be filled with silicone oil or grease, and the filled silicone oil or grease can be continuously released during the use of the cookware, so that the cookware coating can easily exhibit non-stickness due to the continuous and stable oil film. Moreover, the microspheres forming the non-stick layer themselves have a certain hardness, which can effectively resist wear and high temperature during cooking and protect the silicone oil or grease, so as to improve the long-lasting non-stickness of the non-stick layer. In summary, the non-stick layer for cookware according to the present application can simultaneously have multiple excellent performances such as initial non-stickness and long-lasting non-stickness. According to the fourth aspect of the present application, a cookware is provided, wherein the cookware comprises a cookware body and a non-stick layer formed on the inner surface of the cookware body, and the non-stick layer is the above-mentioned non-stick layer. In some embodiments, the non-stick layer has a porous structure, and the porous structure is filled with silicone oil or grease to form an oil film layer on the surface of the non-stick layer. In these embodiments, the porous structure of the non-stick layer is filled with silicone oil or grease, which can optimize the initial non-stickness and improve the long-lasting non-stickness to some extent. In addition, when the filler is silicone oil, the porous structure can effectively reduce the conduction and diffusion of heat, reduce the possibility of decomposition of silicone oil due to high temperature, and improve the long-lasting non-stickness.FIG. la and FIG. lb show surface topography electron micrographs of the provided microspheres before sintering according to an example embodiment of the present application; FIG. 2a and FIG. 2b show surface topography electron micrographs of the provided microspheres after sintering according to an example embodiment of the present application; FIG. 3 shows a topography electron micrograph of the provided microspheres after sintering according to an example embodiment of the present application; FIG. 4 shows a structural schematic diagram of the provided microspheres according to an example embodiment of the present application; FIG. 5 shows a structural schematic diagram of a provided cookware according to an example embodiment of the present application; FIG. 6 shows an enlarged structural schematic diagram of I in FIG. 5; FIG. 7 shows a structural schematic diagram of a non-stick layer of another provided cookware according to an example embodiment of the present application. The present application will now be described more fully hereinafter with reference to the accompanying drawings, in which examples are shown. The present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout. Fluorine coating is a common liquid non-stick coating. However, the non-stick layer made of fluorine coating is extremely easy to be damaged by a spatula and is easy to age or decompose at high temperature during use. These problems have seriously affected the service life of the coating formed by fluorine coating. In addition, perfluorooctanoic acid (PFOA) is an indispensable raw material for synthetic fluorine coating, and as the industry gradually tends to be strict on perfluorooctanoic acid (PFOA), it is inevitable for fluorine coating to exit the stage of non-stick cookware. At present, no material with lower surface energy than fluorine coating has been found, but the demand for non-stick in the cookware industry always exists, and now the ceramic coating that can replace fluorine coating is hopeful. The ceramic coating is a liquid coating with silicone oil as the main non-stick component. Although the initial non-stickness of the coating formed by the ceramic coating can be close to that of fluorine coating, the silicone oil will be continuously consumed at high temperature and quickly lose the non-stick effect as high-temperature cooking proceeds, so the ceramic coating has poor long-lasting non-stickness.With the development of the non-stick industry, solid spraying materials mainly using ceramics (e.g., titanium oxide, titanium nitride, titanium carbide, magnetite, iron oxide, ferrous oxide, aluminum oxide, magnesium oxide, and the like) have gradually appeared, which can form a non-stick layer, i.e., so-called "coating-free non-stick technology". Here, coating-free is only to indicate that it does not use fluorine coating or ceramic coating and the like organic coating. However, although the coating formed by the above-mentioned ceramic material is wear-resistant, the cookware with the coating only has the effect of cooking non-stick in the state of having oil, and its initial non-stick property is poor, and usually needs to be modified by a material with good non-stick property, such as polysiloxane and fluorinated material, to meet the initial non-stick property required by the national standard. Moreover, the non-stick property of such material decreases quickly after wear, and the remaining polysiloxane has a reverse effect on the non-stick property, which is worse than before modification. In addition, the cookware with the coating has poor bonding force, and usually needs to use a method of blending metal with the above-mentioned ceramic to ensure the bonding force, and the long-term non-stick property is generally poor. In view of the above, how to balance the performance of the cookware coating in terms of initial non-stick property, long-term non-stick property, bonding force and the like is a challenge currently faced by the field. Therefore, the present application provides a non-stick material for cookware, wherein the non-stick material is a plurality of microspheres with a pore structure, and the microspheres with a pore structure are formed by spray drying and sintering of a mixed slurry including a binder and wear-resistant particles at the nanometer level. According to the present application, by controlling the spraying process, the non-stick layer formed by the plurality of microspheres with a pore structure can possibly retain the pore structure of the microspheres, thereby forming a non-stick layer with a multi-pore structure corresponding to and more complex than the pore structure, and the non-stick layer with a multi-pore structure is easy to adsorb silicone oil, thereby being able to exert excellent non-stick performance according to the oil film non-stick principle. In addition, the wear-resistant particles have good wear resistance, and can act as a protective body for silicone oil, thereby being able to ensure the long-term non-stick performance of the cookware with the non-stick layer. Furthermore, the wear-resistant particles for forming the non-stick material are small in size, at the nanometer level, and when the non-stick material is combined with the cookware body, have a large specific surface area, thereby being able to ensure the bonding force between the non-stick material and the cookware body.In addition to the above, since the wear-resistant particles forming the non-stick material are in nanometer level, even if the spraying parameters are lower than those of conventional ceramic materials, the microspheres can still ensure that the surface is easy to be micro-fused and deposited on the cookware body during the spraying process, so as to ensure the deposition efficiency of the material. It can be understood that the spraying power of the microspheres according to the present application can be set relatively low, and the pore structure in the microspheres can be better preserved. In addition, the microspheres are solid materials, and do not need to be atomized and sprayed to form a non-stick layer, which can avoid the environmental pollution problem caused by atomized spraying of liquid coating. In summary, the cookware coating formed by the non-stick material according to the present application can simultaneously have excellent performance in initial non-stickness, persistent non-stickness, and bonding force. According to the present application, the wear-resistant particles are oleophilic wear-resistant particles or oleophilic ceramic materials, and the non-stick layer formed by the oleophilic wear-resistant particles can help effective adsorption and stable storage of silicone oil based on the principle of similarity and compatibility, so that the coating can easily exhibit non-stickness due to the persistent and stable oil film. In some embodiments, the wear-resistant particles include at least one of a multi-metal cationic metal salt, basalt, magnetite, and a binary amorphous alloy. As an example, the multi-metal cationic metal salt has an amorphous structure, and the multi-metal cations in the multi-metal cationic metal salt include at least two metal cations. Among them, the metal cations include at least one of magnesium ions, aluminum ions, calcium ions, selenium ions, titanium ions, manganese ions, iron ions, chromium ions, cobalt ions, copper ions, zinc ions, nickel ions, silver ions, gold ions, platinum ions, tin ions, lead ions, bismuth ions, indium ions, thallium ions, gallium ions, germanium ions, arsenic ions, antimony ions, and iodine ions. In terms of acid radical ions, the multi-metal cationic metal salt includes at least one of a multi-metal cationic titanium salt, a multi-metal cationic manganese salt, a multi-metal cationic chromium salt, a multi-metal cationic iron salt, a multi-metal cationic metavanadic acid salt, a multi-metal cationic manganic acid salt, and a multi-metal cationic ferric acid salt. It can be obtained by melting at least two metal cationic metal salt powders to obtain a corresponding molten liquid, and then treating the molten liquid by atomization powdering. According to the present application, the basalt and the magnetite are materials obtained by crushing natural ores. As an example, the natural ores can be subjected to certain impurity removal treatment.For example, basalt, first, can be a natural basalt primary crushing. Specifically, the original large pieces of basalt using a broken machine into a diameter of lcm-5cm small pieces. Then, beneficiation purification, based on the appearance of the primary crushing after the basalt on the basis of the removal of visible impurities containing basalt. Next, coarse grinding, using Raymond grinding mill after beneficiation of basalt grinding, so that it forms a diameter of 0.1mm-lmm powder. After that, the heavy impurities, using the method of further purification of basalt powder, to remove as much as possible the basalt powder in the soil and other impurities. Finally, fine grinding, using the medium speed micro powder mill for heavy impurities of basalt powder after the more detailed processing, so that the powder to micron level, for example, 75(im-150|im, converted to mesh is 100 mesh -150 mesh. Thus, by subsequent crushing and grinding method, screening of the application of nanometer level basalt particles. According to the present application, binary amorphous alloy includes two main elements and optional impurity elements, two main elements are independently selected from one of Mg, Al, Ca, Se, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Tc, In, Sn, Sb, Hf, Ta and W, impurity elements are selected from at least one of Mg, Al, Ca, Se, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Nb, Mo, Tc, In, Sn, Sb, Hf, Ta, W, C, N, 0, B, S, Si and P, and two main elements and impurity elements are different from each other. As an example, in the binary amorphous alloy, the sum of the atomic percentage of two main elements is greater than 90%, wherein any one of the main elements atomic percentage is not less than 10%. As an example, the binary amorphous alloy includes FeGoYsoInzBsPqSi, FeqsTisoSizMna, FezoZrzoTiiAbCQa, CiUoZnsoGasYzS, Cu4()Zn55GaiY2Sn2, Ti^ARCtiiMoiSiiBi and I^oZ^ZniMi^CiNi, wherein the subscript number represents the mass fraction.In some embodiments, the metal oxide particles include at least one of magnetite particles, titanium oxide particles, and titanium suboxide particles. In preferred embodiments, the metal oxide particles are magnetite particles and titanium suboxide particles, which can have relatively superior non-stick properties. In the present application, titanium oxide particles refer to TiC)2particles, and titanium suboxide includes Ti2O3, Ti3O4, and Ti4O7, specifically, titanium suboxide includes 60-80% Ti2O3, and the balance of Ti3O4and Ti4O7. It should be noted that the present application does not make excessive limitations on Ti2O3and Ti3O4, because the proportion range has little effect on the overall performance of the material. The above-mentioned wear-resistant particles have certain lipophilicity and wear resistance, the microsphere spray formed by the microspheres with pore structure can retain the pore structure of the microspheres as much as possible, thereby forming a non-stick layer with a multi-pore structure, silicone oil is easy to enter the multi-pore structure of the non-stick layer, and the metal oxide can act as a protective layer for the silicone oil, so that the silicone oil can continuously and stably release to form an oil film, thereby ensuring the long-term non-stick property of the non-stick layer. In some embodiments, the wear-resistant particles are nanoscale, for example, the particle size of the wear-resistant particles is 100-900 nm. oThe particle size of the suitable wear-resistant particles can provide a larger specific surface area, and the microspheres formed therefrom can help to improve the adhesion between the coating formed therefrom and the body of the cookware due to the larger specific surface area, and can form the desired pore structure. If the particle size of the wear-resistant particles is too small (e.g., less than 100 nm), the difficulty and cost of preparing the wear-resistant particles can be increased, and the pore structure microspheres cannot be formed due to the too small particle size. If the particle size of the wear-resistant particles is too large (e.g., greater than 900 nm), the difficulty and cost of artificially synthesizing the microspheres can be increased, and the pore structure microspheres cannot be synthesized due to the too large particle size, which can affect the non-stick performance. The wear-resistant particles are spherical or spheroidal, and the pore structure microspheres formed therefrom can have a relatively uniform pore distribution and a high open porosity, which is not only beneficial to the adsorption and storage of silicone oil, but also ensures the mechanical strength and wear resistance of the formed microspheres. According to the present application, the microspheres have a special pore structure, and in some embodiments, the porosity of the pore structure of the microspheres is 35%-50%, and the size of a single pore is 10 nm-1 gmo. In these embodiments, if the porosity of the microspheres is too high, the structure of the formed microspheres or non-stick layer can be too loose, which can affect the mechanical strength and durability. If the porosity of the microspheres is too low, it can be insufficient to accommodate a sufficient amount of silicone oil. In addition, the pore size affects the filling of silicone oil. If the pore size is too small, the silicone oil can not be able to enter. If the pore size is too large, although it is easy to fill, it can cause the silicone oil to be easily lost, which can affect the long-term performance. Therefore, the microspheres having the pore structure with the above porosity and pore size, as the non-stick material, can form the non-stick layer of the present application by spraying to slightly melt the surface of each microsphere to accumulate. The non-stick layer can retain the pore structure of the microspheres as much as possible, thereby forming a non-stick layer having a more complex porous structure than the pore structure. The non-stick layer having the porous structure is relatively easy to adsorb and lock silicone oil or grease compared to the conventional case, which is beneficial to the filling and locking of the silicone oil, and under the protection of the wear-resistant particles, the silicone oil can be continuously and stably released to form an oil film, thereby ensuring the long-term non-stick performance of the non-stick layer. According to the present application, the microspheres having the pore structure are formed by spray drying and sintering of a mixed slurry including a binder and nano-sized wear-resistant particles.In the process of sintering the microspheres after spray drying, the solvent in the mixed slurry is gradually carbonized, and finally a microsphere structure of nano-level abrasion-resistant particle stacking is formed. In some embodiments, the microspheres include abrasion-resistant particles and also include carbonized products of the binder, which are attached to part of the surface of the abrasion-resistant particles. As an example, in the microspheres, the weight ratio of the carbonized products of the binder to the abrasion-resistant particles is (0.5-1): 98o In these embodiments, a small amount of carbonized products of the binder is also included in the microspheres, and since the carbonized products of the binder are mainly composed of non-polar carbon elements and have a certain lipophilicity, the lipophilicity of the entire non-stick material can be further improved, so that the non-stick layer formed therefrom is more easily filled with silicone oil. According to the present application, after the microspheres after spray drying are sintered at a predetermined temperature, the contact surfaces of adjacent abrasion-resistant particles have become an integral whole after high-temperature melting and diffusion, and their combination is similar to the combination between atoms inside the particles, which is through chemical bonds, rather than physical adhesion. In some embodiments, the adjacent abrasion-resistant particles are combined by chemical bonds (ionic bonds and covalent bonds), so that the particles in the microspheres have a strong enough binding force to ensure that the internal particles of the microspheres do not separate or move prematurely during the formation of the coating layer, and only the surface layer can undergo a certain degree of micro-melting under certain conditions (such as heating), so that the pore structure of the microspheres of the non-stick material can be more retained in the non-stick layer formed therefrom. As an example, the binding force between adjacent abrasion-resistant particles is in the range of 80MPa-200MPa. According to the present application, the non-stick material is a plurality of microspheres, which are spherical or spheroidal, and can easily form a relatively compact non-stick layer through spherical close packing. In addition, the spherical or spheroidal microspheres have good fluidity, which can be more easily spread and distributed during the coating process, thereby helping to form a uniform and smooth non-stick layer due to good fluidity, improving the quality and performance of the coating. The particle size of the non-stick material is 15(im-45|im, a smaller particle size has a larger specific surface area, which is beneficial to the binding force, but it may be too small in particle size to completely melt and retain the original pore structure of the microspheres through thermal spraying, while a larger particle size may provide better fluidity, but it is easy to increase the risk of blockage.According to a second aspect of the present application, a method for manufacturing a non-stick material is provided, wherein the method for manufacturing the non-stick material comprises: Step S1, providing a mixed slurry comprising a binder and nano-sized wear-resistant particles. Step S2, performing spray drying on the mixed slurry to form a non-stick material having a porous structure and being in a microspherical shape. According to the method for manufacturing the non-stick material provided by the present application, the mixed slurry of the binder and the nano-sized wear-resistant particles is subjected to spray drying, so that the non-stick material having the porous structure and being in the microspherical shape can be formed. The non-stick layer formed by the non-stick material can retain the porous structure of the microspheres as much as possible, so that the non-stick layer having the corresponding pores is formed. The non-stick layer having the corresponding pores is easy to adsorb silicone oil, so that the non-stick performance can be exerted due to the oil film non-stick principle. In addition, the wear-resistant particles have good wear resistance, and can act as a protector of the silicone oil, so that the long-term non-stick performance of the cookware having the non-stick layer can be ensured. Furthermore, the wear-resistant particles of the non-stick material are small in size, i.e., nano-sized, so that a large specific surface area is provided when the non-stick material is combined with the cookware body, so that the bonding force between the non-stick material and the cookware body can be ensured. In summary, the cookware coating formed by the non-stick material of the present application can simultaneously have excellent performance in terms of initial non-stick performance, long-term non-stick performance and bonding force. Hereinafter, the method for manufacturing the non-stick material according to the present application will be described in detail. The wear-resistant particles according to the present application are the wear-resistant particles provided in the above exemplary embodiments, which can form microspheres having the desired porous structure (porous structure) through spray drying (powder granulation). The coating formed by the non-stick material using the plurality of microspheres can ensure that the silicone oil is easy to enter, and the wear-resistant particles in the microspheres can effectively protect the silicone oil located in the interior from being directly contacted with the heat source and volatilized. In addition, the microspheres can effectively reduce the conduction and diffusion of heat, reduce the possibility of direct contact of the silicone oil with high temperature, so as to improve the stability and safety of the non-stick material. According to the present application, the wear-resistant particles include at least one of metal oxide particles, multi-metal cation metal salt particles, basalt, magnetite and binary amorphous alloy. The metal oxide particles include magnetite tetroxide particles, titanium oxide particles or titanium suboxide particles.Wherein, it needs to be noted that the titanium oxide particles refer to TiC)2particles, the titanium suboxide includes E2O3, E3O4or E4O7particles, and the corresponding metal oxide coating is a three iron tetroxide layer, a titanium oxide layer or a titanium suboxide layer. The multi-metallic cationic metal salt, basalt and magnetite belong to ceramic powder, and the binary amorphous alloy belongs to metal powder. It needs to be noted that if the wear-resistant particles are the ceramic powder of the multi-metallic cationic metal salt, basalt and magnetite, they can be mixed in any proportion. If the wear-resistant particles are the mixture of the ceramic powder and the metal powder (binary amorphous alloy), the addition amount of the metal powder needs to be limited. For example, the ratio of the ceramic powder to the metal powder is 5:1-10:1, because the melting point of the metal powder is lower than that of the ceramic powder, and the thermal conductivity of the metal powder is higher than that of the ceramic powder. If the proportion of the metal powder is too high, the metal powder is easy to melt in the process of plasma spraying, so that the pore structure of the microspheres itself is damaged in the process of preparing the coating. In this case, if the metal powder is not completely melted by controlling the plasma spraying process parameters, the energy received by the ceramic powder will not be enough, and the strength of the non-adhesive layer cannot be effectively deposited and damaged. In some embodiments, the wear-resistant particles are spherical or spheroidal, so that the microspheres with pore structure formed thereby have relatively uniform pore distribution and high through-hole porosity, which is not only beneficial to the adsorption and storage of silicone oil, but also can ensure the mechanical strength and wear resistance of the formed microspheres.In some embodiments, nanoscale wear-resistant particles can be obtained by a grinding and milling method, specifically, micron-sized (e.g., 1-5 microns) powder raw materials are added into a feed tank with water as a medium, then a slurry is prepared after adding a surfactant (fatty acid alkanolamide, sulfosalicylic acid, fatty alcohol polyoxyethylene ether, etc.), and grinding balls (grinding ball material is oxidized carat, grinding ball diameter is 7mm:5mm:3mm:2mm=2:3:4:5), the mass ratio of water, raw material powder, grinding medium, and surfactant is (80-120):(15-25):(50-100):(1-3), an ultrasonic crusher is started, the frequency is 20-30 KHz, the power is 1.5-3.5 KW, an ultrasonic transducer drives a stirring rod, the stirring rod drives the grinding medium to rotate, and the micron-sized raw material powder is crushed to nanoscale 100-900 nm by extrusion, shearing, impact, and other effects generated by the mutual collision of the grinding medium, and the grinding time is 16-24 hours. In some embodiments, nanoscale ferroferric oxide particles can be obtained commercially or by reacting ferric chloride and ferrous chloride. As some examples, ferroferric oxide nanoparticles are prepared using a coprecipitation method, specifically, including the following steps: Step 1, ferric chloride and ferrous chloride are weighed according to a molar ratio of 2:1, water is added to fully dissolve them to prepare a mixed solution, a small amount of dilute hydrochloric acid is added to make the pH value of the solution acidic, such as less than 50, Step 2, heating is performed to maintain a temperature of 50-80°C, sodium hydroxide solution or ammonia water is slowly added to make the pH value of the system greater than 10, and constant stirring is performed until black ferroferric oxide is precipitated. Step 3, filtration, ethanol washing, and drying are performed to obtain nanoscale ferroferric oxide particles. In some embodiments, nanoscale titanium oxide particles can be obtained commercially or by chemical reaction. As other examples, nanoscale titanium oxide particles are prepared using a homogeneous precipitation method.Specifically, the method includes the following steps: Step 1, a mixed solution of titanyl sulfate and urea is configured in a molar ratio of 1:1-1:2, and water is added to form a mixed solution with a concentration of 1-3 mol / L, and the mixed solution is placed in a high-pressure reaction kettle for reaction, the reaction time is 1-3 h, and the temperature is 100-120°C; Step 2, the reaction product is filtered and washed to remove impurities, and then vacuum dried to obtain metatitanic acid precipitate; Step 3, finally, the metatitanic acid precipitate is placed in a high-temperature furnace for sintering, the sintering temperature is 700-900°C, and the time is 1-3 h, so that the nano-sized titanium oxide particles are obtained. In addition, the nano-sized titanium suboxide particles can be obtained by market purchase or high-temperature sintering of the nano-sized titanium oxide particles. In some embodiments, the particle size of the wear-resistant particles is 100-900 nm. When the particle size of the wear-resistant particles is in the range of 100-900 nm, it is easier to form the above-mentioned microspheres with the expected structure, and the porosity of the structure of the formed microspheres can meet the requirements of locking silicone oil. The particle size of the above-mentioned material can be the maximum length of each particle, rather than specifically limiting the material to have a spherical or spherical-like shape. For example, but not limited to, when the material has an elliptical shape, the particle size of the material can refer to the length of the major axis. According to the present application, the step of forming the mixed slurry includes providing wear-resistant particles, a binder, ball-milling the wear-resistant particles and the binder to form a mixed slurry. Specifically, the wear-resistant particles and the binder are added to a ball mill tank, and deionized water is added as a grinding medium, and grinding is performed for 4-8 h, so that a uniformly dispersed mixed slurry including wear-resistant particles and a binder is obtained. The binder in the mixed slurry can enhance the bonding force between the particles forming the microspheres, to form a stable particle stack, so that the microspheres have a certain mechanical strength, to ensure the stability of the non-stick layer formed subsequently, and avoid breaking and affecting the formation of the porous structure. In some embodiments, the mixed slurry includes wear-resistant particles and a binder, and the weight ratio of the wear-resistant particles to the binder is 98:(1-3). As an example, the binder includes an alcohol-based binder and a cellulose-based binder, and as an example, the binder can include at least one of a cellulose-based binder and an alcohol-based binder.The cellulose-based binder can include at least one of a hydroxymethyl cellulose-based binder, a hydroxyethyl cellulose-based binder, and a hydroxypropyl cellulose-based binder. The alcohol-based binder can include at least one of a polyethylene glycol, a polyvinyl alcohol-based binder, a polypropylene alcohol-based binder, and other higher alcohol-based binders having six or more carbon atoms. However, the present application is not limited thereto, but can select a suitable binder according to actual needs. It is to be noted that, according to the present application, the binder is volatilized or carbonized in the subsequent sintering process, and whether it is volatilized or carbonized depends greatly on the heating rate, sintering temperature, and time of the subsequent sintering stage. Here, carbonization is a process in which, under high temperature, an organic substance removes hydrogen, oxygen, etc. other than carbon as a low molecular compound through thermal decomposition, and only the remaining carbon is obtained. Volatilization is a process in which an organic substance changes from a liquid state to a gaseous state after reaching a boiling point. According to the present application, under an inert atmosphere such as nitrogen or oxygen, with a fast heating rate, a high sintering temperature, and a long sintering time, a small portion of the binder is volatilized, leaving a pore, and most of the binder is carbonized, forming a high-carbon-content material, a carbonized product of the binder, and adjacent particles interact with each other to form a microsphere having a stack of oxide particles and a carbonized product and a pore structure. As an example, the carbonization temperature of the binder of the present application is generally between 250°C and 500°C, and most of the binder forms a carbonized product under the influence of the subsequent sintering temperature and time. Since the carbonized product of the binder is mainly composed of non-polar carbon elements, it has a certain lipophilicity, and the non-stick layer of the cookware formed by such a microsphere is more easily filled with silicone oil. In some embodiments, 10% of the binder is volatilized, and 90% of the binder is carbonized. Spray drying to form a wet microsphere After the slurry is prepared, the mixed slurry is spray dried. According to some embodiments of the present application, a spray drying device (such as a pressure spray dryer, a centrifugal spray dryer, etc.) is used to atomize the mixed slurry into fine droplets. The atomized droplets are in contact with hot air, and the solvent (moisture) evaporates rapidly, and the inter-particle structure of the wear-resistant particles and the binder forms a microsphere. As an example, the mixed slurry can be fed onto a high-speed spinning atomization disc to form droplets, and then the droplets are blown into a drying tower using hot air, the droplets are temporarily stopped during the descent, and finally a wet microsphere is formed.According to the present application, the process parameters of spray drying (e.g., atomization disk rotation speed and hot air temperature) can be adjusted to control the particle size, pore size and distribution, and other properties of the microspheres. As an example, the mixed slurry can be dispersed into extremely small droplets by controlling the rotation speed of the atomization disk during the high-speed movement of the atomization disk. In some embodiments, the rotation speed of the atomization disk can be controlled in the range of 4000 rpm - 15000 rpm, preferably, in the range of 6000 rpm - 12000 rpm. According to some embodiments of the present application, the temperature of the hot air can be controlled in the range of 60°C - 100°C, the temperature of the drying tower can be controlled in the range of 100°C - 400°C, and the short residence time of the droplets in the drying tower can be controlled to be in the range of 5 seconds - 15 seconds. The relatively low temperature of the hot air can reduce the loss of the binder, so that sufficient binder is retained in the obtained pre-formed wet microspheres, thereby ensuring that the microspheres with pore structure can be formed by the volatilization or carbonization of the binder during the subsequent sintering process. The wet microspheres obtained after spray drying are sintered according to the method of manufacturing microspheres of the present application. During the sintering process, the contacting wear-resistant particles are embedded into each other at the sintered contact part to form the microspheres, so that the microspheres have sufficient inter-particle bonding strength to ensure the stability of the microspheres in subsequent processes. According to some embodiments of the present application, the microspheres after spray drying can be heated to a temperature above the carbonization temperature at a high heating rate in an inert atmosphere such as nitrogen, oxygen, etc., and maintained for a long time, so that as much binder as possible is carbonized during this process. As an example, the microspheres are placed in a sintering furnace in an inert atmosphere such as nitrogen, oxygen, etc., the initial sintering temperature is 20°C - 30°C, the heating rate is 15°C / min - 20°C / min, the high heating rate can avoid excessive volatilization of the binder, the temperature is increased to 500°C - 650°C at a heating rate of 15°C / min - 20°C / min, and the temperature is maintained for 6h - 8h, so that the binder in the microspheres after spray drying is carbonized as much as possible.Then, the temperature is raised to 1200°C-1250°C at a temperature raising rate of 55°C / min-100°C / min, and then, the temperature is kept for 12h-24h, so that the mutual interaction between the adjacent wear-resistant particles causes the mutual embedding at the contact part, the volume shrinkage, to leave the pores between the particles, and finally, the microspheres of the carbonized product of the wear-resistant particles and the binder are formed. As an example, in the microspheres, the weight ratio of the carbonized product of the binder and the wear-resistant particles is (0.5-1):98, so the carbonized product of the binder and the wear-resistant particles in the non-stick layer formed thereby are attached to part of the surface of the wear-resistant particles. Continuing the above example, in the non-stick layer, the weight ratio of the carbonized product of the binder and the wear-resistant particles is (0.5-1):98, in these examples, the microspheres also have a small amount of the carbonized product of the binder, since the carbonized product of the binder is mainly composed of non-polar carbon elements, has a certain lipophilicity, and thus can further improve the lipophilicity of the microspheres as a whole, so that the non-stick layer formed thereby is easier to fill with silicone oil. In addition, in the process of sintering, when the metal oxide particles are titanium oxide, the titanium oxide will be deoxidized under the influence of the reducing atmosphere and high temperature of the solid-phase sintering to form at least partially titanium suboxide, and the special chemical properties and surface structure of the titanium suboxide help to reduce the contact between the food and the surface of the cookware and the possibility of food sticking. FIG. la and FIG. lb show the surface morphology electron micrographs of the microspheres provided according to the exemplary embodiments of the present application before sintering. FIG. 2a and FIG. lb show the surface morphology electron micrographs of the microspheres provided according to the exemplary embodiments of the present application after sintering. Referring to FIG. 1 and FIG. 2, it can be seen that before sintering, the wet microspheres do not have obvious pores, and after sintering, the microspheres have obvious pore structures, and the pores of the pore structure are generally uniformly distributed. FIG. 3 shows the morphology electron micrograph of the microspheres provided according to the exemplary embodiments of the present application after sintering. As a whole, the pore structure of the microspheres after sintering can be seen. FIG. 4 shows a structural schematic diagram of the microspheres provided according to the exemplary embodiments of the present application.As shown in FIG. 4, the microspheres 10 include the abrasive particles 11 and the carbonized product 12o of the binder attached to part of the surface of the abrasive particles 11. According to the method of manufacturing the non-stick material of the present application, the sintered microspheres can also be sieved after the sintering step, thereby obtaining microspheres in different particle size ranges. The microsphere powder in different particle size ranges can be sieved as needed for application in different products. For example, the sintered powder is sieved by a vibrating screen to obtain microspheres with a particle size of 10. g m-45 gThe microspheres of the present application are spherical or spheroidal. According to the method of the present application for forming the non-stick material, the final microsphere particles are not only one particle in the sense of quantity, but can be a plurality of particles aggregated together. The particle size of the final microsphere particles is not less than the particle size of the original various powders. According to the present application, the inside of the microsphere particles or the inter-particle channels after spray drying can allow the passage of gas or liquid, i.e. the pore structure of the microspheres formed by spray drying is mainly open pores or connected pores, i.e. through holes, and a small number of closed pores. As an example, the volume percentage of the through holes is about 80%-90%, and the balance is closed pores. According to the third aspect of the present application, a non-stick layer is provided, wherein the non-stick layer is formed by spraying the non-stick material described above. In the embodiment of the present application, the wear-resistant particles themselves do not have pores, and the mixed slurry including the wear-resistant particles is sprayed to form microspheres with a pore structure. When the microspheres are sprayed as non-stick material, the microspheres are only partially fused on the surface, so that the microspheres are stacked on the substrate to form a non-stick layer. The non-stick layer can retain the pore structure of the microspheres as much as possible, thereby forming a non-stick layer with a porous structure. The pores of the non-stick layer with a porous structure match the silicone molecules, are easy to adsorb silicone, and can lock the silicone with a certain adhesion, so that the silicone can be released slowly, thereby being able to play excellent non-stick performance based on the oil film non-stick principle. In addition, the wear-resistant particles that form the non-stick material are small, at the nanometer level, and have a large specific surface area when combined with the cookware body, thereby being able to ensure the bonding strength between the wear-resistant particles and the cookware body. The wear-resistant particles have good wear resistance and can act as a protective body for the silicone, thereby being able to ensure that the cookware with the non-stick layer has a continuous and stable oil film and ensures long-lasting non-stick performance. According to the present application, the non-stick layer can be formed by thermal spraying of the non-stick material, wherein the non-stick material is a microsphere with a pore structure. In the process of thermal spraying, the surface of the microsphere is heated, the inside is almost unchanged, and the whole non-stick layer is formed on the cookware body, so that the non-stick layer formed can basically maintain the pore structure of the microsphere. It can be understood that the porous structure of the non-stick layer is determined to a great extent by the pore structure of the microsphere.As an example, in the formed non-stick layer, the porous structure has a porosity of 50%-70%, and the pore size is 10nm-10gmo More specifically, the porous structure includes a plurality of large pores between the microspheres and a plurality of small pores inside the microspheres, the size of the large pores is 500nm-10|im, the size of the small pores is 10nm-l|im, the large pores can make the silicone oil or grease easily enter the non-stick layer, and the small pores can make the silicone oil or grease easy to maintain, so as to ensure the non-stick performance of the cookware with the non-stick layer due to the stable release of the oil film. In some embodiments, thermal spraying includes flame spraying, arc spraying, and plasma spraying. Taking plasma spraying as an example, the specific parameters are: powder feeding speed 10g / min-25g / min, spraying distance 100mm- 13 Omm, arc current 300A-550A, hydrogen pressure 0.6MPa-0.8MPa, hydrogen flow 100L / h-200L / h, oxygen pressure 1.0MPa-1.5MPa, oxygen flow 1500L / h-2500L / h. According to the present application, the thickness of the non-stick layer is in the range of 30 microns-60 microns, which can ensure the long-lasting non-stick performance of the cookware with the non-stick layer. According to the fourth aspect of the present application, a cookware is provided, as shown in FIG. 5, the cookware includes a cookware body 100 and a non-stick layer 200 formed on the inner surface of the cookware body 100, wherein the non-stick layer is formed by spraying the non-stick material described above. In some embodiments, the non-stick layer has a porous structure that can be filled with silicone oil. In these embodiments, the porous structure of the non-stick layer is a structure suitable for silicone oil filling and locking, and when the porous structure of the non-stick layer is filled with silicone oil, the silicone oil can be slowly released from the porous structure to optimize the non-stick performance of the non-stick layer. According to the present application, the cookware coating can have various structural forms. In some embodiments, the non-stick layer is formed on the inner surface of the cookware body, wherein the inner surface of the cookware body is a rough surface, which can be obtained by sanding the inner surface of the cookware body.As shown in FIG. 6, the inner surface of the cookware body is a rough surface, and the non-stick layer is formed on the cookware body with the rough surface. The surface of the non-stick layer can have a concave-convex structure, for example, the concave-convex structure is micron-level, which is composed of multiple convex hulls, the height of the convex hull is 100|im-500|im, the width is 200(im-400|im, and the distance between adjacent convex hulls is 200gm-400gmo. The non-stick layer at the valley position between adjacent convex hulls is not easy to be damaged by the spatula, so as to improve the non-stick life. In other embodiments, a rough transition layer is provided between the cookware body and the non-stick layer, which can further improve the bonding force between the coating and the cookware body. For example, the rough transition layer can be formed by thermal spraying of a metal material on the surface of the cookware body. In yet other embodiments, the inner surface of the cookware body is formed with a plurality of spaced-apart ribs, and the non-stick layer is formed in the gaps between adjacent ribs and has a thickness not less than the upper end of the ribs. The ribs can be prepared on the surface of the cookware body by existing methods, for example, by mechanical, laser, chemical, electrochemical, etc. As shown in FIG. 7, the cross-section of the rib is circular or annular, and the non-stick layer is formed in the gap between adjacent ribs and has a thickness flush with the upper end of the rib. In these embodiments, the non-stick layer is protected by the ribs to avoid wear and tear, and the filled silicone or oil in the non-stick layer can form a stable and durable oil film during use, which can further improve the durable non-stick property of the cookware coating. According to the present application, the non-stick material is black, which can be exhibited by the components in basalt or ferriferrous oxide, black titanium oxide, etc. The black non-stick material does not cause color change after spraying, so that a black non-stick layer can be formed. On the one hand, the black non-stick layer can weaken the contrast of the black discoloration during use, improving the visual experience of the user; on the other hand, the non-stick material has properties similar to ceramic materials, so it has the brittleness of ceramic materials, resulting in a coating formed by the non-stick material being more brittle than a coating formed by a metal material, which is easy to be polished during use, thereby ensuring the cleanliness of the cookware during use.In the following, the manufacturing method of the cookware according to the present application will be described with specific examples. The cookware body can be made of a commonly used material according to the present application. For example, the material can be stainless steel, titanium, aluminum, titanium alloy, aluminum alloy, and a composite material formed of the above materials. The cookware body can have a shape corresponding to a function, for example, when the non-stick cookware is a non-stick pan, the cookware body can have a conventional pan shape. In some examples, the inner surface of the cookware body is a rough surface, which can be obtained by performing sanding on the inner surface of the cookware body, for example, the roughness of the rough surface is in the range of 3-6 microns in Ra value. In other examples, a rough transition layer is provided between the cookware body and the non-stick layer, which can further improve the adhesion between the coating and the cookware body. For example, the rough transition layer can be formed by thermal spraying of a metal material on the surface of the cookware body. The non-stick layer can be formed by the above-mentioned thermal spraying method by a non-stick material according to the present application. According to the present application, in order to further optimize the non-stick, the factory can be filled with silicone oil or oil, so that the non-stick performance of the non-stick layer can be further optimized, and in the subsequent use process, the oil in the cooking process can also be supplemented in the porous structure to form a continuous and stable oil film to play the non-stick performance. In the following, an example of filling silicone oil will be described according to an aspect of the present application. The silicone oil can be selected from at least one of methyl silicone oil, dimethyl silicone oil, hydroxyl silicone oil, hydrogen-containing silicone oil and polyurethane modified silicone oil according to the present application. The above silicone oil has a specific viscosity and surface tension, which is easier to enter the pore structure of the microsphere. In this case, the silicone oil is adsorbed or bonded in the pore structure of the microsphere. In addition, the silicone oil includes 20-30% low molecular weight silicone oil, 40-60% medium molecular weight silicone oil, and 20-30% high molecular weight silicone oil by weight percentage, wherein the molecular weight of the low molecular weight silicone oil is between 500-1000, the molecular weight of the medium molecular weight silicone oil is between 3000-6000, and the molecular weight of the high molecular weight silicone oil is between 12000-30000.In these embodiments, the combination of the structure formed by the accumulation of the macromolecular weight silicone oil and the wear-resistant particles is more firm, the release speed is slower, the free mobility of the small molecular weight silicone oil is better, thereby having better non-stickiness, the medium molecular weight silicone oil takes into account the free mobility and firmness of the combination. Therefore, by combining the low molecular weight silicone oil, the medium molecular weight silicone oil and the high molecular weight silicone oil, on the one hand, the possibility of the silicone oil entering the microspheres is further increased, and on the other hand, the silicone oils with different binding forces can be continuously released at each stage of use, so as to play a better non-stick effect. As an example, the binding force between the silicone oil and the microspheres is generally 10KPa-25KPa. o With such a binding force, the continuous release of the silicone oil can be ensured, and the premature release or non-release of the silicone oil can be avoided. According to the present application, after the silicone oil and the microspheres are selected, the silicone oil is impregnated into the non-stick layer formed by the microspheres as the non-stick material, so as to obtain the cookware in which the silicone oil is combined in the pore structure of the non-stick layer. As an example, in the cookware coating, the weight of the silicone oil accounts for 5%-10% of the total weight of the cookware coating, and the balance is the non-stick layer formed by the microspheres. As an example, the time for impregnating the silicone oil into the non-stick layer can be 15min-30min, and the temperature can be 80°C-120°C, then the excess silicone oil on the surface is wiped dry, and then baking is performed, the temperature is 280°C-340°C, and the time is 3min-6min below, the specific examples are combined to describe the beneficial effects of the inventive concept. Example 1 is manufactured by the following method.

[0002] S100: Pretreatment is performed on the pot body. Specifically, the stainless steel body is sand blasted with 60# brown corundum to form a roughness of 3pm on the surface.

[0003] S200: Cleaning. The sand blasted body is cleaned.

[0004] S300: Spraying. A mixed slurry of titanium acid ferrous aluminum magnesium particles with a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:2 was sprayed and dried, and then heated to 600°C at a temperature increase rate of 18°C / min, and held for 7 h, and then heated to 1230°C at a temperature increase rate of 70°C / min, and held for 18 h, thereby forming microspheres of a spheroid shape with a porosity of 40%, a pore size of 60 nm, and a particle size of 30 pm as a non-stick material, and a non-stick layer with a thickness of 40 g m was formed on the pot base by plasma spraying, wherein the plasma spraying parameters were: powder feeding speed 13 g / min, spraying distance 110 mm, arc current 300 A, hydrogen pressure 0.7 MPa, hydrogen flow rate 150 L / h, oxygen pressure 1.2 MPa, M gas flow rate 1500 L / h

[0005] S400: Filling, a hydroxyl silicone oil having a molecular weight of 3000 was used as a silicone oil to impregnate the non-stick layer obtained above, the non-stick layer was impregnated for 30 min at a temperature of 90°C, and after towel wiping, drying was performed at a temperature of 300°C for 5 min. Through the above method, the non-stick pan of Example 1 was obtained. Example 2 was manufactured using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of titanium ferrous aluminum magnesium particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:1, which was spray-dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 35%, a pore size of 60 nm, and a particle size of 30 pm in a spherical shape). Example 3 was manufactured using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of titanium ferrous aluminum magnesium particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:3, which was spray-dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 50%, a pore size of 60 nm, and a particle size of 30 pm in a spherical shape). Example 4 was manufactured using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of titanium ferrous aluminum magnesium particles having a particle size D50 of 300 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 nm, and a particle size of 30 pm in a spherical shape). Example 5 was manufactured using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of titanium ferrous aluminum magnesium particles having a particle size D50 of 800 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 pm, and a particle size of 30 pm in a spherical shape).Example 6 was manufactured in the same manner as Example 1 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 45 μm formed by spray drying and sintering in the same manner). Example 7 was manufactured in the same manner as Example 1 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 15 μm formed by spray drying and sintering in the same manner). Example 8 was manufactured in the same manner as Example 1 except that a different binder was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium-magnesium-aluminum-iron phosphate particles having a particle diameter D50 of 500 nm and a hydroxymethylcellulose-based binder mixed at a weight ratio of 98:2, which was spray dried and sintered in the same manner as Example 1 to form a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 30 μm). Example 9 was manufactured in the same manner as Example 1 except that a different binder was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium-magnesium-aluminum-iron phosphate particles having a particle diameter D50 of 500 nm and polyethylene glycol mixed at a weight ratio of 98:2, which was spray dried and sintered in the same manner as Example 1 to form a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 30 μm). Example 10 was manufactured in the same manner as Example 1 except that a different silicone oil was used in Step S400 (wherein the hydroxyl silicone oil of this example was composed of 30 wt% of a hydroxyl silicone oil having a molecular weight of 800, 40 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 30 wt% of a hydroxyl silicone oil having a molecular weight of 12000).Example 11 was produced using the same method as Example 1 except that a different silicone oil was used in step S400 (wherein the hydroxyl silicone oil of the present example was composed of 20 wt% of a hydroxyl silicone oil having a molecular weight of 800, 50 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 30 wt% of a hydroxyl silicone oil having a molecular weight of 12000). Example 12 was produced using the same method as Example 1 except that a different silicone oil was used in step S400 (wherein the hydroxyl silicone oil of the present example was composed of 20 wt% of a hydroxyl silicone oil having a molecular weight of 800, 60 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 20 wt% of a hydroxyl silicone oil having a molecular weight of 12000). Example 13 (below is the basalt corresponding example) was produced using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of the present example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 60 nm, and a particle size of 30 pm in a spherical shape). Example 14 was produced using the same method as Example 13 except that a different non-stick material was used in step S300 (wherein the non-stick material of the present example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:1, which was spray dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 35%, a pore size of 60 nm, and a particle size of 30 pm in a spherical shape). Example 15 was produced using the same method as Example 13 except that a different non-stick material was used in step S300 (wherein the non-stick material of the present example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:3, which was spray dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 50%, a pore size of 60 nm, and a particle size of 30 pm in a spherical shape).Example 16 A pot of Example 16 was produced using the same method as Example 13 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of basalt particles having a particle size D50 of 300 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 nm and a particle size of 30 pm of a spheroid-like shape). Example 17 A pot of Example 17 was produced using the same method as Example 13 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of basalt particles having a particle size D50 of 800 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 1 pm and a particle size of 30 pm of a spheroid-like shape). Example 18 A pot of Example 18 was produced using the same method as Example 13 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle size of 45 pm of a spheroid-like shape). Example 19 A pot of Example 19 was produced using the same method as Example 13 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle size of 15 pm of a spheroid-like shape). Example 20 A pot of Example 20 was produced using the same method as Example 13 except that a different binder was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and a hydroxymethyl cellulose-based binder mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 11 to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle size of 30 pm of a spheroid-like shape).Example 21 A pot of Example 21 was produced using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of basalt particles having a particle size D50 of 500 nm and polyethylene glycol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle size of 30 pm of a spheroid-like shape). Example 22 (the following is a binary amorphous alloy corresponding example) A pot of Example 22 was produced using the same method as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was binary amorphous alloy particles having a particle size D50 of 500 nm, the binary amorphous alloy being specifically a titanium-iron alloy in which 45 wt% Fe, 50 wt% Ti, 2 wt% Si and 3 wt% Al were mixed with polyvinyl alcohol at a weight ratio of 98:1, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle size of 30 pm of a spheroid-like shape). Example 23 A pot of Example 23 was produced using the same method as Example 22 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of binary amorphous alloy particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:1, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 35%, a pore size of 60 nm and a particle size of 30 pm of a spheroid-like shape). Example 24 A pot of Example 24 was produced using the same method as Example 22 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of binary amorphous alloy particles having a particle size D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:3, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 50%, a pore size of 60 nm and a particle size of 30 pm of a spheroid-like shape).Example 25 A pan of Example 25 was produced using the same method as Example 22 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of binary amorphous alloy particles having a particle diameter D50 of 300 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 nm, and a particle diameter of 30 pm in the form of spheroids). gExample 27 was manufactured in the same manner as Example 22 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 45 μm formed by spray drying and sintering in the same manner). Example 28 was manufactured in the same manner as Example 22 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 15 μm formed by spray drying and sintering in the same manner). Example 29 was manufactured in the same manner as Example 22 except that a different binder was used in step S300 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 30 μm formed by spray drying a mixed slurry of binary amorphous alloy particles having a particle diameter D50 of 500 nm and a hydroxymethyl cellulose-based binder mixed at a weight ratio of 98:1 and sintering in the same manner as Example 1). Example 30 was manufactured in the same manner as Example 22 except that a different binder was used in step S400 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 30 μm formed by spray drying a mixed slurry of binary amorphous alloy particles having a particle diameter D50 of 500 nm and polyethylene glycol mixed at a weight ratio of 98:2 and sintering in the same manner as Example 1). Example 31 was manufactured in the same manner as Example 1 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a spherically-shaped microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 30 μm formed by spray drying a mixed slurry of ferrite particles having a particle diameter D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:2 and sintering in the same manner as Example 1).Example 32 was manufactured by the same method as Example 31 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of magnetite particles having a particle diameter D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:1, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 35%, a pore size of 60 nm and a particle diameter of 30 pm of a spheroid-like shape). Example 33 was manufactured by the same method as Example 31 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of magnetite particles having a particle diameter D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:3, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 50%, a pore size of 60 nm and a particle diameter of 30 pm of a spheroid-like shape). Example 34 was manufactured by the same method as Example 31 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of magnetite particles having a particle diameter D50 of 300 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 nm and a particle diameter of 30 pm of a spheroid-like shape). Example 35 was manufactured by the same method as Example 31 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a mixed slurry of magnetite particles having a particle diameter D50 of 800 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 pm and a particle diameter of 30 pm of a spheroid-like shape).Example 36 A pot of Example 36 was produced using the same method as Example 31 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a spheroid-like microsphere having a porosity of 40%, a pore size of 60 nm and a particle diameter of 45 μm formed by spray drying and sintering in the same manner). Example 37 A pot of Example 37 was produced using the same method as Example 31 except that a different non-stick material was used in step S300 (wherein the non-stick material of this example was a spheroid-like microsphere having a porosity of 40%, a pore size of 60 nm and a particle diameter of 15 μm formed by spray drying and sintering in the same manner). Example 38 A pot of Example 38 was produced using the same method as Example 31 except that a different binder was used in step S300 (wherein the non-stick material of this example was a spheroid-like microsphere having a porosity of 40%, a pore size of 60 nm and a particle diameter of 30 μm formed by spray drying a mixed slurry of Fe3O4 particles having a particle diameter D50 of 500 nm and a hydroxymethylcellulose-based binder mixed at a weight ratio of 98:2 and sintering in the same manner as Example 1). Example 39 A pot of Example 39 was produced using the same method as Example 31 except that a different binder was used in step S300 (wherein the non-stick material of this example was a spheroid-like microsphere having a porosity of 40%, a pore size of 60 nm and a particle diameter of 30 μm formed by spray drying a mixed slurry of Fe3O4 particles having a particle diameter D50 of 500 nm and polyethylene glycol mixed at a weight ratio of 98:2 and sintering in the same manner as Example 1). Example 40 A pot of Example 40 was produced using the same method as Example 31 except that a different silicone oil was used in step S400 (wherein the hydroxyl silicone oil of this example was composed of 30 wt% of a hydroxyl silicone oil having a molecular weight of 800, 40 wt% of a hydroxyl silicone oil having a molecular weight of 3000 and 30 wt% of a hydroxyl silicone oil having a molecular weight of 12000).Example 41 A pan of Example 41 was produced in the same manner as Example 31 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same sintering manner as Example 1 to form a spheroid-like microsphere having a porosity of 40%, a pore size of 60 nm, and a particle diameter of 30 im). Example 42 A pan of Example 42 was produced in the same manner as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98: 1, which was spray-dried and sintered in the same sintering manner as Example 1 to form a spheroid-like microsphere having a porosity of 35%, a pore size of 60 nm, and a particle diameter of 30 im). Example 43 A pan of Example 43 was produced in the same manner as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 500 nm and polyvinyl alcohol mixed at a weight ratio of 98:3, which was spray-dried and sintered in the same sintering manner as Example 1 to form a spheroid-like microsphere having a porosity of 50%, a pore size of 60 nm, and a particle diameter of 30 im). Example 44 A pan of Example 44 was produced in the same manner as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 300 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same sintering manner as Example 1 to form a spheroid-like microsphere having a porosity of 40%, a pore size of 10 nm, and a particle diameter of 30 im).Example 45 A pan of Example 45 was produced by the same method as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 800 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 10 μm and a particle diameter of 30 μm). Example 46 A pan of Example 46 was produced by the same method as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was microspheres having a porosity of 40%, a pore size of 60 nm and a particle diameter of 45 μm, which were formed by spray-drying and sintering). Example 47 A pan of Example 47 was produced by the same method as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was microspheres having a porosity of 40%, a pore size of 60 nm and a particle diameter of 15 μm, which were formed by spray-drying and sintering in the same sintering manner as Example 1). Example 48 A pan of Example 48 was produced by the same method as Example 41 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 500 nm and a hydroxymethyl cellulose-based binder mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same sintering manner as Example 1 to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle diameter of 30 μm). Example 49 A pan of Example 49 was produced by the same method as Example 41 except that a different binder was used in Step S400 (wherein the non-stick material of this example was a mixed slurry of titanium oxide particles having a particle diameter D50 of 500 nm and polyethylene glycol mixed at a weight ratio of 98:2, which was spray-dried and sintered to form microspheres having a porosity of 40%, a pore size of 60 nm and a particle diameter of 30 μm).Example 50 was manufactured by the same method as Example 41 except that a different silicone oil was used in Step S400 (wherein the hydroxyl silicone oil of this example was composed of 30 wt% of a hydroxyl silicone oil having a molecular weight of 800, 50 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 20 wt% of a hydroxyl silicone oil having a molecular weight of 12000). Example 51 was manufactured by the same method as Example 41 except that a different silicone oil was used in Step S400 (wherein the hydroxyl silicone oil of this example was composed of 20 wt% of a hydroxyl silicone oil having a molecular weight of 800, 60 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 20 wt% of a hydroxyl silicone oil having a molecular weight of 12000). Example 1 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this comparative example was composed of 50 wt% of a hydroxyl silicone oil having a molecular weight of 800, 30 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 20 wt% of a hydroxyl silicone oil having a molecular weight of 12000), which was spray-dried and sintered at 150°C to form a non-stick material having a porosity of 8%, a pore size of 100 nm, and a particle size of 30 Example 1 except that a different non-stick material was used in Step S300 (wherein the non-stick material of this comparative example was composed of 50 wt% of a hydroxyl silicone oil having a molecular weight of 800, 30 wt% of a hydroxyl silicone oil having a molecular weight of 3000, and 20 wt% of a hydroxyl silicone oil having a molecular weight of 12000), which was spray-dried and sintered at 150°C to form a non-stick material having a porosity of 8%, a pore size of 100 nm, and a particle size of 30 gExample 1, except that a different non-stick material was used in step S300 (the non-stick material of this comparative example was a mixed slurry of magnetite particles having a particle diameter D50 of 100 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as in Example 1 to form spheroid-like microspheres having a porosity of 30%, a pore size of 5 nm, and a particle diameter of 30 pm). Example 2 A pan of Comparative Example 2 was produced in the same manner as in Example 1, except that a different non-stick material was used (the non-stick material of this comparative example was a mixed slurry of titanium-magnesium-aluminum-iron particles having a particle diameter D50 of 500 nm, which was spray-dried and sintered in the same manner as in Example 1 to form spheroid-like microspheres having a porosity of 30%, a pore size of 5 nm, and a particle diameter of 30 pm). Comparative Example 3 The non-stick material of this comparative example was basalt particles having a particle diameter D50 of 500 nm. Comparative Example 4 The non-stick material of this comparative example was basalt particles having a particle diameter D50 of 500 nm. Comparative Example 5 The non-stick material of this comparative example was binary amorphous alloy particles having a particle diameter D50 of 500 nm. Comparative Example 6 The non-stick material was magnetite particles having a particle diameter of 100 nm to 900 nm. Comparative Example 7 The non-stick material was titanium oxide particles having a particle diameter of 100 nm to 900 nm. Comparative Example 8 A pan of Comparative Example 5 was produced in the same manner as in Example 1, except that a different non-stick material was used in step S300 (the non-stick material of this comparative example was a mixed slurry of magnetite particles having a particle diameter D50 of 90 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as in Example 1 to form spheroid-like microspheres having a porosity of 30%, a pore size of 5 nm, and a particle diameter of 30 pm). Comparative Example 9 A pan of Comparative Example 6 was produced in the same manner as in Example 1, except that a different non-stick material was used in step S300 (the non-stick material of this comparative example was a mixed slurry of magnetite particles having a particle diameter D50 of 100 nm and polyvinyl alcohol mixed at a weight ratio of 98:2, which was spray-dried and sintered in the same manner as in Example 1 to form spheroid-like microspheres having a porosity of 55%, a pore size of 800 nm, and a particle diameter of 30 pm). Comparative Example 10 A pan of Comparative Example 7 was produced in the same manner as in Example 1, except that a different non-stick material was used in step S300 (the non-stick material of this comparative example was a mixed slurry of magnetite particles having a particle diameter of 1-10 pm and hydroxymethylcellulose mixed at a weight ratio of 98:12, which was spray-dried and sintered at 150°C to form spheroid-like microspheres having a porosity of 3%, a pore size of 100 nm, and a particle diameter of 30 pm). The non-stick properties of the non-stick pans of Examples 1-51 and Comparative Examples 1-10 above were tested, and the test results are shown in the following table. Note that basalt and magnetite both belong to the mineral category and have similar properties, and the examples corresponding to magnetite will not be repeated here.It should be understood that the magnetite has similar test results as the basalt. The performance index test is performed on the above obtained cookware, and the specific performance test method is as follows.

[0006] 1. Initial non-stick test method The initial non-stick test method is the egg boiling non-stick test method in GB / T32095.2-2015, which is an initial non-stick test, and is divided into I, II and III levels, with I level being the best and III level being the worst.

[0007] 2. Persistent non-stick test method The persistent non-stick test method is the persistent non-stick test method in GB / T32388-2015, which is expressed by the number of times, and the higher the number of times, the longer the service life. The non-stick result is evaluated once at 500 times, and the number of times until III level is recorded. 3. Steel ball impact test and evaluation standard: 500g steel ball is dropped freely from a certain height above the inner bottom of the sample, with a 5cm interval, to observe whether the inner surface non-stick layer is cracked or collapsed, and record the height at which the cracking or collapse occurs. The higher the height, the stronger the impact resistance of the coating, and the height should be no less than 20cm, which can represent the bonding force of the coating.

[0008] 4. Tensile strength test The test is performed according to the test method specified in GB / T 8642-2002 Determination of the tensile bonding strength of thermal sprayed coatings, wherein the larger the test data, the higher the bonding force, and vice versa. By comparing and analyzing the inventive concept of Examples 1-30 and Comparative Examples 1-5, it can be seen that the pot formed by the microspheres of the wear-resistant material according to the present application as the non-stick material can have excellent performance in initial non-stickness, durable non-stickness and bonding force, etc., the wear-resistant material including at least one of a multi-metallic cationic metal salt, a basalt, a magnetite and a binary amorphous alloy, wherein, in terms of bonding force, the alloy > the multi-metallic cationic metal salt > the basalt, and in terms of non-stickness, the basalt > the multi-metallic cationic metal salt > the alloy. By comparing and analyzing the inventive concept of Examples 31-50 and Comparative Examples 1-10, it can be seen that, within the range of the pore structure of the present application, the higher the porosity, the better the durable non-stick effect. Under the same porosity, the pore size is best moderate, if the pore size is too large, the oil absorption effect is good, but the number of pores is not enough, so that the non-stick uniformity is not enough, if the pore size is too small, the number of pores is large, but the oil absorption effect is relatively low. By comparing Example 31, Comparative Example 1 and Comparative Example 2, it can be roughly seen that: the particle size of the raw material of Comparative Examples 31 and 2 exceeds the upper limit of the particle size of the present application, the sintering temperature after spray drying is only 150°C, a large amount of binder remains, the porosity of the non-stick material formed is relatively small, under this condition, the durable non-stickness is poorer than that of Example 31, and due to the influence of the organic binder, the bonding force with the substrate is also poorer than that of Example 31. By comparing Example 31 and Comparative Example 8, it can be roughly seen that: the particle size of the raw material is lower than the lower limit of the particle size of the present application, even if the same drying method of the present application is adopted, the porosity and pore size cannot meet the expected requirements, and the pore size is particularly small, so the silicone oil does not easily enter, making the durable non-stickness of the pot poor. By comparing Example 31 and Comparative Example 9, it can be roughly seen that: the particle size of the raw material is higher than the upper limit of the particle size of the present application, even if the same drying method of the present application is adopted, the porosity and pore size cannot meet the expected requirements, and the pore size is particularly large, although the silicone oil easily enters, but it will greatly affect other properties of the pot, for example but not limited to, the bonding force between the substrate. Although one or more embodiments of the present application have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A non-stick material for cookware, characterized in that, The non-stick material is a microsphere with a porous structure. The microsphere with a porous structure is formed by spray drying and sintering a mixed slurry including nanoscale wear-resistant particles and a binder. The wear-resistant particles include at least one of metal oxides, polymetallic cationic metal salts, basalt, magnetite, and binary amorphous alloys.

2. The non-stick material according to claim 1, characterized in that, The porosity of the pore structure is 35%-50%, and the pore size is 10nm-1pm.

3. The non-stick material according to claim 1 or 2, characterized in that, The wear-resistant particles have a particle size of 100nm-900nm.

4. The non-stick material according to any one of claims 1 to 3, characterized in that, The contact portions between adjacent wear-resistant particles interlock with each other.

5. The non-stick material according to any one of claims 1 to 4, characterized in that, The microspheres are spherical or near-spherical in shape, and the particle size of the microspheres is 15 mm. g m-45 g mo 6. The non-stick material according to any one of claims 1 to 4, characterized in that, The metal oxide particles include at least one of iron oxide particles, titanium oxide particles, and titanium suboxide particles.

7. The non-stick material according to any one of claims 1 to 6, characterized in that, The microspheres contain carbonized products of a binder, which adhere to a portion of the surface of the wear-resistant particles. The weight ratio of the carbonized binder products to the wear-resistant particles in the microspheres is [insert weight ratio here]. (0.5-1 ) :98o 8. A method for manufacturing a non-stick material, characterized in that, The method includes: providing a mixed slurry comprising nanoscale wear-resistant particles and a binder; spray-drying the mixed slurry to obtain spray-dried microspheres; and then sintering the spray-dried microspheres at a preset temperature to form a non-stick material with a porous structure and in the form of microspheres, wherein the wear-resistant particles comprise at least one of metal oxides, polymetallic cationic metal salts, basalt, magnetite, and binary amorphous alloys.

9. The method according to claim 8, characterized in that, The weight ratio of the wear-resistant particles to the binder is 98:(1-3).

10. The method according to claim 8 or 9, characterized in that, The preset temperature is 500. 34 The sintering process at the preset temperature includes heating the spray-dried microspheres to the preset temperature at a heating rate of 15°C / min to 20°C / min, holding for 6h to 8h, and then heating to 1200°C to 1250°C at a heating rate of 55°C / min to 100°C / min, holding for 12h to 24h.

11. A non-stick layer, characterized in that, The non-stick layer is formed by spraying the non-stick material according to any one of claims 1 to 7, or by spraying the non-stick material obtained by the method for manufacturing non-stick materials according to any one of claims 8 to 10.

12. The non-stick layer according to claim 11, characterized in that, The non-stick layer has a porous structure with a porosity of 50%-70% and a pore size of 10nm-10μm.

13. A cooking utensil, characterized in that, The cookware includes a cookware body and a non-stick layer formed on the inner surface of the cookware body, wherein the non-stick layer is the non-stick layer according to claim 11 or 12.

14. The cookware according to claim 13, characterized in that, The non-stick layer has a porous structure, which is filled with silicone oil.

15. The cookware according to claim 13 or 14, characterized in that, An oil film is formed on the surface of the non-stick layer. 35

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