469 results about "Zirconia ceramic" patented technology

The invention discloses an additive manufacturing method of high-toughness alumina whisker toughened zirconia ceramic, and relates to a forming method of whisker toughened zirconia ceramic. Based on a photocuring additive manufacturing technology and an ultra-fast high-temperature sintering technology, fast additive manufacturing of the high-toughness alumina whisker toughened zirconia ceramic is achieved. The steps of pre-dispersing, freeze-drying and non-contact stirring are matched, so that the photo-cured ceramic slurry with good alumina whisker dispersion and good printability can be prepared on the premise of not damaging the whiskers; the non-reactive diluent added in the resin formula serves as a thermoplastic resin solvent and can be discharged at a low temperature, so that uniform pore channels are formed in a matrix, subsequent discharge of pyrolysis gas of resin is facilitated, and generation of defects is reduced; the added thermoplastic polyimide is resistant to high temperature and can be reserved to a sintering stage, the high-temperature toughness of the green body is improved, and the semi-degreased green body is prevented from being broken in the ultra-fast high-temperature sintering process.

The invention discloses a method for preparing oriented alumina fiber toughened ceramic by using supergravity, and relates to the technical field of high-performance ceramic. The alumina fiber provided by the invention can be used as a reinforcing phase and is directionally arranged in at least one spatial dimension in a zirconia ceramic matrix, and the invention also provides a preparation method of the alumina fiber reinforced zirconia ceramic, which comprises the following steps: firstly, preparing zirconia slurry added with the alumina fiber; then realizing directional arrangement of the alumina fibers in the zirconium oxide green body in a supergravity environment, and finally drying and sintering the zirconium oxide green body to obtain the alumina fiber reinforced zirconium oxide ceramic with directional arrangement. The alumina fiber reinforced zirconia ceramic prepared by the invention has excellent bending strength and fracture toughness, and the preparation method is simple, high in efficiency and suitable for large-scale production.

The invention relates to the technical field of zirconia ceramic sintering, and discloses a zirconia ceramic microwave single-die-cavity rapid sintering system and an intelligent temperature control method.The system comprises a high-temperature-resistant metal cavity, a microwave generation unit, a temperature detection and control unit, a coil base assembly and an auxiliary structure, and centralized control is achieved through an intelligent touch control computer. A microwave single-mode resonance mode is adopted, a silicon carbide wave absorbing layer is used for enhancing microwave absorption, materials are evenly heated from inside to outside, an intelligent temperature control method is used for monitoring the temperature in real time based on a short-wave infrared thermometer, a PI D control algorithm is combined, the power of a magnetron is dynamically adjusted through an adjustable power source, the temperature control precision reaches + / -2 DEG C, and the temperature control precision reaches + / -2 DEG C; the problems of non-uniform temperature, high energy consumption, high rejection rate, long sintering time and the like in a traditional zirconia ceramic sintering process are effectively solved, the production efficiency can be greatly improved, the cost is reduced, the product quality is improved, the equipment also supports multiple process modes, and diversified production requirements are met.

The invention discloses a simulation test method for ceramic sintering stress and a method for reducing the ceramic sintering stress. The simulation test method comprises the following steps: 1, measuring the grain size, the relative density and the geometric size before and after sintering; 2, establishing a ceramic geometry by using Abaqus, and constructing a transient heat conduction model; 3, establishing a viscoelastic constitutive equation of sintering shrinkage deformation of the zirconia ceramic, and constructing a sintering shrinkage model; and 4, sequentially coupling the transient heat conduction model and the sintering shrinkage model, and implementing joint simulation of solid-phase sintering simulation to obtain a sintering stress simulation result of the ceramic. The method for reducing the ceramic sintering stress comprises the following steps: 5, establishing a ceramic sintering shrinkage finite element model with grain sizes distributed in proportion, and calculating average sintering stress distribution of the grain size proportion distribution model; and 6, comparing the average sintering stress of the sintering shrinkage models with different grain size proportions, and determining a method for reducing the sintering stress. The ceramic sintering quality and the production efficiency are improved.

The invention provides a granulation raw material, a pre-sintered body, a zirconia porcelain block, a fast firing production method and application. The fast firing production method comprises the following steps: S1, providing a first zirconium oxide material and a second zirconium oxide material; s2, compounding the first zirconium oxide material and the second zirconium oxide material, and granulating together with an auxiliary material to obtain a granulation raw material; s3, obtaining a green body based on the granulation raw materials; s4, carrying out pre-sintering treatment on the green body to obtain a pre-sintered body; and S5, machining the pre-sintered body, and then carrying out fast firing treatment to obtain the zirconium oxide porcelain block. On the basis of compounding of granulation raw materials, the overall performance of the zirconia ceramic block can be improved while a pre-sintered body can be rapidly sintered.

The invention discloses zirconia ceramic powder, a preparation method thereof and a zirconia sintered body, and relates to the technical field of zirconia. The zirconia ceramic powder comprises a solid solution formed by zirconia and a stabilizer, the specific surface area of the zirconia ceramic powder is 10-32 m < 2 > / g, the average particle size D50 is 0.1-0.3 [mu] m, the average particle size D90 is 0.2-0.5 [mu] m, and the peak intensity ratio of the crystal grain 220 crystal face / 200 crystal face of the zirconia ceramic powder obtained through powder X-ray diffraction measurement is 1.2-2.5. The zirconia ceramic powder in which the average crystallite diameter # imgabs0 # of the grains obtained from the (-111) plane peak of the grains of the zirconia ceramic powder in X-ray diffraction measurement satisfies the numerical range has a specific crystal plane orientation, so that low-temperature sintering can be realized without adding a sintering aid. And a sintered body having high strength and high sintering density can be obtained.

The invention discloses graded particle zirconia ceramic and a preparation method thereof.The graded particle zirconia ceramic comprises nano zirconia powder and porous microspheres, each porous microsphere is internally provided with a closed and / or communicated and through microporous structure, the particle size of each porous microsphere is 10-200 micrometers, and the particle size of each porous microsphere is 10-200 micrometers. And the aperture of the internal micropores is 0.3-1 [mu] m. According to the invention, the porous microsphere introduces a microporous structure into the graded particle ceramic, and the distribution of the microporous structure is consistent with that of the calcined microsphere in the graded particle ceramic, so that when the ceramic is damaged and the crack expands to a microporous area, the micropores at the tip of the crack bear larger stress due to a stress concentration effect; the microcrack toughening agent can induce main crack bifurcation or deflection, consumes crack propagation energy, prolongs a crack propagation path, and has an obvious microcrack toughening effect, so that the fracture toughness of the ceramic is improved.

The invention relates to the technical field of coating materials, in particular to a spontaneous perspiration thermal barrier composite coating and a preparation method thereof. The spontaneous sweating thermal barrier composite coating comprises a bonding layer, a thermal barrier layer and a sweating thermal barrier layer which are arranged in a stacked mode. The bonding layer comprises NiCoCrAlY and / or NiCoCrAlYX, and X is selected from one or more of Hf, Si and Ta; the thermal barrier layer is made of a composite ceramic material, the composite ceramic material is a multi-element rare earth oxide composite stable zirconia ceramic, and rare earth elements in the multi-element rare earth oxide are any two or more of La, Ce, Sc, Gd, Dy, Y or Yb; the sweating thermal barrier layer comprises the composite ceramic material and a metal sweating agent, and the metal sweating agent is Cu or Ni coated Cu metal micro powder. The spontaneous sweating thermal barrier composite coating provided by the invention has high bonding strength and excellent heat insulation and ablation resistance.

The invention provides zirconium oxide ceramic slurry and a preparation method thereof, a zirconium oxide ceramic product and a production method thereof. The zirconium oxide ceramic slurry comprises zirconium oxide powder and a resin component, the resin component comprises photosensitive resin, a photoinitiator, a linear polymer and a thermal initiator, and the preparation method comprises the following steps: mixing the photosensitive resin, the photoinitiator and the linear polymer for the first time to obtain a first resin liquid; sequentially carrying out stirring and second ball milling on the second mixed zirconium oxide powder and the first resin liquid to obtain first slurry, then adding a thermal initiator, and carrying out third ball milling to obtain second slurry; the second slurry is subjected to defoaming treatment, and the zirconia ceramic slurry is obtained. The density of the biscuit can be improved, then the sintering resistance of the product in the final sintering process is reduced, and the final sintering density and the mechanical property of the final product are improved.

The invention relates to the technical field of high-temperature alloy materials, and provides an N10276 profiled bar and a forming method thereof.The surface of a blank is coated with a three-layer composite sheath, the blank is heated in a partitioned and gradient mode, the temperature of a side wing plate area is 50-100 DEG C higher than that of a web plate area, the metal fluidity of a side wing plate is improved, cogging rolling, four-roller reciprocating finish rolling, partitioned and gradient cooling and secondary solution treatment are conducted, and the N10276 profiled bar is obtained. A nitric acid and hydrofluoric acid mixed solution is used for pickling and stripping the composite sheath, an oxide layer is removed, intergranular corrosion is avoided, a triple sheath synergistic protection mechanism is adopted, oxygen is physically isolated by outer stainless steel, and heat loss is inhibited by a middle yttria-stabilized zirconia ceramic fiber layer.

One aspect relates to a high-temperature sensor, having a coated substrate. The substrate contains a zirconium oxide or a zirconium oxide ceramic, at least one resistance structure and at least two connection contacts. The connection contacts electrically contact the resistance structure. The substrate is coated with an insulation layer. The insulation layer contains a metal oxide layer, the resistance structure and the free regions of the insulation layer, on which no resistance structure is arranged, are coated at least in regions with a ceramic intermediate layer, and a protective layer and / or a cover is arranged on the ceramic intermediate layer. At least one opening is formed in the insulation layer, which exposes at least sections of a surface of the substrate.

The invention relates to degradable ceramic body mud and a manufacturing method thereof, and belongs to the technical field of ceramics. Comprising the following steps: grinding, crushing and sieving calcined talc, wollastonite, phlogopite and yttria-stabilized zirconia, adding stearic acid and a carboxymethyl chitosan solution, carrying out ball-milling mixing, adding polyhydroxy citronellal and absolute ethyl alcohol in a nitrogen atmosphere, carrying out constant-temperature stirring, filtering out a solvent, drying, adding isobutanol and an aluminum-zirconium coupling agent, continuously stirring, and carrying out vacuum drying to obtain the modified yttria-stabilized zirconia ceramic. And filtering, washing, carrying out vacuum drying, adding a binder and deionized water, stirring, standing, carrying out compression molding, carrying out vacuum drying, and calcining. Polyvinyl alcohol is selected as a green binder, the excellent binding characteristic of the polyvinyl alcohol enhances the forming efficiency of the slurry, the slurry is harmless to the environment, polyhydroxy citronellal and carboxymethyl chitosan enhance the modification and uniform dispersion of the stone surface, and then the microstructure of the material is improved. And the environment-friendly dispersing agent and the binder are added, so that the environmental pollution is reduced, and the performance and green ecology are improved.

The invention relates to the technical field of dental repair materials, in particular to a nano zirconia ceramic material for dental repair and a preparation method thereof. The preparation method comprises the following steps: S1, preparing nano zirconium oxide powder; s2, preparing composite spherical powder; s3, preparing a green body; and S4, high-temperature sintering: unpacking the hot-pressed green body, and performing high-temperature sintering to obtain the nano zirconia ceramic material for dental restoration. According to the present invention, the mechanical property, the biocompatibility, the antibacterial property, the aesthetic property and the like of the prepared nano-zirconia ceramic material for dental restoration are comprehensively improved through a variety of modification means and optimization processes, and the prepared nano-zirconia ceramic material becomes the ideal dental restoration material.

The invention discloses a composite zirconia ceramic microbead and a preparation method thereof, and belongs to the technical field of zirconia ceramic microbeads. The composite zirconium oxide ceramic microbeads are prepared from 75-85 parts by mass of yttrium-stabilized tetragonal phase zirconium oxide, 15-25 parts by mass of aluminum oxide, 0.2-1 part by mass of silicon dioxide, 0.2-0.5 part by mass of magnesium oxide and 2-5 parts by mass of modified silicon nitride. According to the invention, yttrium-stabilized tetragonal phase zirconium oxide is taken as a base material, aluminum oxide and modified silicon nitride are supplemented, the overall wear resistance is improved by utilizing the high hardness of aluminum oxide and the good binding property of modified silicon nitride in the formula, and the result shows that the addition of modified silicon nitride is beneficial to formation of a uniform and compact microstructure and can reduce the probability of falling of crystal grains; therefore, the grinding of the microbeads is reduced. The prepared composite zirconia ceramic microbead is high in hardness, low in self-abrasion, wide in raw material source, simple in preparation method and good in market prospect.

The utility model discloses a zirconia ceramic processing auxiliary device, and relates to the technical field of zirconia ceramic processing. The cutting device comprises a workbench, the top of the workbench is fixedly connected with a fixing seat, the left side of the fixing seat is provided with an auxiliary assembly, the right side of the fixing seat is provided with a cutting device, the auxiliary assembly comprises an inclined plate, the bottom of the inclined plate is fixedly connected with a supporting plate, and the bottom of the supporting plate is fixedly connected with a fixing plate. According to the utility model, auxiliary components are arranged, specifically, zirconia ceramics are sequentially placed on an inclined plate, an electric push rod II is started to drive a push ring to move towards the right side, the push ring pushes the bottommost zirconia ceramics towards the right side, so that the zirconia ceramics are moved to a power roller, and then the push ring is reset; the zirconia ceramics on the upper portion roll to the position of the push ring, feeding on the lower side is facilitated, manual feeding of workers is not needed, the workers can keep a long distance from the cutter, and potential safety hazards are avoided.

The utility model discloses a zirconium oxide demoulding device which comprises a corner cylinder, a base arranged at the bottom of the corner cylinder, a lower mould base arranged at the top of the base on one side of the corner cylinder, an upper mould plate arranged at the top of the corner cylinder, a mounting groove arranged at the top of the lower mould base, and a lower mould core arranged at the top of the lower mould base through the mounting groove, a demolding hole is formed in the bottom of the lower mold core, a demolding mechanism is arranged in the lower mold base at the bottom of the lower mold core, an upper mold core is arranged at the bottom of the upper mold plate, and an injection mechanism is arranged at the top of the upper mold plate and connected with the upper mold core. According to the utility model, the lifting and rotation of the upper template are realized by arranging a series of structures and the corner cylinder, so that the mold closing and opening operations between the upper template and the lower mold base are facilitated, the upper template is prevented from hindering the demolding of the zirconium oxide porcelain block, namely, the demolding operation space is large, the automatic ejection and demolding of the zirconium oxide porcelain block by the mold are realized, and the production efficiency is improved. And in combination with the demolding space provided by the corner cylinder, complete ejection demolding can be realized, and demolding operation is simple and convenient.

The invention discloses a preparation method and application of zirconia ceramics, and relates to the technical field of zirconia ceramics, and the preparation method comprises the following steps: mixing 100-200nm nano zirconia, 200nm-400nm alumina, a binder, an emulsifier and a dispersant, adopting a high-purity alumina grinding ball as a grinding medium, stirring and grinding for 4-8 hours at a rotating speed of 700-1000r / min, and then grinding for 1-2 hours at a sanding rotating speed of 1500-2000r / min, so as to obtain the zirconia ceramics. Mixed slurry is obtained; carrying out spray granulation on the mixed slurry; the components of the zirconia ceramic are mixed and granulated, Fe3Al is deposited on the surface of the composite ATZ powder in a magnetron sputtering mode, the uniform dispersion effect and binding force of the composite powder are guaranteed, and meanwhile, due to the fact that the composite powder has a similar thermal expansion coefficient with zirconia, the composite powder has good thermal expansion performance under the condition that the fracture toughness, strength and hardness of the composite powder are not sacrificed. The low-temperature thermal shock resistance of the zirconia ceramic is improved, the stability of the zirconia ceramic bearing is ensured, and the thermal shock resistance and strength of the ceramic are remarkably improved compared with a traditional mixed powder preparation process.

The invention belongs to the field of dental implants, and particularly relates to a preparation method and device of a zirconium oxide implant surface osteogenesis-promoting and antibacterial zinc phosphate coating, and the preparation method of the zinc phosphate coating comprises the following steps: S4, mixing zinc oxide, phosphoric acid, nitric acid and deionized water, and adding an additive to prepare a phosphating solution; s5, putting the phosphating solution and the zirconium oxide implant into a reaction kettle, heating the reaction kettle in a baking oven at 150-230 DEG C for 3-12 hours, and taking out the zirconium oxide implant after natural cooling; and S6, carrying out ultrasonic cleaning for 1-5 minutes by adopting deionized water, and drying in a drying oven at 40-60 DEG C to finally obtain the zirconium oxide implant coated with the zinc phosphate coating. The zinc phosphate coating is prepared on the surface of the zirconium oxide dental implant by applying a hydrothermal method, and the zirconium oxide dental implant has good mechanical properties, cytocompatibility, osteogenesis performance and antibacterial performance by changing the formula of a phosphating solution and adjusting the temperature and time of a hydrothermal reaction, and has important significance for expanding clinical application of a zirconium oxide ceramic implant material in the field of oral cavities.

The invention relates to a zirconia ceramic pump body deep hole nanoscale honing process and honing head, and the zirconia ceramic pump body deep hole nanoscale honing process comprises the steps that a composite honing head with a coarse grinding section and a fine grinding section is adopted, and a preset gradient machining process is executed on a target zirconia ceramic pump body; according to the zirconia ceramic pump body deep hole nanoscale honing process and the composite honing head, the gradient machining process is combined with the design of the composite honing head, machining parameters, cooling liquid types and temperature control strategies are dynamically adjusted at different stages, the whole process optimization from rough machining to superfinishing is achieved, and the machining efficiency is improved. The method has the effects of improving the machining efficiency, reducing surface defects and avoiding thermal stress cracks.

The invention provides a rapid sintering method of zirconia ceramic for dentistry and zirconia ceramic, the rapid sintering method of zirconia ceramic for dentistry comprises the following steps: obtaining a pre-sintered body prepared from zirconia powder with stable yttrium oxide, and obtaining a standard active sintering temperature of the zirconia powder; the pre-sintered body is subjected to final sintering in a preset final sintering stage, the zirconia ceramic is obtained, the preset highest sintering temperature in the preset final sintering stage is higher than the standard active sintering temperature, and the difference value between the preset highest sintering temperature and the standard active sintering temperature ranges from 10 DEG C to 60 DEG C. According to the embodiment of the invention, the preset highest sintering temperature in the preset final sintering stage is set to exceed the standard active sintering temperature by 10-60 DEG C, so that the highest sintering temperature of the final sintering process is improved, the final sintering time of the zirconia ceramic is shortened, the production efficiency of the zirconia ceramic product is improved, and the production cost is reduced. And meanwhile, the material can obtain excellent mechanical properties and transparency within an extremely short time.

The invention discloses a zirconia composite ceramic microbead and a preparation method thereof, and belongs to the technical field of zirconia ceramic microbeads. The zirconia composite ceramic microbeads are prepared from 80-90 parts by mass of yttrium-stabilized tetragonal phase zirconia powder, 5-10 parts by mass of alumina powder and 5-10 parts by mass of silicon carbide composite powder. Yttrium-stabilized tetragonal phase zirconia is used as a basic material, alumina and polycrystalline multi-granularity silicon carbide composite powder are used as auxiliary materials, the silicon carbide powder with high wear resistance and high corrosion resistance is used for improving the overall wear resistance and corrosion resistance of the composite ceramic microbead, and after the silicon carbide composite powder is added, the Vickers hardness and strength of the zirconia composite ceramic microbead are obviously improved; and the wear rate is greatly reduced, and the mass loss rate after strong acid solution soaking is greatly reduced. The prepared zirconium oxide composite ceramic microbead is excellent in wear resistance and good in corrosion resistance, meanwhile, the raw materials are wide in source, the preparation method is simple, and the good market prospect is achieved.

The invention relates to the technical field of ceramic mobile phone rear cover processing, in particular to a zirconium oxide ceramic mobile phone rear cover processing technology which comprises the steps that S1, polylactic acid and a hydroxyl silane coupling agent are dissolved in an organic solvent, zirconium oxide powder is added, the temperature is increased to 40-50 DEG C, ultrasonic treatment, filtering and drying are conducted, and pretreated zirconium oxide powder is obtained; s2, banburying the pretreated zirconium oxide powder, zinc oxide, nano cellulose crystal, a first dispersant, a binder and a plasticizer to obtain a mixture; s3, performing dry pressing on the mixture by using a dry press, cooling, and performing isostatic pressing on the mixture in a static press to obtain a blank body; s4, the blank is subjected to glue discharging and sintering, and a ceramic body is obtained; s5, the CNC machine tool is used for conducting precision machining on the ceramic body so that the needed size and shape precision can be achieved; s6, a grinding machine and a polishing machine are sequentially used for conducting fine treatment on the surface of the ceramic body; and S7, carrying out beautifying treatment and anti-fingerprint treatment on the ceramic body subjected to surface treatment to obtain the ceramic mobile phone shell rear cover.

Disclosed are a colored zirconia ceramic and a method for manufacturing same. The disclosed colored zirconia ceramic is a ceramic made of zirconia or a zirconia-based solid solution containing aluminum as a solute, has excellent mechanical properties, and does not contain a pigment. The disclosed method for manufacturing the colored zirconia ceramic comprises: a first step for preparing composites; a second step for mixing the composites and producing a granulated mixture; a third step for compacting the granulated mixture to produce a compact; a fourth step for primarily heating the compact at 155-175°C for 30-40 hours and then secondarily heating the compact at 650-850°C for 30-40 hours to degrease and heat-treat the compact; a fifth step for pre-sintering the degreased and heat-treated compact at 1450-1550°C; and a sixth step for sintering the pre-sintered compact at a sintering temperature of 1550-1700°C in a vacuum at a pressure of 10-1 to 10-5 Torr.

The invention relates to the field of materials, and particularly discloses a mildew-proof and antistatic automobile trunk inner lining plate material and a preparation method thereof.The mildew-proof and antistatic automobile trunk inner lining plate material is prepared by adopting flax fibers, zirconia ceramic fibers and carbon fibers to be compounded to serve as a reinforcing framework, conducting vacuum drying and activation on the reinforcing framework, pretreating graphene oxide and dispersing the graphene oxide in a fiber network; according to the present invention, the mold inhibitor and the antibacterial agent are added to form the uniform and lasting release source of the mold inhibitor and the antibacterial agent, and the composite binder and the composite auxiliary agent are adopted, and the graded pressurization cold pressing molding process is adopted so as to compact the fiber network, effectively release the internal stress, and avoid the structural damage caused by the single high pressure so as to obtain the low-porosity and high-strength compact structure; the inner supporting plate material has efficient and broad-spectrum antibacterial performance and rapid and lasting static dissipation capacity, achieves the best balance among mechanical strength, durability, mildew-proof and antistatic performance and environmental protection performance, meets the application requirements of inner lining plates of automobile trunks, and has high practical application value.

The invention relates to the technical field of ceramic materials, in particular to a preparation method of submillimeter zirconia microspheres. The preparation method comprises the following steps: adding an isobutylene-maleic anhydride copolymer, butyl glycidyl ether and ammonium citrate into water, then adjusting the pH value of the solution to be alkaline by using an alkaline solution, and adding a defoaming agent and yttria-stabilized zirconia powder to obtain a premixed solution; carrying out ball milling on the premixed liquid, and then carrying out vacuum bubble removal to obtain zirconium oxide slurry; injecting the zirconium oxide slurry into an oily medium to obtain a zirconium oxide ceramic microbead green body; cleaning the zirconia ceramic microbead green body, drying, carrying out gradient heating calcination, and carrying out autogenous grinding to obtain the submillimeter zirconia microbead; the gel microspheres can be formed only by adding three organic matters, and the gel microspheres are low in organic matter content and free of toxicity. The method disclosed by the invention is high in yield, simple to operate and low in cost, and the prepared zirconium oxide microbeads are uniform in particle size and have relatively high density and mechanical properties.

The invention belongs to the technical field of ceramic materials, and discloses a zirconia ceramic containing nanofiber alumina and stabilized by yttrium oxide, the zirconia ceramic contains 3 mol% of Y2O3, the concentration of nanofiber Al2O3 in the composite ceramic is 0.95 vol%-1.9 vol%, and the sintering temperature is 1400-1500 DEG C. The invention also discloses a preparation method of the zirconia ceramic. The low-temperature hydrothermal aging resistance of the yttria-stabilized zirconia ceramic can be greatly improved by adding a proper range of nano-fiber alumina; the addition of a proper range of nanofiber alumina has no significant influence on the rheological properties of the yttrium oxide-stabilized zirconia ceramic, and the void ratio of the pressed zirconia ceramic is not greatly different from that of the zirconia ceramic not added with the nanofiber alumina.

According to the low-shrinkage 3D printing zirconia ceramic and the preparation process thereof, photosensitive polyimide is selected, the photosensitive polyimide has an imine ring and a photosensitive group on a macromolecular chain and has the advantages of excellent photosensitivity, thermal stability, low volume shrinkage and the like, a photoinitiator does not need to be added into a product system, and the preparation process is simple. Curing can be directly completed under ultraviolet irradiation, and the problems of ceramic shrinkage, cracking and the like caused by volatilization or decomposition of a photoinitiator in a workpiece during degreasing are avoided; the ratio of the dispersing agent to the plasticizer in the product system is optimized, the viscosity of the slurry is reduced, the solid content is increased, the shrinkage rate after sintering is reduced, and the flowability and the printing precision of the slurry are ensured. Besides, by combining a flash sintering treatment process, grain growth coarsening is inhibited, a nanoscale compact structure is realized, and internal defects are reduced, so that the zirconia ceramic prepared by the method has the advantages of no defect, compact structure, smaller grain size (smaller than 1 mu m), excellent fracture toughness and higher relative density.

The invention discloses a low-abrasion mesoporous zirconia ceramic for dental restoration and a preparation method thereof, the mesoporous zirconia ceramic is composed of tetragonal phase zirconia crystal particles and has a mesoporous structure, the mesoporous size is 30-50nm, and the porosity is 0.3-20%; the preparation method mainly comprises the following steps: preparing a ceramic green body by a ceramic concentrated suspension liquid curing technology and sintering the ceramic green body. According to the mesoporous zirconia ceramic disclosed by the invention, mesopores are introduced among ceramic crystal particles, and the size and content of the mesopores are accurately regulated and controlled, so that good wear resistance of the material is ensured, and meanwhile, low abrasion of the material is realized.

The invention discloses a titration zirconia ceramic microbead and a preparation process thereof, and mainly relates to the technical field of ceramic compositions taking zirconia as a base material. In the prior art, a zirconia ceramic microbead preparation process mainly comprises plastic extrusion forming, isostatic pressing forming and rolling forming, a traditional method is not completely suitable for batch production of zirconia ceramic microbeads with different particle sizes, the prepared microbeads have many internal structure defects, the structure uniformity cannot be guaranteed, and the defects of the prior art are overcome. The arrangement and combination mode of particles cannot be effectively controlled, so that the internal structure of the microbead is not uniform, and defects exist. Compared with the prior art, the titration method zirconia ceramic microbead preparation process provided by the invention can be suitable for batch production of large-particle-size and small-particle-size ceramic microbeads, pectin is taken as an adhesive, aluminum potassium sulfate is taken as a curing agent, pectin and aluminum potassium sulfate are subjected to a cross-linking reaction to generate gel, zirconia particles are wrapped in the gel, and the gel is cured to form zirconia gel beads; finally, the zirconium oxide ceramic microbeads with uniform internal structures and good wear resistance are obtained.

The invention discloses a preparation method and application of high-toughness anti-aging zirconia ceramic, and relates to the technical field of ceramic materials.The preparation method comprises the following steps that nano monoclinic zirconia with the D50 being 20-50 nm and the mass fraction being 99.7-99.8 wt%, aluminum oxide with the D50 being 200-400 nm and the mass fraction being 0.2-0.3 wt% and a dispersing agent are taken, and the dispersing agent accounts for 1-1.5 wt% of the total mass of powder; the preparation method comprises the following steps: by taking a high-purity aluminum oxide grinding ball as a grinding medium, stirring and grinding for 2-4 hours at the rotating speed of 700-1000r / min, and then grinding for 1-2 hours at the sanding rotating speed of 1500-2000r / min to obtain mixed slurry; nano monoclinic zirconia is adopted as a raw material, aluminum oxide and a dispersing agent are added for co-grinding, Y2O3 is deposited on the surface of ATZ composite powder in a magnetron sputtering mode, and a Y2O3 deposition layer can inhibit conversion from t-zirconia to m-zirconia, so that the anti-aging performance of the zirconia ceramic is improved, and the service life of the zirconia ceramic is prolonged. And the nano monoclinic zirconium oxide is directly mixed and ground with the aluminum oxide, so that the zirconium oxide raw material is more easily subjected to stress-induced phase change, and the toughness performance of the zirconium oxide ceramic is improved.