944 results about "Oxide ceramic" patented technology

The invention relates to the technical field of nano ceramic materials, and discloses a high-strength nano aluminum oxide ceramic product and a preparation process thereof.The preparation process comprises the following preparation steps that aluminum oxide powder, a composite binder, composite gel, a plasticizer and a solvent are mixed and subjected to ball milling, and composite slurry is obtained; placing the composite slurry in a mold, and performing mold pressing and drying to obtain a green body; and putting the green body into a high-temperature sintering furnace, carrying out high-temperature sintering, and cooling to room temperature to obtain the nano aluminum oxide ceramic product. Nano zirconium oxide and nano magnesium oxide are formed on the surfaces of the pretreated silicon carbide whiskers, and can form a solid solution with nano aluminum oxide in the sintering process to serve as a bridge of the silicon carbide whiskers and nano aluminum oxide particles, so that the binding force of the silicon carbide whiskers in a nano aluminum oxide ceramic matrix is remarkably enhanced; phosphoric acid and aluminum ammonium sulfate are firmly combined on the surfaces of nanometer aluminum oxide particles through carboxymethyl cellulose, and the situation that phosphoric acid and aluminum ammonium sulfate are not firmly combined with the nanometer aluminum oxide particles is avoided.

The invention relates to the technical field of electronic ceramic materials, and particularly discloses a high-purity aluminum oxide ceramic substrate and a preparation process thereof. The high-purity aluminum oxide ceramic substrate is prepared from the following raw materials in parts by weight: 0.20 to 0.25 part of magnesium oxide, 0.35 to 0.55 part of zirconium oxide, 1.2 to 1.5 parts of dispersing agent, 60 to 65 parts of ethanol, 99.7 to 99.8 parts of aluminum oxide, 12 to 15 parts of adhesive, 6 to 9 parts of plasticizer and 50 to 55 parts of n-butyl alcohol, the adhesive is a mixture of polyvinyl butyral, water glass and modified paraffin. The prepared high-purity aluminum oxide ceramic substrate has excellent chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has better density, mechanical property and thermal stability by mixing various raw material components, and is not easy to break when subjected to bending load.

The invention discloses reflection-heat insulation dual-functional aluminum oxide ceramic and a preparation method and application thereof.The method comprises the steps that after surface silanization treatment is conducted on nanoscale hollow oxide filler, surface-modified nanoscale hollow oxide filler is prepared; and then adding the surface-modified nanoscale hollow oxide filler into a high-molecular polymer and a mixed polar solvent to obtain the thermal insulation coating. The method comprises the following steps: coating the surface of aluminum oxide ceramic with a heat insulation coating to form a primary coating, and carrying out gradient heating curing to obtain aluminum oxide ceramic with a functionalized heat insulation coating; and coating the surface of the thermal insulation coating functionalized aluminum oxide ceramic with an infrared reflection coating, and carrying out annealing treatment in a nitrogen atmosphere to prepare the reflection-thermal insulation dual-functionalized aluminum oxide ceramic. By constructing a double-layer composite structure, enhancing interface thermal resistance through chemical bonding, directionally distributing the nanofiller and designing a low-radiation layer structure, heat conduction and radiation heat transfer of the aluminum oxide ceramic-based material are synergistically reduced, and the high-temperature heat insulation performance of the aluminum oxide ceramic-based material is improved.

The invention relates to the technical field of solid electrolyte, in particular to normal-temperature surface modified flexible oxide solid electrolyte and a preparation method and application thereof. The normal-temperature surface-modified flexible oxide solid electrolyte is prepared from the following raw materials: a monomer, polyethylene oxide, a solvent, an initiator, a modified oxide ceramic electrolyte and electrolyte salt, wherein the mass of the monomer is 1-10% of the total mass of the components; the molar ratio of the initiator to the monomer is 0.01%-0.1%; the molar ratio of the electrolyte salt to the monomer is 1: (6-12); the mass ratio of the electrolyte salt to the modified oxide ceramic electrolyte is 1: (2.5-5). The flexible oxide solid electrolyte has high conductivity, wide temperature tolerance range and high structural stability, and when the flexible oxide solid electrolyte is applied to an all-solid-state lithium metal battery, the ionic conductivity, safety and cycle performance of the battery are improved.

The invention discloses nanoscale high-entropy A2B2O7 type oxide ceramic powder and a preparation method of a nano ceramic block of the nanoscale high-entropy A2B2O7 type oxide ceramic powder, and the preparation method comprises the following steps: S1, uniformly dispersing a rare earth element source and a transition metal source in deionized water, stirring at room temperature, and then adding a polymerizing agent and an inducer to obtain a mixed solution; s2, continuously stirring at room temperature to form a transparent clear solution; s3, heating the transparent clarified solution until milk white gel is gradually formed; and S4, drying the milk white gel into dry gel. According to the nanoscale high-entropy A2B2O7 type oxide ceramic powder and the preparation method of the nano ceramic block of the nanoscale high-entropy A2B2O7 type oxide ceramic powder, discharge plasma sintering is combined with a two-step preparation process, the efficiency is high, sintering is compact, the grain size of a ceramic block material can be controlled, and the nano ceramic block can be used for preparing the nano-scale high-entropy A2B2O7 type oxide ceramic powder. And the synthesized oxide has the characteristics of fine powder particle size, uniform distribution, few impurities and the like, and the method is low in synthesis temperature and relatively low in cost.

The invention discloses a high-purity aluminum oxide ceramic substrate capable of being used for a Ka wave band and a preparation method of the high-purity aluminum oxide ceramic substrate, and relates to the field of ceramic substrates and preparation methods of the ceramic substrates. The ceramic substrate material is composed of a main body aluminum oxide and a composition, and the composition comprises a doping modifier and a part of aluminum oxide; the ratio of the doping modifier to part of aluminum oxide is 1: n; wherein 2 < = n < = 8; the composition accounts for less than or equal to 0.4% of the total amount of the ceramic substrate raw materials. According to the aluminum ceramic material, the doping modifier and part of aluminum oxide are pre-synthesized into a composition, the probability that aluminum oxide powder particles make contact with composition particles is increased, and the doping modification effect is improved. 1 part of doping modifier and n parts of aluminum oxide are uniformly mixed and pre-synthesized into a composition, so that the doping modification effect and the cooling effect are improved, and the combining capacity of composition particles and aluminum oxide particles in the subsequent synthesis process is enhanced.

The invention relates to the technical field of dispersing agents for ceramics, and discloses a preparation method of a dispersing agent for ceramics, and the novel dispersing agent for ceramics is prepared by taking methoxypolyethylene glycol, bromoacetyl bromide, 4-hydroxyphthalic anhydride, 2, 4, 6-diethanolamine amino-1, 3, 5-s-triazine and the like as raw materials. The polyether polyol contains a plurality of carboxyl groups, has strong interaction with the surface of ceramic powder such as aluminum oxide, has a star-shaped multi-arm polyether molecular chain, can well coat the aluminum oxide powder, can effectively inhibit the growth of crystal nucleus particle size of the aluminum oxide powder, reduces the particle size of the aluminum oxide, and avoids agglomeration and sedimentation of the aluminum oxide; the modified aluminum oxide ceramic powder has good activation degree in solvents such as water, ethanol, dichloromethane or N, N-dimethylformamide and the like, is lower in settling volume and shows excellent dispersing performance.

The invention belongs to the technical field of friction catalysis, and particularly relates to application of an aluminum oxide substrate in friction catalytic degradation of high-concentration organic dye wastewater, an aluminum oxide ceramic chip is used as a substrate, titanium dioxide nano powder is used as a catalyst, and the aluminum oxide ceramic chip is fixed at the bottom of a flat-bottom glass beaker; the method comprises the following steps: adding organic dye wastewater, a magnetic turntable and titanium dioxide nano powder into a flat-bottomed glass beaker, then putting the flat-bottomed glass beaker in a dark environment at room temperature, stirring and reacting on a magnetic stirrer for 90-150 minutes, and after the reaction is completed, completely degrading organic dye in the wastewater. According to the method, the aluminum oxide ceramic chip is added into a system for performing friction catalytic degradation on the organic dye wastewater by using the titanium dioxide nano powder as the substrate, so that the degradation rate of the organic dye is greatly improved, the complete degradation time of the organic dye is shortened, and a new thought is provided for performing friction catalytic degradation on the organic dye wastewater by using the titanium dioxide nano powder.

The invention discloses a preparation method of fine-grain aluminum oxide ceramics, and belongs to the technical field of electrostatic chucks, the preparation method comprises the following steps: powder pretreatment: dispersing nano aluminum oxide powder in a horizontal ball mill, adding a second-phase additive accounting for 1-10% of the total volume fraction, and uniformly stirring; mixing a second phase additive with a solvent, then adding a structure-directing agent PEG and a dispersing agent, carrying out ball milling in a planetary ball mill, and finally transferring the obtained solution into a vertical stirring mill for grinding; sol: firstly adding 60 parts of toluene, 20 parts of isopropanol and 20 parts of plasticizer into a pneumatic sol machine, and then adding 30-50 parts of adhesive; dispersing: weighing a certain amount of 3mm balls and a mixed solvent of methylbenzene and n-butyl alcohol into a stirring mill, then adding the pretreated nano aluminum oxide powder, and stirring; mixing: adding PVB colloid and transferring into a defoaming tank; vacuum defoaming: feeding the slurry in the roller ball mill into a defoaming tank by using N2 air pressure; and forming and sintering.

The utility model relates to the technical field of resistors, in particular to an anti-vulcanization moisture-resistant thick-film resistor. According to the technical scheme, the resistor comprises an aluminum oxide ceramic substrate, a resistor body is printed on the upper surface of the aluminum oxide ceramic substrate, front electrodes are printed at the two ends of the resistor body, extending parts of the two ends of the resistor body are covered with the front electrodes, back electrodes are printed on the lower surface of the aluminum oxide ceramic substrate, and the aluminum oxide ceramic substrate is provided with side electrodes. The front electrode, the back electrode and the side electrode are all silver electrodes, a nickel electrode is arranged outside the silver electrodes, a tin electrode is arranged outside the nickel electrode, and a first anti-vulcanization layer is arranged between the silver electrode and the nickel electrode at the two ends of the resistor body. A second anti-vulcanization layer is arranged between the nickel electrode and the tin electrode at the two ends of the resistor body, and a first protective layer and a second protective layer are arranged on the surface of the resistor body.

The invention relates to the technical field of brazing processes, in particular to a brazing process for connecting aluminum oxide ceramic and metallic titanium through low-activation brazing filler metal. According to the technical scheme, the method comprises the following steps that a to-be-welded face of the aluminum oxide ceramic is subjected to magnetron sputtering titanium film plating, the sputtering power ranges from 80 W to 150 W, the argon pressure ranges from 0.5 Pa to 1.5 Pa, the film thickness ranges from 0.5 micrometer to 5 micrometers, inert gas annealing treatment is conducted after film plating, the annealing temperature ranges from 400 DEG C to 550 DEG C, and the heat preservation time ranges from 10 min to 30 min; and the surface of the metal titanium substrate is subjected to laser micro-texture treatment, and a periodic groove structure with the depth being 10-50 microns is formed. The problems of poor wettability of the brazing filler metal and the ceramic, low joint strength and joint stress cracks are solved, meanwhile, radioactive substances generated by the brazing filler metal under the irradiation condition can be released within a short time, the equipment maintenance period is greatly shortened, and the equipment service life is prolonged.

The invention discloses an energy-saving environment-friendly spray granulation tower for aluminum oxide ceramic material processing, which comprises a bottom plate, a mixing barrel is fixedly mounted at the upper end of the bottom plate, a heating pipe is spirally wound on the outer side of the mixing barrel, a stirring assembly is arranged in an inner cavity of the mixing barrel, a granulation tower box is arranged at the rear end of the mixing barrel, and the granulation tower box is arranged in the inner cavity of the mixing barrel. And the lower end of the granulation tower box is fixedly connected with a collection hopper. According to the energy-saving and environment-friendly spray granulation tower for aluminum oxide ceramic material processing, by starting a driving motor, the output end of the driving motor drives a first stirring shaft to rotate, the first stirring shaft rotates to drive a main cone pulley to rotate, the main cone pulley rotates to drive a transmission cone pulley to rotate, and then through cooperation of a driven cone pulley, the energy-saving and environment-friendly spray granulation tower is driven to rotate. The second stirring shaft can conveniently rotate reversely, so that the materials in the mixing barrel can be fully stirred by a plurality of groups of stirring rods, and the problem that the quality and the size of formed spherical particles do not reach the standard due to the fact that the materials are not uniformly mixed can be avoided.

The invention relates to the technical field of ceramic substrates, and provides a bending-resistant aluminum oxide multilayer ceramic substrate and a preparation method thereof. The bending-resistant aluminum oxide multilayer ceramic substrate comprises the following raw material components in parts by weight: 95-110 parts of aluminum oxide, 3-8 parts of a plasticizer, 6-12 parts of an auxiliary agent, 4-7 parts of a binder, 3-6 parts of a dispersant and 60-70 parts of a solvent, the preparation method of the additive comprises the following steps: A1, adding calcium oxide into ethanol, adding glucose, stirring until the materials are uniformly mixed, and concentrating to obtain a glucose coated material; a2, carrying out annealing treatment on the glucose coated material to obtain a carbon coated material; and A3, uniformly mixing the carbon-coated material with magnesium oxide and titanium dioxide, and carrying out ball milling to obtain the auxiliary agent. According to the technical scheme, the problem of low mechanical property of the aluminum oxide ceramic substrate in the prior art is solved.

The invention provides a method for preparing a beta ''-aluminum oxide ceramic membrane through tape casting, and belongs to the field of conductive ceramic materials. The method comprises the following steps: carrying out first ball milling on a high-purity aluminum-containing compound, a sodium-containing compound, a stabilizer, a dispersant and a solvent to obtain first slurry; adding a binder, a plasticizer and a foam inhibitor into the first slurry to obtain second slurry; performing second ball milling on the second slurry to obtain third slurry; defoaming the third slurry to obtain fourth slurry with set viscosity; carrying out tape casting on the fourth slurry to obtain an aluminum oxide green body; and degumming, pre-sintering and sintering the aluminum oxide green body to obtain the beta ''-aluminum oxide ceramic membrane. Therefore, the beta ''-aluminum oxide ceramic membrane with controllable thickness, stable quality and low resistivity is obtained, and the application performance of the beta''-aluminum oxide ceramic membrane is improved.

The invention relates to the technical field of reactor thermal hydraulics and safety, in particular to a long electric heating plate heat insulation structure and a heat transfer simulation experiment device with the long electric heating plate heat insulation structure. The long electric heating plate heat insulation structure comprises a heat insulation base, a heating plate and a cementing layer. The heat insulation base is configured to be a ceramic resin plate, and a sinking groove is formed in one plate face of the heat insulation base. The heated plate is arranged in the sinking groove so that the plate face of the heated plate can be flush with the plate face of the heat insulation base, and the surface, corresponding to the groove wall and the groove bottom of the sinking groove, of the heated plate is provided with a micropore aluminum oxide ceramic layer which is subjected to nanocrystallization treatment through an active coupling agent. And the cementing layer is arranged between the heated plate and the heat insulation base in a high-temperature vacuum pressure environment. According to the heat transfer simulation experiment device, it can be ensured that the heated plate has good single-side heat dissipation performance under the temperature working condition that the surface of the dispersion type fuel element is blistered, the experiment safety during operation of the heat transfer simulation experiment device can be ensured, and the accuracy of a measurement result in a simulation experiment can be ensured.

The invention relates to the technical field of non-oxide ceramic-based composite materials, in particular to Fe-N-based high-entropy nitride ceramic as well as a preparation method and application thereof. The method comprises the following steps: by taking iron powder as a sintering aid, mixing (Hf < 0.2 > Zr < 0.2 > Ti < 0.2 > Nb < 0.2 > Ta < 0.2 >) N high-entropy powder with the iron powder, and carrying out ball milling treatment to obtain ball-milled powder; and under the oxygen-free condition, the ball-milled powder is subjected to sintering treatment, transformation from the loose ball-milled powder to compact and uniform solid solution ceramic is achieved in the sintering treatment process, and the Fe-N-based high-entropy nitride ceramic is obtained. According to the method, a nitride thermal reduction method sintering process is adopted, energy is provided for densification of the Fe-N-based high-entropy nitride ceramic by utilizing reaction heat release of the (Hf0. 2Zr0. 2Ti0. 2Nb0. 2Ta0. 2) N high-entropy powder and the iron powder, the sintering temperature is reduced, energy is saved, and the defect that densification needs to be carried out under a high-temperature condition in the prior art is overcome.

The invention discloses a high-thermal-conductivity aluminum oxide ceramic material and a new energy battery cover plate. The material comprises the following raw materials in parts by weight: 80-85 parts of aluminum oxide; 10 to 15 parts of zirconium oxide; 2-5 parts of a heat-conducting toughening agent; 5-10 parts of a beryllium oxide coated one-dimensional carbon material; wherein the heat conduction toughening agent comprises silica gel particles and graphitized carbon. According to the high-thermal-conductivity aluminum oxide ceramic material, on one hand, a one-dimensional carbon material is coated with beryllium oxide to form a network structure, and super-strong mechanical properties are provided for the material; and on the other hand, the heat conduction toughening agent is added, and the heat conduction toughening agent comprises graphitized carbon, silica gel particles and high polymers, so that the toughness, the strength and the heat conduction performance of the material are remarkably improved, and the requirements of the new energy battery cover plate can be met.

The invention belongs to the field of semiconductor bridge current protection, and particularly relates to a semiconductor bridge current protection method based on a vanadium dioxide thick film thermistor. Firstly, copper, nickel and gold interdigital electrodes are deposited and grown on an aluminum oxide ceramic substrate, then a methanol solution of vanadyl acetylacetonate is sprayed on the surface of the heated interdigital electrode, a vanadium dioxide thermistor device is obtained, the vanadium dioxide thermistor device is connected with a semiconductor bridge in parallel, and current protection of the semiconductor bridge thermistor is achieved. Vanadium dioxide with a single valence state can be synthesized by adjusting the synthesis method and process, M-phase vanadium dioxide is synthesized on the interdigital electrode in one step, the vanadium dioxide prepared by the method avoids the tedious process that vanadium dioxide powder is firstly prepared and then transplanted to the surface of the interdigital electrode, and the preparation method is simple and convenient to operate. And the vanadium dioxide can be more stably combined on the surface of the interdigital electrode.

The invention belongs to the field of conductive aluminum oxide ceramic preparation, and particularly relates to a treatment method for performing carbon deposition infiltration on the surface of aluminum oxide ceramic to enable the aluminum oxide ceramic to have certain conductivity. According to the invention, wheat starch and corn starch are used as main raw materials and are converted into a volatile carbon source through a high-temperature carbonization process under the protection of inert gas; and placing the carbon source and aluminum oxide ceramic pre-subjected to conductive treatment in a high-temperature furnace protected by inert gas, and performing deposition carburizing treatment on the surface of the aluminum oxide ceramic at 800-900 DEG C to obtain the aluminum oxide conductive ceramic with certain conductivity. The method is low in raw material cost, low in sintering temperature of the related process, low in equipment investment, good in surface carburization uniformity of the aluminum oxide ceramic and stable in property.

The invention discloses 95 aluminum oxide ceramic for a vacuum switch and a preparation method of the 95 aluminum oxide ceramic, and belongs to the technical field of aluminum oxide ceramic and vacuum switches. The ceramic disclosed by the invention is prepared from the following raw materials: 3 to 5 parts of nano alpha-aluminum oxide, 0.05 to 0.1 part of yttrium oxide, 0.04 to 0.08 part of lanthanum oxide, 0.3 to 0.6 part of zirconium silicate, 3.0 to 4.5 parts of fused quartz, 1 to 1.6 parts of magnesium fluoride, 0.3 to 0.5 part of calcium carbonate, 0.3 to 0.5 part of barium carbonate, 1.5 to 2.5 parts of Suzhou clay and 93 to 94 parts of micron alpha-aluminum oxide. The prepared high-performance 95 aluminum oxide ceramic has excellent breaking strength, electric breakdown strength, thermal shock resistance, chemical stability and the like, can meet the performance requirements of a high-pressure vacuum tube in a severe working environment, and ensures the working stability of a circuit.

The invention discloses a bimetallic Ag and Pd loaded WO3 material and a preparation method thereof, and relates to the technical field of sensor material preparation, and the preparation method comprises the following steps: 1, dissolving a tungsten source in an ethanol solution, mixing, hydrolyzing, aging, precipitating, washing, drying, calcining and cooling; 2, adding deionized water, adding a silver source solution and a palladium source, adding ascorbic acid, and stirring; 3, centrifuging, washing with ethanol and deionized water, and drying; 4, selecting a gold interdigital electrode with aluminum oxide ceramic as a substrate as a base electrode material, dipping the WO3 nano-particle dispersion liquid by using a line drawing pen, and uniformly coating the WO3 nano-particle dispersion liquid on the surface of the interdigital electrode; and 5, electrode drying and heat treatment. The efficient gas sensing material is prepared through the preparation method which is easy to operate, environmentally friendly and economical, and the gas sensing material has the advantages of being high in sensitivity, rapid in response, good in selectivity and the like at the low working temperature.

A method of additive manufacturing. The method comprises: i) positioning porous particles on a substrate, the porous particles having an average porosity and comprising at least one material chosen from metals and metalloids; ii) heating at least a portion of the porous particles to a reaction temperature; and iii) exposing the porous particles to a reactant gas to form a layer comprising a non-oxide ceramic. A method of making porous particles is also disclosed.

To provide a producing method of a ceramics member provided with an oxide ceramics sintering portion suppressed in generation of cracks accompanying sintering and having precise composition.SOLUTION: A method for producing a ceramic member 20 includes a step of irradiating at least a part of a precursor molded body 12 containing particles of oxide ceramics for sintering and a sintering aid containing a metal fluoride with a laser to sinter the oxide ceramics for sintering of the laser irradiation portion. The wavelength of the laser is preferably 350 to 2500 nm, and the output is preferably 1 to 1000 W / cm2. When a precursor molded body containing alumina as the oxide ceramics for sintering and yttrium fluoride as the metal fluoride is used, a ceramic member is obtained that includes a main phase made of alumina crystals and a grain boundary phase formed between the alumina crystals, and the ceramics member provided with an alumina sintering portion with the grain boundary phase including Y3Al5O12 is obtained.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of magnetism isolating plates, and particularly relates to a novel magnetism isolating plate which comprises a composite plate, the composite plate is composed of an outermost wear-resistant and corrosion-resistant protective layer, a middle high-permeability magnetism isolating material layer and an inner buffer layer in good contact with protected equipment, and the outermost wear-resistant and corrosion-resistant protective layer can be made of PTFE (polytetrafluoroethylene). The surface of the magnet vane is covered with the coating in a spraying or dipping mode, a uniform protective layer is formed, and the thickness of the uniform protective layer is usually 20 microns 300; and the middle layer of high-permeability magnetic isolation material layer is permalloy composed of 45 N i-Fe alloy containing 45% of nickel and 80 N i-Fe alloy containing 80% of nickel. According to the invention, the outermost layer is wear-resistant and corrosion-resistant, such as a PTFE or aluminum oxide ceramic layer, so that the interior is protected; the middle high-permeability magnetic isolation material layer effectively isolates a magnetic field; the inner buffer layer provides buffer, the buffer holes disperse stress and absorb energy and buffer, and the interval grooves enhance the fitting degree, so that stable operation of equipment in various complex environments is ensured jointly, and the service life of the magnet vane and the service life of the equipment are prolonged.

The invention discloses a seawater conductivity sensor electrode material based on a copper-nickel-based nanostructure and a preparation method, the electrode material comprises: a substrate, a copper-nickel-based nanostructure layer being formed on the surface of the substrate; the substrate comprises an insulating compound and a coating coated on the surface of the insulating compound, the insulating compound comprises at least one of high-resistance silicon, silicon oxide, aluminum oxide ceramic and plastic, the coating comprises a metal coating and / or a semiconductor coating, and the copper-nickel-based nanostructure layer is in a dendritic crystal or cluster form. The copper-nickel alloy nanostructure is a core material of the electrode, so that the electrode material has high specific surface area and rich active sites, the measurement accuracy and measurement limit of the electrode material can be improved, the service life can be prolonged, the manufacturing cost can be reduced, and the application requirements of the ocean Internet of Things can be met.

The invention provides modified zirconium silicate whisker reinforced aluminum oxide ceramic as well as a preparation method and application thereof, and belongs to the technical field of new materials. The preparation method comprises the following steps: modifying the surface of alumina powder with a silane coupling agent with sulfydryl to generate zirconium silicate in situ, uniformly mixing the zirconium silicate with zirconium silicate whiskers which are treated by hydrogen peroxide and modified by phytic acid and tannic acid and a CeO2-Y2O3-MgO-SiO2 compound, and performing spark plasma sintering to obtain the modified zirconium silicate whisker reinforced alumina ceramic. The modified zirconium silicate whisker reinforced aluminum oxide ceramic prepared by the invention has better interface bonding force, excellent mechanical properties and good wear resistance, realizes ceramic densification, and has wide application prospects.

The invention discloses glass powder for conductive gold paste as well as a preparation method and application thereof. The basic component of the glass is a compound system of P2O5-SiO2-B2O3-Al2O3 and Bi2O3-SiO2-B2O3-Al2O3, and Na2O, CaO, CuO, Sb2O3, ZrO2, NaF and the like are respectively added into the basic glass component, so that the single glass system and the compound glass powder have lower glass transition temperature and excellent high-temperature fluidity, and have excellent wetting and sintering-assisting effects on the gold powder. The average particle size of the glass powder is 2-3 microns, and the thermal expansion coefficient of the glass is 6.0-8.5 ppm / DEG C. When the glass powder is used in the conductive gold paste, the conductive gold paste can have firm physical and chemical bonding with an aluminum oxide ceramic substrate and an aluminum nitride ceramic substrate, and after being sintered on the substrate, the conductive gold paste has relatively high electrical properties (4.5-15.3 m omega), excellent adhesive force (10-25N) and good chemical stability (weight loss is lower than 0.5%).

The invention relates to the technical field of ceramics, in particular to aluminum oxide ceramic slurry as well as a preparation method and application thereof. The aluminum oxide ceramic slurry is prepared from alpha-aluminum oxide coarse powder, alpha-aluminum oxide fine powder, modified aluminum oxide powder, acrylamide, N, N '-methylene bisacrylamide and deionized water, multiple active functional groups are introduced into the surface of the modified aluminum oxide powder, interface bonding of particles with a dispersion medium and a polymer monomer is enhanced, and the surface of the particles is improved. According to the present invention, with the preparation method, the particle agglomeration tendency is reduced, such that the slurry can maintain the low viscosity under the high solid content condition so as to meet the gel injection molding process requirements, and the sintering body obtained through the gel injection molding has characteristics of high bending strength and high hardness, and can be widely used in the fields of electronic devices, mechanical sealing members, biomedical apparatuses and instruments, and the like.

The colored heat-insulating aerogel and the preparation method and application thereof are provided for the first time, metal ions are adsorbed on the surface of graphene oxide through the adsorption effect of oxygen-containing functional groups on the surface of graphene oxide on the metal ions, a water-plastic foaming method is used, and foaming and subsequent plasticizing processes are reasonably controlled, so that the color heat-insulating aerogel is obtained. The surface tension of a solvent is utilized to enhance the interface bonding of a foamed graphene aerogel skeleton, a surface-to-surface lapped graphene continuous dome network is formed, a thermal shock rapid heating and cooling mode is used, a graphene oxide sacrificial template is removed, uniform and fine metal oxide nanoparticles are formed, aggregation of the metal oxide nanoparticles is inhibited, and the graphene aerogel is prepared. The size of metal oxide nanoparticles is reduced, the metal oxide ceramic with a similar graphene aerogel continuous dome network structure can be obtained, and the prepared colorful ceramic is placed in customized laminated glass, so that the laminated glass has the properties of heat insulation and specific wavelength light absorption.

The invention relates to the technical field of nuclear fusion surface plasma W materials, in particular to nano rare earth oxide ceramic-Ti microalloy composite reinforced W powder, a composite material and a preparation method of the nano rare earth oxide ceramic-Ti microalloy composite reinforced W powder. The composite powder is of a nearly spherical core-shell hierarchical structure, and the particle size is 30-50 nm; according to the composite powder, refractory metal W serves as a matrix, nano rare earth oxide ceramic particles are evenly dispersed in matrix W crystal grains, Ti mainly forms an enrichment area on the surface of the matrix or a matrix / rare earth oxide interface in a simple substance or oxide mode, the phase interface structure is effectively improved, W crystal boundary migration and dislocation motion are hindered, W crystal grains are remarkably refined, and the composite powder is prepared. Part and W form semi-coherence, fine grain and interface strengthening and toughening are achieved, and a brand new thought and a technical method are provided for synergistically improving the strength and toughness of the W composite material. The composite powder is subjected to organic reduction synthesis and low-temperature reinforced sintering to prepare the composite material, the tensile strength at the room temperature reaches 500-610 MPa, and the ductility is 5%-8%.