3447 results about "Zirconium oxide" 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 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 carbon fiber reinforced ceramic matrix composites, in particular to a sintering process of a surface-modified short carbon fiber reinforced ceramic matrix composite, which comprises the following steps: surface modification treatment of short carbon fibers, preparation of a ceramic matrix material, mixing of the short carbon fibers and ceramic powder, compression molding and sintering. In the invention, the process is not only suitable for various ceramic matrixes such as aluminum oxide, silicon carbide, silicon nitride, zirconium oxide and the like, but also can flexibly adjust process parameters such as oxidizing agent types, coupling agent treatment time, ceramic powder particle size, forming pressure, sintering temperature and the like, so that customized preparation with different application requirements is realized; the prepared composite material has extremely high toughness, wear resistance and high-temperature resistance, and shows a wide application prospect.

The present invention belongs to the technical field of glass preparation, and specifically relates to an ultra-white glass and a preparation method thereof. The ultra-white glass of the present invention is composed of the following raw materials by weight: 110 parts of quartz sand, 18-20 parts of sodium carbonate, 14-16 parts of colemanite, 4.5-5.5 parts of magnesia, 2.6-2.8 parts of calcined alumina, 1.1-1.3 parts of potassium oxide, 0.8-1.0 parts of zinc oxide, 1.5-1.7 parts of phosphorus pentoxide, 0.15-0.20 parts of strontium chloride, 0.3-0.34 parts of calcium fluoride, 0.25-0.27 parts of barium nitrate, and 0.16-0.18 parts of zirconium oxide. The ultra-white glass of the present invention has a synergistic effect between the raw materials to ensure that the prepared ultra-white glass has excellent whiteness and visible light transmittance.

The invention relates to the technical field of ceramic substrates, and provides an aluminum oxide multilayer ceramic substrate and a preparation method thereof. The aluminum oxide multilayer ceramic substrate comprises the following raw materials in parts by weight: 80-90 parts of pretreated aluminum oxide, 1-4 parts of a sintering aid, 1-2 parts of a dispersing agent, 6-12 parts of a binder and 85-95 parts of a solvent, the preparation method of the pretreated aluminum oxide comprises the following steps: performing wet ball milling, drying, sintering and crushing on aluminum oxide, manganese sesquioxide, magnesium oxide and zirconium oxide to obtain the pretreated aluminum oxide. According to the technical scheme, the problem that the bending strength of the aluminum oxide multilayer ceramic substrate prepared from the aluminum oxide raw material with the purity of 95% in the related technology is low is solved.

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 provides an alkaline electrolytic water hydrogen production diaphragm based on zirconium oxide modification, the alkaline electrolytic water hydrogen production diaphragm comprises a support layer and a hydrophilic modified coating on the support layer, the hydrophilic modified coating is obtained by coating the support layer with a casting liquid prepared from modified zirconium oxide particles, a film-forming polymer and an organic solvent and then carrying out non-solvent induced phase inversion, the modified zirconium oxide particles are prepared by adding micron-sized zirconium oxide and alkali liquor into a ball mill for ball milling, and the particle size of the zirconium oxide subjected to ball milling treatment is 20-100nm. According to the method, the structure of the micron-sized zirconium oxide particles is regulated and controlled by combining a ball milling-alkali etching synchronous process. Through combination of ball milling treatment and alkali etching treatment, the dispersion degree and the reaction opportunity of the zirconium oxide powder can be effectively improved, and the efficiency of the etching process is remarkably improved. The obtained modified zirconium oxide particles endow the diaphragm with excellent hydrophilicity, alkali resistance and OH <-> ion conduction performance, and the diaphragm has excellent performance when being used as an alkaline electrolytic water hydrogen production diaphragm.

The invention discloses a preparation process of an aluminum oxide ceramic material, which comprises the following steps: S1, pretreatment of aluminum oxide powder: taking alpha-Al2O3 powder as a raw material, adding a dispersion medium, carrying out ball milling, transferring into an ultrasonic dispersion machine, dispersing, and further carrying out vacuum drying to obtain pretreated aluminum oxide powder; s2, chemical activation treatment: weighing pretreated aluminum oxide, magnesium oxide, nano silicon dioxide, calcium oxide, zirconium dioxide, titanium dioxide and modified nano silicon carbide in parts by weight, mixing, sequentially adding a dispersing agent absolute ethyl alcohol and a KH550 silane coupling agent, stirring at a high speed, adding a polyvinyl alcohol binder, and continuously stirring to obtain ceramic slurry; s3, sieving the ceramic slurry, filling the ceramic slurry into a mold, and performing isostatic pressing to obtain a ceramic green body; and S4, putting the ceramic green body into a box-type sintering furnace, sintering step by step, and cooling to room temperature along with the furnace to obtain the aluminum oxide ceramic material. The prepared aluminum oxide ceramic material has high compactness, excellent dielectric strength and mechanical property, low energy consumption and great application potential.

The application discloses a transparent strengthened glass ceramic with high stress depth, which contains spinel crystals and zirconia crystals in a crystal phase of the strengthened glass ceramic, and does not contain Li-containing crystals; the strengthened glass ceramic has a compressive stress region extending from a surface thereof to a compression depth, a compressive stress layer depth DOL_0 of the strengthened glass ceramic is greater than or equal to 14% of a thickness of the strengthened glass ceramic, and a tensile stress line density of the strengthened glass ceramic is greater than or equal to 25000 MPa / mm. By introducing more Li ions and Na ions into a spinel glass ceramic component, the prepared transparent spinel glass ceramic can be chemically strengthened, a transparent strengthened glass ceramic with high CS, DOL_0, CT_AV and CT_LD is obtained, and the strengthened glass ceramic exhibits excellent drop resistance.

The invention belongs to the technical field of ceramics, and discloses a preparation method of fracture-resistant and wear-resistant ceramics. The preparation method comprises the following steps: weighing the raw materials in parts by weight; the preparation method comprises the following steps: mixing 40 parts of potassium feldspar, 10 to 25 parts of albite, 1 to 10 parts of kaolin, 1 to 10 parts of serpentine, 5 to 25 parts of dolomite, 2 to 9 parts of nano zirconium oxide, 0.1 to 1 part of nano cerium oxide, 0.1 to 1 part of nano molybdenum disulfide, 0.1 to 0.8 part of silicon carbide fiber, 0.5 to 2.5 parts of polyethylene glycol, 0.1 to 0.6 part of fullerene trifluoromethyl derivative, 0.1 to 3 parts of sodium dodecyl sulfate, 0.1 to 2 parts of sodium tripolyphosphate and 10 to 60 parts of solvent to obtain slurry; and carrying out spray granulation to obtain a blank, carrying out compression molding to obtain a green body, and sintering to obtain the fracture-resistant and wear-resistant ceramic. The breaking strength of the breaking-resistant and wear-resistant ceramic can exceed 70 MPa, and the length of a grinding pit does not exceed 8.5 mm.

The invention provides an anti-corrosion ceramic sagger and a preparation method thereof.The anti-corrosion ceramic sagger comprises an aggregate layer and a matrix layer, and the aggregate layer is prepared from, by mass, 30-50 parts of yttrium-stabilized zirconia, 20-30 parts of silicon carbide and 15-25 parts of magnesium aluminate spinel; the matrix layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of mullite micro powder, 30 to 40 parts of cordierite micro powder and 10 to 20 parts of binding agent. According to the anti-corrosion ceramic sagger and the preparation method thereof, by optimizing the raw material ratio and the preparation process, the corrosion depth is smaller than or equal to 0.19 mm after the sagger is soaked in the molten salt environment at 900 DEG C for 72 h, the service life is prolonged by 6-8 times compared with that of a traditional corundum sagger, and the anti-corrosion ceramic sagger has wide application prospects.

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 a modified chrome corundum ramming material and a preparation and construction process thereof, and belongs to the technical field of chrome corundum ramming materials. The ramming material comprises a material A, a material B and a material C, wherein the material A comprises chrome corundum aggregate, titanium dioxide coated aluminum oxide microspheres, calcium sulfide dehydrate and silicon carbide porous microspheres; the material B comprises chromium oxide-zirconium oxide composite nano powder, sodium thiosulfate pentahydrate, tricalcium phosphate and hexagonal boron nitride flaky crystals; and the material C comprises an aluminum dihydrogen phosphate-magnesium hydroxide compound, a calcium fluoride-aluminum oxide co-melt and a silane coupling agent. The preparation process comprises the steps of pretreatment of all the components, preparation of composite powder and layered preparation. The construction process comprises the steps of pretreatment, wet-process mixing, layered ramming, negative-pressure permeation, medium-temperature reaction, spraying curing, integral firing and the like. Generation of hexavalent chromium can be effectively inhibited, the thermal shock resistance, the mechanical strength and the heat-conducting property of the material are remarkably improved, and the material has the advantages of being good in environment friendliness, long in service life, excellent in construction performance and the like.

The invention relates to the field of ceramic materials, in particular to a high-temperature-resistant composite ceramic material and a preparation method thereof.The high-temperature-resistant composite ceramic material is prepared from, by weight, 80-100 parts of zirconium oxide, 10-20 parts of silicon carbide, 5-10 parts of aluminum nitride, 1-5 parts of a sintering aid and 5-10 parts of modified silicon powder; the modified silicon powder takes nano silicon powder as a core body, the core body is sequentially coated with a transition metal organic polymer and oxidized asphalt, and the prepared composite ceramic material is good in mechanical strength and excellent in high temperature resistance and has important application value in the field of aerospace.

The invention provides a high-temperature-resistant magnesia-carbon composite refractory brick and a preparation method thereof, and belongs to the technical field of magnesium oxide refractory wall bricks, the refractory brick comprises the following raw materials: double-layer modified magnesium oxide, modified crystalline flake graphite, zircon powder, modified liquid phenolic resin and a benzoxazine cross-linking agent; the double-layer modified magnesium oxide is obtained by firstly coating magnesium oxide with powder phenolic resin, aluminum oxide and zirconium oxide and then coating magnesium oxide with asphalt, micron magnesium oxide, zirconium oxide and calcium oxide; the modified crystalline flake graphite is obtained by coating crystalline flake graphite with strontium hydroxide, asphalt and boron carbide; the modified liquid phenolic resin is formed by mixing liquid phenolic resin with a silane coupling agent and a polyacrylate cross-linked polymer. Double-layer modified magnesium oxide, modified crystalline flake graphite and modified liquid phenolic resin are prepared by adopting special components and a method and are matched with zircon powder and a benzoxazine cross-linking agent for use, and a reasonable forming and sintering process is designed, so that the refractory brick has good high-temperature stability, oxidation resistance, thermal shock resistance and the like.

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 provides ceramic binder slurry, a preparation method thereof and a gas sensor chip. The ceramic binder slurry comprises the following components in percentage by mass: 65-73% of yttrium-stabilized zirconia powder, 15-21% of an organic solvent, 4-6% of a binder, 1-3% of a plasticizer, 1-2% of a dispersant, 1-2% of a thixotropic agent and 1-2% of a lubricant. The ceramic binder slurry provided by the invention can effectively enhance the binding force between zirconium oxide substrates, thereby reducing the probability of layering and cracking of a ceramic layer of a sintered gas sensor chip due to inconsistent sintering temperature and shrinkage rate in the co-sintering process of the zirconium oxide substrates and an aluminum oxide insulating layer; and the yield of the gas sensor chip is improved.

The invention relates to the field of materials, in particular to a silicon dioxide aerogel composite thermal insulation material and a preparation method thereof. The silicon dioxide aerogel composite thermal insulation material is prepared by taking silicon dioxide aerogel, phenolic resin, a nano zirconium oxide graft and a locust bean gum graft as main raw materials and taking n-pentane, UV-327, hexamethylenetetramine and an antioxidant 1010 as auxiliary materials. The nano zirconium oxide graft and the locust bean gum graft are added into the silicon dioxide aerogel material, so that the prepared silicon dioxide aerogel composite material has excellent heat-insulating property, flame-retardant property and toughening effect, and the comprehensive requirements of the use scene of the silicon dioxide aerogel composite material on toughness and flame retardance are met; and the application market is expanded.

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 discloses an antibacterial corrosion-resistant coating and a preparation method thereof, and relates to the field of coating materials. The coating is prepared from the following components in percentage by mass: 2 to 5 percent of nano silver ion loaded mesoporous silicon dioxide nano particle antibacterial aid, 5 to 10 percent of zinc powder-containing corrosion inhibitor, 3 to 8 percent of nano montmorillonite, 30 to 40 percent of modified epoxy resin, 20 to 30 percent of polyurethane prepolymer and other aids. The nano silver ion antibacterial auxiliary agent is loaded in mesoporous silica nanoparticles through an ion exchange method, the zinc powder corrosion inhibitor is prepared through stirring and ball milling dispersion, and the modified epoxy resin is modified by adopting a silane coupling agent. The preparation process of the coating comprises the stages of premixing, grinding and refining, initiating polymerization and post-treatment, wherein a grinding medium is zirconium oxide beads with the diameter of 0.5-2 mm. The coating has excellent antibacterial and corrosion-resistant performance, is suitable for metal surface protection, and can effectively solve the problems that an existing coating is not lasting in antibacterial effect, insufficient in corrosion-resistant performance and not ideal in comprehensive performance.

The invention is applicable to the field of solid-state electrolyte and solid-state lithium ion batteries, and provides a preparation method of cubic-phase lithium lanthanum zirconium oxide solid-state electrolyte, which comprises the control of phase, grain size and element doping, and comprises the following steps: firstly, synthesizing a metal oxide precursor by using a coprecipitation method; carrying out surface modification on the metal oxide precursor through a rotary evaporation process, and simultaneously completing drying treatment; calcining the modified precursor powder under certain temperature and atmosphere conditions to obtain a corresponding metal oxide; and adding a lithium source and a doping agent into the metal oxide, and sintering at a certain temperature, atmosphere and pressure environment to obtain the LLZO solid electrolyte material with the cubic phase structure. According to the invention, the target of preparing the cubic phase LLZO solid electrolyte at a relatively low sintering temperature is achieved by regulating and controlling the particle size of the powder and introducing the doping element.

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 relates to the technical field of ceramics, and discloses an aluminum oxide ceramic glaze based on domestic waste ceramics, and a preparation method and application thereof. The aluminum oxide ceramic glaze comprises the following raw materials in parts by weight: 28-42 parts of domestic waste ceramic, 25-30 parts of kaolin, 6-12 parts of calcined talc, 3-7 parts of borax, 6-14 parts of aluminum oxide, 3-5 parts of zirconium oxide, 1-3 parts of lanthanum oxide and 3-6 parts of self-repairing particles. The self-repairing particles comprise mesoporous alumina doped with Si and Zr, and V2O5-B2O3-TeO2 series glass which is filled in pores of the mesoporous alumina and has a softening point of 200-300 DEG C. After the glaze is applied to the surface of the aluminum oxide ceramic to form a glaze layer, the insulativity of the aluminum oxide ceramic can be effectively improved, meanwhile, the high bonding stability between the glaze layer and the aluminum oxide ceramic can be achieved, and the problems that the insulativity is greatly reduced and the glaze layer cracks during heat circulation are solved.

The invention discloses high-toughness ultrathin flexible glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The ultrathin flexible glass is prepared from the following raw materials: silicon dioxide, aluminum oxide, lithium oxide, sodium oxide, magnesium oxide, a modified nano reinforced phase, a high-temperature melting regulator and cerium dioxide. The modified nano reinforced phase is prepared by the following steps: pre-treating silicon carbide and silicon nitride with hydrochloric acid, and mixing with nano zirconium oxide to obtain a mixture; and modifying the mixture with a silane coupling agent to obtain the modified nano reinforced phase. The high-temperature melting regulator is a mixture of lithium borate, sodium sulfate and lithium fluoride. The preparation method of the ultra-thin flexible glass comprises the following steps: preparing the modified nano reinforced phase, melting and homogenizing the glass, forming the glass substrate, and preparing the ultra-thin flexible glass. The ultra-thin flexible glass prepared by the invention has relatively high fracture toughness and structural rigidity, excellent flexibility and bending fatigue durability, and excellent thermal shock resistance.

The preparation process comprises the following steps: dissolving ammonium dimolybdate, ammonium rhenate and water at a high temperature, then adding zirconium hydroxide, uniformly mixing, carrying out vacuum drying, carrying out two-stage hydrogen reduction on the obtained precursor composite powder, and carrying out vacuum drying to obtain the zirconium dioxide reinforced phase-containing molybdenum-rhenium alloy capable of inhibiting abnormal growth of crystal grains, thereby obtaining the zirconium dioxide reinforced phase-containing molybdenum-rhenium alloy capable of inhibiting abnormal growth of crystal grains. Zirconium oxide reinforced molybdenum-rhenium composite powder obtained after reduction is subjected to cold isostatic pressing, pressureless sintering and hot isostatic pressing to obtain zirconium oxide reinforced molybdenum-rhenium alloy, and then the zirconium oxide reinforced molybdenum-rhenium alloy is obtained through high-temperature rolling and recrystallization annealing treatment. According to the method, atomic-level mixing of molybdenum and rhenium is achieved through liquid-phase doping, the microstructure of the molybdenum-rhenium alloy is more uniform and fine due to addition of ZrO2, the recrystallization temperature is increased, and the phenomenon that sintered grains of the molybdenum-rhenium alloy grow abnormally is relieved. And by optimizing the annealing process and regulating and controlling the annealing mode, grains are rearranged to form a more uniform microstructure, abnormal growth of the grains is further inhibited, and the high-temperature tensile strength and the ductility of the molybdenum-rhenium alloy are improved.

Systems and methods for fabrication of ceramics from celestial materials using microwave sintering and mechanical compression for space mining applications are disclosed. In one aspect, a chamber for sintering loose mineral material into solid ceramic shapes includes a plurality of zirconia insulting plates configured to clamp the mineral material and forming a cavity in which the mineral loose material is contained, and at least one dipole array configured to generate microwave energy and apply the microwave energy to the mineral material.

The invention belongs to the technical field of glass, and particularly relates to high-light-transmittance glass and a preparation method of the high-light-transmittance glass. The raw materials comprise the following components in parts by weight: 20 to 30 parts of quartz sand, 15 to 18 parts of sodium carbonate, 8 to 10 parts of limestone, 5 to 7 parts of dolomite, 0.3 to 0.5 part of a clarifying agent, 0.2 to 0.3 part of a coloring inhibitor, 0.1 to 0.2 part of lithium carbonate, 0.05 to 0.1 part of titanium dioxide, 0.1 to 0.3 part of zirconium oxide, 2 to 4 parts of aluminum oxide, 1 to 3 parts of boron oxide, 0.3 to 0.5 part of nano silicon dioxide sol and 1 to 3 parts of a high-temperature-resistant agent; and 1-5 parts of a wear-resistant agent. The quartz sand, the sodium carbonate, the limestone, the dolomite, the clarifying agent, the coloring inhibitor, the lithium carbonate, the titanium dioxide, the zirconium oxide, the aluminum oxide, the boric oxide, the nano silicon dioxide sol, the high-temperature-resistant agent and the wear-resistant agent are used as raw materials, so that the prepared glass is high in light transmittance, and meanwhile, the performance requirements of high strength, low spontaneous explosion rate and the like are met.

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.

A zirconia-based powder material, wherein [(Vp10-100) / (Vp100-6000)] satisfies the following Formula [1], provided that in a pore diameter distribution determined by a mercury intrusion method, a pore volume in a range of a pore diameter of X nm or more and less than Y nm is taken as VpX-Y:0.4≤[(Vp1⁢0-1⁢0⁢0) / (Vp100-6⁢0⁢0⁢0)]≤1.Formula [1]

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.