1346 results about "Zirconium oxide" patented technology

The invention relates to a zirconia-based all-ceramic false tooth and a preparation method thereof. A core layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 90 to 94 parts of ZrO2, 5 to 9 parts of Y2O3, 0.1 to 0.5 part of Al2O3, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2, and a shell layer of the zirconia-based all-ceramic false tooth is prepared from the following components in parts by mass: 24.5 to 49.5 parts of CaCO3, 45 to 50 parts of SiO2, 0 to 25 parts of MgO, 0.01 to 0.5 part of Fe2O3, 0.01 to 0.5 part of Er2O3 and 0 to 0.2 part of MnO2. The preparation process comprises the following steps: performing dry pressing and isostatic pressing on raw materials of the core layer, presintering, and carving to obtain a zirconia-based false tooth biscuit; meanwhile, calcining raw materials of a shell layer, then adding deionized water, a dispersing agent and an adhesive, and carrying out ball milling and mixing to obtain calcium-magnesium-silicon-based ceramic slurry; and coating the calcium-magnesium-silicon-based ceramic slurry on the surface of the zirconium oxide-based false tooth biscuit, and sintering to obtain the zirconium oxide-based all-ceramic false tooth provided by the invention. The zirconia-based all-ceramic false tooth has good jade texture and is closer to the natural color of natural teeth.

The invention relates to the technical field of biomedical ceramic materials, in particular to a zirconia-based biomedical ceramic material and a preparation method thereof.The preparation method comprises the following steps: preparing a zirconia-based biomedical ceramic material on the basis of preset opening degrees of air channels of a first heating part and a second heating part in a heating assembly and a preset working state of a first stirring structure; synchronously and continuously adding a plurality of to-be-reacted substances into the first space of the container for primary reaction; after the interval is fixed, opening a circulation channel based on a preset liquid channel opening degree of the circulation channel of the first space and the second space of the container, so that the material in the first space flows into the second space, and performing a second-section reaction at a preset second temperature and a preset rotating speed of a second stirring structure to generate a precipitate; according to the invention, the materials to be reacted can be heated at a stepped temperature, and the reaction process is fully adjusted according to the ion concentration and uniformity in the detected solution, so that the high-precision preparation of the zirconium oxide-based biomedical ceramic material is stably and efficiently carried out.

The invention relates to the technical field of rare earth metal electrolysis cathode protection coatings, in particular to a high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating on the surface of a tungsten cathode. A metallurgically bonded strong bonding bottom layer is constructed on a tungsten substrate through surface pretreatment and reactive sintering, then an atmosphere plasma technology is adopted to spray a creep-resistant gradient layer with continuous components to buffer thermal stress, and finally a sol-gel technology is utilized to construct an extremely compact corrosion-resistant surface layer in a superposition mode. The high-temperature-corrosion-resistant yttrium-stabilized zirconia gradient coating is constructed through a multi-scale and multi-mechanism synergistic effect, the problems that a tungsten cathode coating is insufficient in binding force and poor in thermal shock resistance are fundamentally solved, molten salt permeation can be blocked, and the service life of a tungsten cathode in a severe environment is remarkably prolonged.

The invention discloses a high-refractive-index nano-composite optical adhesive and a preparation method thereof, and belongs to the technical field of optical transparent adhesives. The optical adhesive is prepared by taking a polyurethane acrylate oligomer with a specific structure as matrix resin, introducing surface-modified barium titanate and zirconium oxide core-shell nanoparticles as a functional filler, and matching with an active diluent, a photoinitiator and a silane coupling agent in a specific proportion. Through the design of the core-shell structure, the core problems that the high-refractive-index nanoparticles are easy to agglomerate in an organic resin matrix, the dispersion stability is poor and the bonding force with a matrix interface is weak are effectively solved. The prepared optical adhesive has a refractive index of more than 1.65, a light transmittance of more than 99% and a haze of less than 0.3% after being cured, has excellent bonding strength, weather resistance and long-term use stability, and is especially suitable for precise lamination of high-end display devices (such as OLEDs (Organic Light Emitting Diodes) and micro-lens arrays).

The invention relates to the technical field of refractory materials, in particular to a waste magnesia-calcium brick-containing refractory material and a preparation method thereof, and the waste magnesia-calcium brick-containing refractory material comprises the following components: composite aggregate, calcium aluminate cement, urea resin-aluminum dihydrogen phosphate, active alpha-Al2O3 micro powder, silica micro powder and sodium tripolyphosphate. In the room-temperature spraying maintenance and low-temperature working stage, hydration of free CaO in the waste magnesia-calcium bricks and erosion of OH <-> are prevented through the hydrophobic effect of fluorinated polyphosphazene and modified zirconium oxide sol, and the compatibility and wettability of the composite aggregate and cement paste are improved through carboxylic acid groups of carboxyethyl silanetriol and polyethylene glycol monomethyl ether. According to the present invention, with the temperature rising, the aluminum dihydrogen phosphate forms the viscous liquid phase to wrap the aggregate so as to provide the temporary protection, the temperature continues to rise, the zirconium oxide and the nanometer Al2O3 react with the CaO and the MgO to generate the CaZrO3 and the MgAl2O3, the aluminum dihydrogen phosphate reacts with the nanometer Al2O3 in the system to generate the AlPO4, and the CaZrO3, the MgAl2O3 and the AlPO4 form the multi-phase fire-resistant structure so as to further improve the fire resistance of the fire-resistant material;

The invention discloses a synergistic phase change reinforced dental zirconia material and a preparation method and application thereof, and relates to the technical field of ceramic materials.The preparation method comprises the following steps that a zirconium oxychloride solution and a polyvinyl alcohol solution are mixed, dried and then subjected to heat treatment, and ZrC ceramic powder is obtained; then mixing with yttria-stabilized zirconia (Y-PSZ) to obtain composite powder; the composite powder is subjected to hot pressing sintering and cooling, and a pre-sintered body is obtained; introducing Ar-O2 mixed gas, and carrying out controllable oxidation to obtain an oxidation phase change reinforced pre-sintered body; and carrying out high-temperature sintering to obtain the synergistic phase change reinforced dental zirconia material. The invention further discloses the synergistic phase change reinforced dental zirconia material and application of the synergistic phase change reinforced dental zirconia material in preparation of dental products. According to the method, ZrC is introduced, and a pressure stress field formed by crystal transformation in ZrC oxidation and high-temperature sintering processes is utilized, so that the yttrium oxide stabilized zirconia dental ceramic is strengthened, and the mechanical strength of the yttrium oxide stabilized zirconia dental ceramic is remarkably improved.

The invention relates to preparation of a ZTA composite ceramic material, and belongs to the field of inorganic nonmetal composite materials. The raw material composition formula comprises aluminum oxide, zirconium oxide, zirconium dioxide, yttrium oxide, magnesium oxide and titanium dioxide. The low-sodium microcrystalline alumina powder with the original grain size of 0.40 [mu] m is selected and ground to the original grain size in advance, so that zirconia can be more uniformly distributed between alumina grain boundaries, which is a precondition for obtaining more uniform ZTA. Zirconium dioxide is creatively introduced, and compared with a conventional method in which stable zirconium oxide is directly used, the cost of ZTA is greatly reduced. The pre-calcined granulation powder is adopted, so that a ZTA product which is uniformly mixed in the early stage is cured by adding a stabilizer, and then the uniform and stable ZTA ceramic can be obtained through later-stage forming and firing.

The invention belongs to the technical field of ceramic materials, and particularly discloses whisker toughened zirconium oxide-aluminum oxide composite ceramic and an additive manufacturing method thereof, the composite ceramic comprises the following components by mass: 94 parts of zirconium oxide toughened aluminum oxide ceramic and 5 parts of silicon carbide whisker; the zirconium oxide toughened aluminum oxide ceramic is prepared from the following components in parts by mass: 76 parts of aluminum oxide and 24 parts of zirconium oxide, and 3mol% of yttrium oxide is added into the zirconium oxide. According to the whisker toughened zirconium oxide-aluminum oxide composite ceramic and the additive manufacturing method thereof, the preparation method has unique design of components and process, and the preparation of a high-density and high-performance ceramic-based composite material part based on a fused deposition modeling technology is successfully realized. Further, the prepared silicon carbide whisker toughened zirconium oxide-aluminum oxide-based composite ceramic has relatively high density and excellent obdurability.

The invention relates to a renewable industrial flue gas carbon dioxide adsorbent and a preparation method thereof. The method comprises the following steps: S1, mixing alkali metal, an aluminum oxide precursor, silicon oxide and a first solvent, or mixing an alkali metal solution, the aluminum oxide precursor, the silicon oxide and an optional second solvent, and then molding the mixed material to obtain microsphere particles; s2, mixing the microsphere particles and organic amine, and carrying out first loading treatment and drying treatment to obtain an organic amine loaded material; s3, roasting the organic amine-loaded material, mixing the obtained roasted material with a carrier material, and carrying out second loading treatment, so as to obtain the carbon dioxide adsorbent, the carrier material is selected from at least one of polystyrene-polyacrylic acid-polyethylene oxide, polymethyl methacrylate-b-polystyrene, zirconium oxide and a porous ceramic material. The carbon dioxide adsorbent is relatively high in adsorption capacity and relatively good in selectivity, reproducibility and stability; and large-scale industrial production and application are facilitated.

The invention belongs to the technical field of ceramic slurry, and particularly relates to ceramic slurry and a preparation method and application thereof.The ceramic slurry comprises inorganic components and organic components, the inorganic components comprise inorganic additives and glass powder, the inorganic additives comprise Al2O3, ZrO2 and Y2O3, and the organic components comprise modified acrylic resin, organic solvent and auxiliaries. By controlling the relative content of carboxyl and ester groups in the modified acrylic resin and utilizing the polarity difference of functional groups, selective adsorption of inorganic powder is realized, so that the dispersion uniformity of the powder in the ceramic slurry is remarkably improved, segregation of yttrium oxide is effectively inhibited, and the service life of the ceramic slurry is prolonged. Therefore, monoclinic-phase zirconium oxide, tetragonal-phase zirconium oxide and cubic-phase zirconium oxide with a proper proportion can be formed in the sintered ceramic substrate, further the bending strength of the ceramic substrate is remarkably improved, and the ceramic substrate is particularly suitable for manufacturing miniaturized and thin electronic components.

The invention provides a PCBN composite material and a preparation method thereof.The preparation method comprises the steps that two or more of zirconium oxide, titanium nitride, silicon nitride, titanium diboride, silicon carbide, titanium carbide, titanium carbonitride, aluminum oxide and aluminum nitride are mixed, and ceramic composite powder is prepared; the CBN micro powder and a metal binding agent are subjected to ball milling and mixing, and CBN pre-composite micro powder is prepared; mixing the CBN pre-composite micro powder with the ceramic composite powder to obtain a premix, placing the premix in a mold for pre-pressing to obtain a blank piece, and then assembling the blank piece for sintering to obtain a PCBN composite material; the mass percentage content of the ceramic composite powder is 5%-40%, the mass percentage content of the metal binding agent is 15%-30%, and the mass percentage content of the CBN micro powder is 45%-65%. According to the method, the toughness and the stability of the PCBN cutter can be improved on the premise of low content of CBN (Cubic Boron Nitride).

The invention belongs to the technical field of tungsten alloy, and particularly discloses a tungsten alloy electrode material and a preparation method thereof.The tungsten alloy electrode material comprises, by weight, 0.1%-0.2% of lanthanum boride, 0.2%-0.5% of zirconium oxide, 0.2%-0.6% of boron carbide, 0.4%-0.8% of cerium oxide, 0.5%-1.2% of tantalum carbide, 1.4%-1.8% of modified carbon nanotubes and the balance tungsten powder. The lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes are added into the tungsten powder, under the combined action of the lanthanum boride, the zirconium oxide, the boron carbide, the cerium oxide, the tantalum carbide and the modified carbon nanotubes, the tensile strength and the electrical conductivity are effectively improved, and the high-temperature stability tungsten powder has excellent high-temperature stability and wide application prospects.

The invention relates to the technical field of battery materials, in particular to a para-aramid lithium battery diaphragm and a preparation method thereof. The para-aramid lithium battery diaphragm comprises para-aramid slurry and a base membrane, the para-aramid slurry is coated on the two sides of the base membrane to form para-aramid coatings, and the para-aramid slurry comprises the following raw materials in parts by weight: 20-40 parts of modified para-aramid polymer liquid, 10-20 parts of nano ceramic composite material powder and 10-18 parts of a solvent; the nano ceramic composite material powder is prepared from the following raw materials in parts by weight: 50 to 100 parts of nano aluminum oxide, 8 to 12 parts of nano zirconium dioxide, 0.3 to 0.8 part of yttrium oxide, 1 to 5 parts of magnesium nitrate hexahydrate, 0.1 to 1 part of polyacrylic acid, 1 to 2 parts of ammonia water, 1 to 3 parts of coupling agent and 20 to 30 parts of silicon dioxide; the nano ceramic composite material powder is added into the para-aramid slurry, so that the para-aramid diaphragm has better thermal stability, and the phenomenon of thermal shrinkage of the diaphragm at high temperature is reduced.

The invention provides a refractory ceramic-based material for a smelting furnace lining and a preparation method of the refractory ceramic-based material, and belongs to the technical field of ceramic refractory materials. The material comprises coated modified fused magnesite main aggregate, ceramic sand main aggregate, surface coated magnesium oxide fine powder, gamma-phase aluminum oxide micro powder, an aluminum dihydrogen phosphate solution, alkaline silica sol, a pre-reaction spinel precursor and zirconium boride micro powder. The coated modified fused magnesite main aggregate is prepared by mixing and sintering fused magnesite, silicon carbide composite powder, chromium sesquioxide powder and phenolic resin powder. And mixing the silicon carbide powder and the magnesium oxide powder, and depositing a silicon nitride layer on the particle surface to prepare the silicon carbide composite powder. The surface-coated magnesium oxide fine powder is formed by coating the surfaces of magnesium oxide fine powder particles with aluminum oxide. The pre-reaction spinel precursor is prepared by the following steps: preparing a mixed salt solution from magnesium nitrate hexahydrate and aluminum nitrate nonahydrate by using deionized water, reacting, aging and carrying out heat treatment. And the ceramic sand main aggregate is made of zirconium oxide. And all the layers are matched for use to realize balanced improvement of performance.

The invention discloses a sintering method spherical mullite-zirconium oxide composite high-temperature kiln lining material, and belongs to the technical field of high-temperature-resistant materials. Mesoporous spherical mullite particles are used as a matrix, zirconium oxide hollow fibers are used as a reinforcing phase, the material is prepared by sintering, and the material belongs to an advanced inorganic non-metallic material, belongs to a fireproof and heat-insulating special brick and tile material, and is suitable for equipment such as energy-saving smelting furnaces and high-temperature kilns. The mesoporous spherical mullite particles are matched with the zirconium oxide hollow fibers, so that the apparent porosity of the material is greatly improved, and the volume density and the heat conductivity coefficient of the material are reduced; and the strength of the material is remarkably enhanced through the zirconium oxide hollow fibers.

The invention relates to the field of suspension plasma spraying, in particular to a long-service-life suspension plasma spraying thermal barrier coating based on a platinum-aluminum coating and a preparation method of the long-service-life suspension plasma spraying thermal barrier coating. The preparation method comprises the following steps: preparing a vertical crack or columnar-like structure ceramic layer on the surface of a platinum modified aluminide bonding layer with lower roughness by using suspension slurry prepared from fully-stable tetragonal phase yttrium oxide stabilized zirconium oxide powder and adopting suspension plasma spraying suspension, so as to obtain a thermal barrier coating system with long service life. The problems that in the prior art, due to stress existing between a ceramic layer prepared through plasma spraying and a low-roughness platinum modified aluminide bonding layer, cracks are continuously formed and expanded at an interface, and the service life of a thermal barrier coating system is short are solved. The long-life thermal barrier coating system can be prepared on the platinum modified aluminide bonding layer through suspension plasma spraying.

The invention discloses an anti-sticking coating of a graphite boat plate for hard alloy sintering as well as a preparation method and application of the anti-sticking coating, the anti-sticking coating comprises zirconium oxide, rare earth oxide and a cobalt corrosion resistant phase, and the ratio of the zirconium oxide to the rare earth oxide to the cobalt corrosion resistant phase in the anti-sticking coating is (10-20%): (60-80%): (10-20%); the rare earth oxide can maintain zirconium oxide in a stable tetragonal phase in the sintering process and the cooling process, it is guaranteed that a sample does not have phase change, the cobalt corrosion resisting phase can resist corrosion of cobalt steam in the compact sintering process, the anti-sticking coating can balance the difference value of the thermal expansion coefficient of the coating and the thermal expansion coefficient of the graphite surface, and therefore the quality of the compact is improved. Stress generated in the heating or cooling process is reduced, the coating is prevented from cracking, and the service life of the boat is prolonged; and the coating structure is fixed, powder does not need to be replaced in the spraying process, and the spraying efficiency is improved.

The invention provides porous alumina ceramic and a preparation method thereof, and relates to the technical field of ceramic materials. The invention relates to a preparation method of porous alumina ceramic. The preparation method comprises the following steps: dispersing alpha-cellulose powder in deionized water to form a cellulose suspension; stirring to fully swell the cellulose and form uniform gel, and freeze-drying to obtain a template; dissolving aluminum nitrate hexahydrate, magnesium nitrate hexahydrate and yttrium nitrate hexahydrate in absolute ethyl alcohol to obtain a precursor solution; putting gamma-Al2O3 micro powder and ammonium fluoride into a ball milling tank, adding the precursor solution and a dispersing agent, adding zirconium oxide balls and absolute ethyl alcohol into the ball milling tank, and performing ball milling to obtain ceramic slurry; dipping a template into the ceramic slurry, and performing dipping treatment under a vacuum condition to form a composite green body; and sintering to obtain the porous alumina ceramic. According to the porous aluminum oxide ceramic, the process stability is improved, and the problem that the strength is sharply reduced when the porosity is too high is solved.

The invention provides core-shell structure reinforced white carbon black / graphene oxide hybridized glass-lined porcelain glaze and a preparation method thereof. The porcelain glaze is composed of a basic glaze material and a core-shell structure hybrid reinforcement phase dispersed in the basic glaze material, the reinforcement phase takes white carbon black as a core and zirconium oxide as a shell, and a three-dimensional hybrid network formed by KH-560 grafted cellulose nanocrystals or carbon nanotubes and graphene oxide is constructed between the core and the shell. The preparation method mainly comprises the following steps: carrying out pre-dispersion and in-situ hybridization on the white carbon black, the graphene oxide and the one-dimensional nanofibers through a silane coupling agent; constructing a three-dimensional network under a catalytic condition by using a sol-gel method; a stable core-shell structure is formed through a deposition reaction of zirconium sol; finally, the obtained composite slurry is compounded with basic glaze with specific components, rapid densification is achieved through microwave sintering, and the product is particularly suitable for chemical reaction kettle glass lining with strict requirements for corrosion resistance and impact resistance.

The invention relates to a thermal barrier coating with composite vertical crack collaborative design and a preparation method, and belongs to the technical field of thermal barrier coatings. The coating is composed of a nickel-based high-temperature alloy matrix, an MCrAlY bonding layer, a YSZ first ceramic layer and a multi-element rare earth doped zirconium oxide second ceramic layer containing composite vertical cracks. The second ceramic layer is provided with a penetrating type (the depth is 100%) and non-penetrating type (the depth is 60%-80%) composite crack structure, and preparation can be accurately regulated and controlled by optimizing atmospheric plasma spraying process parameters (such as the preheating temperature of a base body, the powder feeding rate and the moving speed of a spray gun) and controlling the process. According to the double-ceramic-layer thermal barrier coating with the composite vertical crack structure, thermal stress release of the coating can be remarkably improved through collaborative design of the crack structure and material optimization, the thermal shock life can be prolonged by nearly two times at the temperature of 1300 DEG C, CMAS molten salt permeation is effectively inhibited, and excellent heat insulation performance and long-term service stability are achieved.

The invention discloses a non-oriented silicon steel composite material and a preparation method thereof.The method comprises the steps that powder of Ce, La and Y elements is subjected to ball milling, and ground powder with the particle size smaller than or equal to 8 micrometers is obtained; adding 0.5-1.2 wt% of nano TiO2 as a modifier into the ground powder, and uniformly depositing a rare earth composite layer on the surface of a non-oriented silicon steel substrate by adopting a magnetron sputtering method to obtain a silicon steel plate; stacking the multiple layers of silicon steel plates to form a laminated layer; zirconia sol is coated on interlayer contact surfaces of the multiple layers of silicon steel plates; standing at a preset temperature for a preset period of time, so that gelation-dehydration-inorganic conversion of the zirconium oxide sol layer is completed, and an assembled silicon steel plate is obtained; and carrying out post-treatment on the assembled silicon steel plate to obtain the non-oriented silicon steel composite material. The magnetic performance, the mechanical toughness and the low-temperature service reliability of the non-oriented silicon steel material are improved.

The application provides a temperature self-compensation strain sensor sensitive layer composite material and a preparation method thereof, and belongs to the technical field of functional materials. The composite material is prepared from raw materials including the following mass percentages: metal nanoparticles 25-35%, insulating oxide nanoparticles 2-3%, dispersing agent 0.1-0.5%, and the balance solvent; the metal nanoparticles have a positive temperature coefficient of resistance; and the insulating oxide nanoparticles include aluminum oxide nanoparticles, silicon oxide nanoparticles, zirconium oxide nanoparticles or chromium oxide nanoparticles. The composite material provided by the application can be used as a sensitive layer of a temperature self-compensation strain sensor, can avoid strain signal disturbance caused by environmental temperature changes, can make the strain sensor have a temperature self-compensation function, and can further simplify the system of the strain sensor without using an external circuit and without changing the size and structure of the strain sensor.

Disclosed is a chamber component of a processing chamber, the chamber component comprising a body and a coating on at least one surface of the body. The coating comprises about 89 mol % to about 93 mol % Y2O3 and about 7 mol % to about 11 mol % ZrO2. The coating has a hardness of about 1-50 GPa.

The invention relates to the technical field of surface modification, in particular to a preparation method of silicon carbide modified powder. The ceramic material is characterized by comprising the following raw materials in parts by weight: 76-82 parts of silicon carbide powder, 8-12 parts of carbonyl nickel powder, 2-4 parts of aluminum powder, 0.5-1.2 parts of nano yttrium oxide, 2-4 parts of yttrium oxide stabilized zirconium oxide, 1-2 parts of a first additive, 1-2.5 parts of a second additive and 1-2.5 parts of a modified adhesive. Silicon dioxide generated by reaction of silicon hydroxyl on the surface of silicon carbide and oxygen is promoted by the first additive to uniformly deposit in particle gaps to form a continuous and compact initial oxide film, and meanwhile, the thermal expansion coefficient is between that of silicon dioxide and that of silicon carbide, so that the thermal stress difference between the silicon dioxide oxide film and a silicon carbide substrate is effectively buffered; the risk of film cracking caused by thermal expansion mismatch is reduced, and the oxidation resistance of the material is improved.

The invention relates to a composite coating for a graphite mold and a preparation method of the composite coating. The composite coating comprises an yttrium-stabilized zirconia layer, a transition layer containing yttrium-stabilized zirconia and boron nitride and a boron nitride layer which are sequentially arranged from the inner surface of the graphite mold to the outside. The composite coating provided by the invention can reduce the cooling speed of a melt on a contact interface with the mold in the casting process, reduce the occurrence of cold shut, prolong the service life of the graphite mold and reduce the demolding resistance.

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.

The invention discloses a preparation method of a zirconium oxide toughened aluminum oxide ceramic substrate, which comprises the following steps: respectively carrying out surface modification on aluminum oxide powder and zirconium oxide powder by adopting a coupling agent, a catalyst and a cross-linking agent, then mixing the two modified powder with a rare earth sintering aid, a dispersing agent, a binder and a plasticizer, and carrying out ball milling treatment, thereby obtaining the zirconium oxide toughened aluminum oxide ceramic substrate. Carrying out tape casting and sintering processes to obtain a target ceramic substrate; the preparation method is simple, the process is easy to control, the bending strength of the prepared zirconium oxide toughened aluminum oxide ceramic substrate can reach 847 MPa at most, and the fracture toughness can reach 7.6 MPa.m < 1 / 2 > at most.

The invention discloses lithium-free high-heat-resistance ceramic pug and a preparation method thereof, and relates to the technical field of ceramic materials. When the lithium-free high-heat-resistance ceramic pug is prepared, aluminum oxide reacts with 3-(2, 3-epoxypropoxy) propyltrimethoxysilane to prepare pre-modified aluminum oxide; reacting the pre-modified aluminum oxide with starch to obtain modified aluminum oxide; mixing ethyl acetoacetate, isopropanol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide to prepare a spinning solution, performing electrostatic spinning, and then immersing the spinning solution into the yttrium oxide sol to prepare aluminum oxide-zirconium oxide-yttrium oxide composite fibers; stirring and mixing the modified aluminum oxide, talc, aluminum oxide-zirconium oxide-yttrium oxide fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water, and performing vacuum pugging to obtain the lithium-free high-heat-resistance ceramic pug. The lithium-free high-heat-resistance ceramic pug prepared by the invention has good thermal shock resistance and bending strength after being sintered.

The present application relates to the technical field of target material, in particular to a preparation method of high-density tin-zinc-zirconium oxide target material. The preparation method comprises the following steps: preparing tin oxide powder, zirconium oxide powder and zinc oxide powder into a mixed slurry, and then performing sand milling, granulation, molding, sintering to obtain the high-density tin-zinc-zirconium oxide target material, wherein the mass ratio of the tin oxide powder, the zirconium oxide powder and the zinc oxide powder is 100:0.1-0.5:9-11. The high-density tin-zinc-zirconium oxide target material prepared by the preparation method has high relative density and low resistivity, and the sputtered film thereof has high transmittance in the visible light range, can replace the traditional indium tin oxide target material, and can be widely applied in the fields of semiconductor integrated circuits, LEDs, displays, touch screens, solar photovoltaics and chemical industry.

The zirconium oxide ceramic modified by the graphene / zirconium oxide calcined composite microspheres is prepared from stable zirconium oxide powder A and the graphene / zirconium oxide calcined composite microspheres accounting for 25 wt% or below of the total ceramic powder through mixing, compression molding and sintering, the preparation method of the graphene / zirconium oxide calcined composite microspheres comprises the following steps: preparing stable zirconium oxide powder B, graphene and a solvent into slurry; and carrying out ball milling, spray drying and calcination to obtain the graphene / zirconium oxide calcined composite microspheres. According to the present invention, the graphene / zirconium oxide calcination composite microsphere and the SPS sintering are performed, such that the dispersed graphene / zirconium oxide two-phase structure region exists in the obtained zirconium oxide composite ceramic so as to consume the large amount of the crack growth energy, and the significant toughening effect is provided.