Pot stand and preparation method thereof

Abstract

The present invention discloses a pot rack and a preparation method thereof, and relates to the technical field of kitchen stoves. The pot rack of the present invention is used to support pots. The pot rack comprises a substrate, and a high-temperature resistant inorganic layer and an oleophobic layer sequentially wrapped on the surface of the substrate. The substrate comprises a fixedly connected support portion and a mounting portion. The mounting portion is used to be arranged or connected with the stove, and the support portion is used to support the pot. The pot rack and the preparation method thereof provided by the present invention can solve the technical problems in the prior art that the coating is easily discolored by high temperature and the coating surface cannot be cleaned due to oil stains penetrating into the coating surface.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen stoves, and in particular to a pot rack and a preparation method thereof. Background Art

[0002] The pot rack, also known as the stove rack, is a bracket installed around the upper part of the combustion burner of the gas stove to support the pot. The purpose is to keep the bottom of the pot at an appropriate distance from the combustion burner to allow the gas and air to be fully mixed, thereby making the gas burn more fully, improving gas utilization and reducing exhaust gas emissions.

[0003] As the energy efficiency of stoves is further improved, the temperature of the surface of the pot rack is getting higher and higher. In order to prevent the excessive temperature at the gas stove panel from damaging the components inside the gas stove cavity, enamel coating or ceramic coating is usually sprayed on the surface of the pot rack to make the pot rack have the function of heat insulation. However, the surface of the enamel coating pot rack is rough and easily absorbs oil stains. It is easy to crack under high temperature conditions and is not resistant to dirt. Although the surface of the ceramic coating pot rack is delicate, the coating will become loose under high temperature conditions, and it is also easy to absorb oil stains and is difficult to clean. Summary of the invention

[0004] The purpose of the present application is to provide a pot rack and a preparation method thereof, which can solve the technical problems in the prior art that the coating is easily discolored at high temperatures and oil stains penetrate into the coating surface and cannot be cleaned.

[0005] On the one hand, an embodiment of the present application provides a pot rack for supporting pots, the pot rack comprising a base, and a high-temperature resistant inorganic layer and an oleophobic layer sequentially wrapped on the surface of the base, the base comprising a fixedly connected supporting portion and an installing portion, the installing portion being used to cooperate with or connect to a stove, and the supporting portion being used to support the pot.

[0006] As an practicable manner, the high temperature resistant inorganic layer includes a glassy inorganic layer.

[0007] As an practicable method, the glassy inorganic layer is formed by sintering a mixed solution, and the composition of the mixed solution is, by weight, 20-30% silicon dioxide, 5-8% aluminum oxide, 7-10% calcium oxide, 10-15% cobalt black, 0.5-1% silicone additive, and 45-60% water.

[0008] As an practicable approach, the thickness of the glassy inorganic layer is between 20-50 um, and the surface roughness is between 0.1-0.5 um.

[0009] As an practicable manner, the oleophobic layer includes a silicon dioxide layer.

[0010] As an practicable manner, the thickness of the silicon dioxide layer is between 0.5-3 um, and the surface roughness is less than 0.05 um.

[0011] As an practicable manner, the substrate includes one of a cold-rolled steel plate substrate, a 316 steel substrate, a 304 steel substrate or a 403 steel substrate.

[0012] On the other hand, an embodiment of the present application provides a method for preparing a pot rack, which is used to support pots. The method for preparing the pot rack includes: providing a base, the base including a supporting portion and an installing portion that are fixedly connected, the installing portion being used to be arranged or connected with a stove, and the supporting portion being used to support the pot; wrapping a high-temperature resistant inorganic layer on the surface of the base; and wrapping an oleophobic layer on the surface of the high-temperature resistant inorganic layer.

[0013] As an practicable method, forming a high-temperature resistant inorganic layer on the surface of a substrate includes: preparing a mixed solution, the composition of the mixed solution is in proportion by weight: 20-30% silicon dioxide, 5-8% aluminum oxide, 7-10% calcium oxide, 10-15% cobalt black, 0.5-1% silicone additive, and 45-60% water; grinding the solution until the fineness of the solution is between 3-5um to form a ground solution; spraying the ground solution on the surface of the substrate; sintering the substrate sprayed with the ground solution to form a high-temperature resistant inorganic layer on the surface of the substrate.

[0014] As an practicable method, the substrate sprayed with the grinding solution is sintered to form a high-temperature resistant inorganic layer on the surface of the substrate. The sintering conditions are: the sintering temperature is between 520-560°C and the sintering time is between 20-30 minutes.

[0015] As an practicable method, forming an oleophobic layer on the surface of the high temperature resistant inorganic layer includes: spraying a silazane polymer on the surface of the high temperature resistant inorganic layer; sintering a substrate coated with the high temperature resistant inorganic layer and sprayed with the silazane polymer to form an oleophobic layer on the high temperature resistant inorganic layer.

[0016] As an practicable method, a substrate coated with a high temperature resistant inorganic layer and sprayed with a silazane polymer is sintered to form an oleophobic layer on the high temperature resistant inorganic layer. The sintering conditions are: a sintering temperature between 180-200°C and a sintering time between 15-20 minutes.

[0017] The beneficial effects of the embodiments of the present application include:

[0018] The pot rack provided by the present invention is used to support the pot, so that a certain distance is maintained between the pot and the stove, and air can enter the space between the pot and the stove to fully mix with the gas, thereby improving the utilization rate of the gas. The pot rack includes a substrate, and a high-temperature resistant inorganic layer and an oleophobic layer sequentially wrapped on the surface of the substrate. The high-temperature resistant inorganic layer can isolate the heat during gas combustion, thereby avoiding the overheating of the pot rack and causing the temperature at the panel to be too high, and has the characteristics of high temperature resistance. The oleophobic layer has the characteristics of oleophobicity, which can avoid oil stains from adhering to the surface of the pot rack, thereby making the pot rack free of oil stains, not easy to change color, and easy to clean. The substrate includes a fixedly connected support portion and a mounting portion, the mounting portion is used to be arranged or connected with the stove, and the support portion is used to support the pot. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a pot rack provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 Schematic diagram of the cross section of AA;

[0022] Figure 3 One of the flow charts of a method for preparing a pot stand provided in an embodiment of the present application;

[0023] Figure 4 A second flow chart of a method for preparing a pot stand provided in an embodiment of the present application;

[0024] Figure 5 This is a third flow chart of a method for preparing a pot stand provided in an embodiment of the present application.

[0025] Icon: 100 - pot stand; 110 - base; 120 - high temperature resistant inorganic layer; 130 - oleophobic layer; 140 - supporting part; 150 - mounting part. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The pot rack is usually placed on the stove to support the pot so that a certain distance is maintained between the pot and the stove. In order to prevent the pot rack temperature from being too high when the gas is burned, which leads to too high a panel temperature, an insulation layer is usually sprayed on the outside of the pot rack. In the prior art, the insulation layer is easily discolored at high temperature and oil stains penetrate into the coating surface and cannot be cleaned.

[0031] The present invention provides a pot stand 100, such as Figure 1 , Figure 2 As shown, the pot rack 100 is used to support the pot. The pot rack 100 includes a base 110, and a high-temperature resistant inorganic layer 120 and an oleophobic layer 130 sequentially wrapped on the surface of the base 110. The base 110 includes a fixedly connected support portion 140 and a mounting portion 150. The mounting portion 150 is used to be arranged or connected with the stove, and the support portion 140 is used to support the pot.

[0032] The base 110, as the main body of the pot rack 100, needs to support the pot, and should have a certain support force and a certain rigidity. The high temperature resistant inorganic layer 120 and the oleophobic layer 130 are sequentially wrapped on the surface of the base 110. The high temperature resistant inorganic layer 120 has the characteristics of high temperature resistance, and the oleophobic layer 130 has the characteristics of oleophobicity. Under the joint action of the high temperature resistant inorganic layer 120 and the oleophobic layer 130, the pot rack 100 can be prevented from being easily discolored by high temperature and oil stains can be infiltrated into the coating surface.

[0033] The embodiment of the present invention does not limit the specific structure of the base 110, which may be circular, square, or other shapes, and may include three corner pieces, four corner pieces, or more. Those skilled in the art may make specific arrangements according to actual conditions, as long as it includes a support portion 140 and a mounting portion 150. The mounting portion 150 is used to place the pot rack 100 on the stove, and the support portion 140 is used to support the pot. Figure 1 It is just one form of the substrate 110 and is used to illustrate the location of the coating on the pot rack 100 , but is not intended to limit the embodiment of the present invention.

[0034] The pot rack 100 provided by the present invention is arranged on the stove to support the pot, so that a certain distance is maintained between the pot and the stove, and air can enter the space between the pot and the stove, fully mix with the gas, and improve the utilization rate of the gas. The pot rack 100 includes a substrate 110, and a high-temperature resistant inorganic layer 120 and an oleophobic layer 130 wrapped on the surface of the substrate 110 in sequence. The high-temperature resistant inorganic layer 120 can isolate the heat during gas combustion, avoid the overheating of the pot rack 100 and cause the temperature at the panel to be too high, and has the characteristics of high temperature resistance. The oleophobic layer 130 has the characteristics of oleophobicity, which can prevent oil stains from adhering to the surface of the pot rack 100, so that the pot rack 100 does not occupy oil stains, is not easy to change color, and is easy to clean. The substrate 110 includes a fixedly connected support portion 140 and a mounting portion 150, the mounting portion 150 is used to set the pot rack 100 on the stove, and the support portion 140 is used to support the pot.

[0035] Optionally, the high temperature resistant inorganic layer 120 includes a glassy inorganic layer.

[0036] The glassy inorganic layer has the advantages of dense surface, high temperature resistance, ultra-high hardness, ultra-wear resistance and scratch resistance. Specifically, the present invention compares the scratch resistance and hardness of different coatings under the same conditions. The different coatings are glassy inorganic layer + oil-proof layer, enamel coating and ceramic coating. The results are shown in Table 1.

[0037] Table 1

[0038]

[0039] It can be seen from Table 1 that the glassy inorganic layer + oil-proof layer has a higher scratch resistance and a higher hardness.

[0040] In addition, the glassy inorganic layer has certain adsorption and wettability, and can fit well with the substrate 110, thereby improving the adhesion of the glassy inorganic layer. The glassy inorganic layer also has the characteristic of a low expansion coefficient. When in use, the high temperature generated by the combustion of gas will not cause it to change its volume too much, thereby avoiding the occurrence of cracks due to high temperature.

[0041] In one achievable method of an embodiment of the present invention, the glassy inorganic layer is formed by sintering a solution of a mixture of the following raw materials, wherein the weight proportion of each raw material is: silicon dioxide accounts for between 20-30%, aluminum oxide accounts for between 5-8%, calcium oxide accounts for between 7-10%, cobalt black accounts for between 10-15%, silicone additive accounts for between 0.5-1%, and water accounts for between 45-60%.

[0042] Among them, silicon dioxide has a relatively high hardness value and relatively stable chemical properties. It does not react chemically with water and weak acids, and has a high melting point and is not easily deformed at high temperatures. Alumina is a high-hardness compound. Cobalt black and silicone additives are used as sintering catalysts, among which cobalt black is also called black cobalt oxide. Water is used as a solvent to mix various raw materials, which will evaporate during sintering.

[0043] Optional, such as Figure 2 As shown, the thickness of the glassy inorganic layer is between 20-50 um, and the surface roughness is between 0.1-0.5 um.

[0044] The glassy inorganic layer is wrapped around the surface of the substrate 110 for heat insulation to prevent the high temperature from causing the panel temperature to be too high. For example, the thickness of the glassy inorganic layer is set to 30 um.

[0045] In one achievable manner of the embodiment of the present invention, the oleophobic layer 130 includes a silicon dioxide layer. The silicon dioxide layer has oleophobic and hydrophobic properties, so that oil, water, etc. are not easily bonded to the surface of the silicon dioxide layer, and the silicon dioxide layer, as the outermost layer of the pot rack 100, can make oil, water not easily bonded to the surface of the pot rack 100, thereby preventing oil from penetrating into the pot rack 100. Specifically, under the same conditions, the present invention compares the high-temperature stain resistance of different coatings, and the different coatings are glassy inorganic layer + oil-proof layer, enamel coating and ceramic coating, and the results are shown in Table 2.

[0046] Table 2

[0047]

[0048] It should be noted that, in order to make silicon dioxide can be better combined with glassy inorganic layer, to avoid subsequent use when falling, the silicon dioxide layer of the present invention is formed by sintering of silazane polymer, silazane polymer is an inorganic polymer with Si-N as the main chain, due to the particularity of its chemical structure, it can be converted into oleophobic silicon dioxide under high temperature conditions. When silazane polymer is sintered, the silicon dioxide layer formed is tightly combined with the glassy inorganic layer, so as to improve the adhesion of the silicon dioxide layer. And silicon dioxide chemical property is relatively stable, does not react chemically with water and weak acid, and has a higher melting point, is not easily deformed at high temperature, and has higher stability when used.

[0049] Optional, such as Figure 2 As shown, the thickness of the silicon dioxide layer is between 0.5-3um, and the surface roughness is less than 0.05um.

[0050] The surface of the silicon dioxide layer used as the oleophobic layer 130 should be as flat and smooth as possible, and the surface roughness should be as small as possible. However, due to the limitations of existing process technology, the surface roughness of the silicon dioxide layer is less than 0.05um. Furthermore, the surface roughness of the silicon dioxide layer is less than 0.03um, which can further improve the flatness of the silicon dioxide layer, thereby further improving the oleophobicity of the silicon dioxide layer.

[0051] The silicon dioxide layer is used as the oleophobic layer 130 , and the thickness is set between 0.5-3 um, and further, can be set between 0.5-2 um.

[0052] In one achievable manner of the embodiment of the present invention, the substrate 110 includes one of a cold-rolled steel plate substrate 110 , a 316 steel substrate, a 304 steel substrate or a 403 steel substrate.

[0053] The base 110, as the main body of the pot rack 100, needs to support the pot and should have a certain supporting force, and steel has a certain rigidity. Among them, cold-rolled steel plate has the advantages of smooth surface, high strength and high hardness. 316 steel, 304 steel and 403 steel have improved corrosion resistance and high temperature strength due to the addition of other metals.

[0054] The present invention also provides a method for preparing a pot rack 100, such as Figure 3 As shown, the pot rack 100 is arranged on the cooker for supporting the pot, and the preparation method of the pot rack 100 includes:

[0055] S110: Provide a base 110, the base 110 includes a support portion 140 and a mounting portion 150 that are fixedly connected, the mounting portion 150 is used to set the pot rack 100 on the cooker, and the support portion 140 is used to support the pot.

[0056] Those skilled in the art should know that when the surface of the substrate 110 is coated with the high temperature resistant inorganic layer 120, the surface of the substrate 110 needs to be dry and clean, because when the surface is dirty, it is not conducive to the coating of the high temperature resistant inorganic layer 120, so that the pot rack 100 has a coating that falls off in subsequent use. Therefore, before the surface of the substrate 110 is coated with the high temperature resistant inorganic layer 120, the surface of the substrate 110 needs to be processed. Specifically, the surface of the pot rack 100 is first degreased, then cleaned, and finally dried. For example, ultrasonic waves can be used to remove oil stains. Ultrasonic waves use organic solvents such as alcohol, and then cleaned with water, and finally dried in an oven. Of course, this is just an example of cleaning the substrate 110, and it is not a limitation on the cleaning of the substrate 110 in the embodiment of the present invention. Those skilled in the art can make settings according to actual conditions, as long as the surface of the substrate 110 can be cleaned.

[0057] S120: The surface of the substrate 110 is coated with a high temperature resistant inorganic layer.

[0058] When the high temperature resistant inorganic layer 120 is coated on the surface of the substrate 110 , the substrate 110 may be preheated first to improve the adhesion of the high temperature inorganic layer.

[0059] S130: Wrapping the oleophobic layer 130 on the surface of the high temperature resistant inorganic layer 120 .

[0060] The oleophobic layer 130 , as the outermost surface of the pot rack 100 , is oleophobic, so that oil stains and the like are not easily adhered to the surface of the oleophobic layer 130 , thereby preventing oil stains and the like from penetrating into the pot rack 100 .

[0061] The oleophobic layer 130 and the high temperature resistant inorganic layer 120 are both made of inorganic materials. According to the principle of like melts like, the oleophobic layer 130 and the high temperature resistant inorganic layer 120 can be firmly combined.

[0062] Optional, such as Figure 4 As shown, forming a high temperature resistant inorganic layer 120 on the surface of the substrate 110 includes:

[0063] S121: Mixing raw materials to form a solution, wherein the raw materials and their weight proportions include: silicon dioxide accounts for 20-30%, aluminum oxide accounts for 5-8%, calcium oxide accounts for 7-10%, cobalt black accounts for 10-15%, silicone additive accounts for 0.5-1%, and water accounts for 45-60%.

[0064] S122: Grinding the solution until the fineness of the solution is between 3-5 um to form a ground solution.

[0065] The above solution is ground by a grinder, and the fineness of the solution is measured by a scraper fineness meter during the grinding process until the fineness of the solution is between 3-5 um to form a ground solution.

[0066] There are many materials with high strength and large particles among the raw materials. If the raw materials with large particles are directly sprayed on the surface of the substrate 110, the surface roughness of the high temperature resistant inorganic layer 120 will increase, thereby increasing the surface roughness of the surface of the pot rack 100.

[0067] The present invention does not specifically limit the time for grinding the solution, and those skilled in the art can set it according to actual conditions, as long as the fineness of the solution meets the requirements. For example, the grinding time of the embodiment of the present invention is between 3-5 hours.

[0068] S123: spraying the polished solution on the surface of the substrate 110;

[0069] The grinded solution is sprayed onto the surface of the substrate 110 by a sprayer. The present invention does not limit the parameter setting of the sprayer during spraying, as long as the thickness of the high temperature resistant inorganic layer 120 is between 20-50 um.

[0070] S124: Sintering the ground solution sprayed on the surface of the substrate 110 to form a high temperature resistant inorganic layer 120.

[0071] In one achievable manner of the embodiment of the present invention, the ground solution sprayed on the surface of the substrate 110 is sintered to form the high temperature resistant inorganic layer 120, and the sintering conditions are: the sintering temperature is between 520-560°C, and the sintering time is between 20-30 minutes.

[0072] The high temperature resistant inorganic layer 120 is a glassy inorganic layer. In order for the solution to form a glassy inorganic layer after grinding, the required sintering temperature is between 520-560°C. During the sintering process, the high temperature causes the ions in the solution to rearrange and form a glassy inorganic substance, and also establishes chemical bonds with the ions in the matrix 110, so that it is tightly bonded to the matrix 110, thereby improving the adhesion of the high temperature resistant inorganic layer 120.

[0073] Optional, such as Figure 5 As shown, forming the oleophobic layer 130 on the surface of the high temperature resistant inorganic layer 120 includes:

[0074] S131: spraying silazane polymer on the surface of the high temperature resistant inorganic layer 120;

[0075] The silazane polymer is sprayed on the surface of the high temperature resistant inorganic layer 120 by a sprayer. The present invention does not limit the setting of the parameters of the sprayer during spraying, as long as the thickness of the oleophobic layer 130 is between 0.5-2 um.

[0076] An achievable method of an embodiment of the present invention is

[0077] S132: Sintering the silazane polymer to form the oleophobic layer 130.

[0078] The silazane polymer is sintered to form the oleophobic layer 130 , and the sintering conditions are: the sintering temperature is between 180-200° C., and the sintering time is between 15-20 min.

[0079] Silazane polymer is converted into silicon dioxide at the sintering temperature, and silicon dioxide is oleophobic, so that the pot rack 100 is not easy to be adhering to oil stains when working at high temperature for a long time. Among them, the temperature at which silazane polymer is converted into silicon dioxide is between 180-200°C, so the sintering temperature is set between 180-200°C. The sintering time is set between 15-20min, which avoids the situation where the silazane polymer is not converted into silicon dioxide due to the sintering time being too short, and also avoids the energy waste caused by continuing to sinter after the conversion of the silazane polymer into silicon dioxide is completed.

[0080] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pot stand (100), characterized in that: The pot rack (100) is used to support a pot, and the pot rack (100) comprises a base (110), and a high-temperature resistant inorganic layer (120) and an oleophobic layer (130) sequentially wrapped on the surface of the base (110), the base (110) comprises a support portion (140) and a mounting portion (150) which are fixedly connected, the mounting portion (150) is used to be arranged in cooperation with or connected to a stove, and the support portion (140) is used to support the pot; The high temperature resistant inorganic layer (120) comprises a glassy inorganic layer; the glassy inorganic layer is formed by sintering a mixed solution, wherein the composition of the mixed solution is, by weight, 20-30% silicon dioxide, 5-8% aluminum oxide, 7-10% calcium oxide, 10-15% cobalt black, 0.5-1% organic silicon additive, and 45-60% water.

2. The pot support (100) according to claim 1, characterized in that: The thickness of the glassy inorganic layer is between 20 and 50 μm, and the surface roughness is between 0.1 and 0.5 μm.

3. The pot support (100) according to claim 1, characterized in that: The oleophobic layer (130) includes a silicon dioxide layer.

4. The pot support (100) according to claim 3, characterized in that: The thickness of the silicon dioxide layer is between 0.5 and 3 μm, and the surface roughness is less than 0.05 μm.

5. The pot support (100) according to claim 1, characterized in that: The substrate (110) comprises one of a cold-rolled steel plate substrate, a 316 steel substrate, a 304 steel substrate or a 403 steel substrate.

6. A method for preparing a pot stand (100), characterized in that: The pot stand (100) is used to support a pot, and the method comprises: A base (110) is provided, wherein the base (110) comprises a support portion (140) and a mounting portion (150) which are fixedly connected, wherein the mounting portion (150) is used to be arranged or connected in coordination with a cooker, and the support portion (140) is used to support a cooker; A high temperature resistant inorganic layer (120) is coated on the surface of the substrate (110); An oleophobic layer (130) is wrapped on the surface of the high temperature resistant inorganic layer (120); The step of forming a high temperature resistant inorganic layer (120) on the surface of the substrate (110) comprises: Prepare a mixed solution, wherein the composition of the mixed solution is, by weight, 20-30% silicon dioxide, 5-8% aluminum oxide, 7-10% calcium oxide, 10-15% cobalt black, 0.5-1% organosilicon additive, and 45-60% water; Grinding the mixed solution until the fineness of the solution is between 3 and 5 μm to form a ground solution; spraying the grinding solution on the surface of the substrate (110); The substrate (110) sprayed with the grinding solution is sintered to form the high temperature resistant inorganic layer (120) on the surface of the substrate (110).

7. The method for preparing the pot support (100) according to claim 6, characterized in that: The substrate (110) sprayed with the grinding solution is sintered to form the high temperature resistant inorganic layer (120) on the surface of the substrate (110). The sintering conditions are: the sintering temperature is between 520-560°C and the sintering time is between 20-30 minutes.

8. The method for preparing the pot stand (100) according to claim 6, characterized in that: The step of forming an oleophobic layer (130) on the surface of the high temperature resistant inorganic layer (120) comprises: Spraying a silazane polymer on the surface of the high temperature resistant inorganic layer (120); The substrate coated with the high temperature resistant inorganic layer (120) and sprayed with the silazane polymer is sintered to form the oleophobic layer (130) on the high temperature resistant inorganic layer (120).

9. The method for preparing the pot stand (100) according to claim 8, characterized in that: The sintering conditions for sintering the substrate coated with the high temperature resistant inorganic layer and sprayed with the silazane polymer to form the oleophobic layer (130) on the high temperature resistant inorganic layer (120) are: sintering temperature between 180-200° C., and sintering time between 15-20 minutes.

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