29results about How to "Promotes sintering densification" patented technology

The invention discloses an MIM injection molding process of a neodymium-iron-boron magnet, which comprises the steps of raw material ratio adjustment, melt-spinning molding of a strip-shaped sheet, crushing treatment, mixing with a mixed solution of a coupling agent and ethanol, mixing and banburying with a binder, orientation injection molding, extraction degreasing, thermal degreasing, sintering, magnetizing and the like. Through the processes of optimization of raw material components, orientation injection molding, extraction degreasing, thermal degreasing and the like, near-net forming of a complex shape is achieved, meanwhile, the MIM neodymium-iron-boron magnet can achieve the excellent magnetic performance that the residual magnetization is larger than or equal to 1.04 T and the maximum magnetic energy product is larger than or equal to 29.7 MGOe, and the magnet yield and the production efficiency are greatly improved.

The invention relates to small-particle-size spherical hexagonal boron nitride nano-powder and a preparation method thereof. The method comprises the following steps: uniformly mixing boric acid and a nitrogen source, adding borax, uniformly mixing, and treating the obtained mixture at 75-85 DEG C or 250 DEG C for 2-5 hours; the obtained precursor is subjected to ball milling and drying or freeze drying, and then the obtained ball-milled precursor is heated to 900 DEG C in a high-pressure nitrogen atmosphere at the heating rate of 3-5 DEG C / min and subjected to heat treatment for 0.5-3 h; and putting the obtained product into water at 80-90 DEG C, stirring for 5-8 hours, and then performing post-treatment to obtain the small-particle-size spherical hexagonal boron nitride nano-powder. The prepared spherical boron nitride powder has the advantages of small particle size, high specific surface area and high sintering activity or the prepared spherical boron nitride powder has the advantages of small particle size and high crystallinity, and the preparation method is low in energy consumption, green and efficient.

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 high-density boron nitride ceramic material as well as a preparation method and application thereof. The high-density boron nitride ceramic material comprises a main phase, a second phase and an additive, the main phase comprises h-BN, the second phase comprises Al2Y4O9, and the additive comprises chopped BN fibers. The strength of the BN composite ceramic material is enhanced by adding the chopped BN fibers into the high-density boron nitride ceramic material, meanwhile, the excellent wave-transparent performance of the BN ceramic is kept, meanwhile, the Al2Y4O9 can ensure that the boron nitride ceramic material with higher density is obtained through sintering under a relatively low-temperature condition, so that the energy consumption is reduced, the chopped BN fibers are combined with an h-BN main phase, and the energy consumption is reduced. Deformation of the h-BN main phase can be restrained, meanwhile, deformation of the h-BN main phase is restrained by the h-BN, and therefore the mutual enhancement effect is achieved; in addition, the mechanical property is further improved due to deflection of fibers or BN crystal grains when the fibers are broken and cracked, and the bending strength of the high-density boron nitride ceramic material is improved due to the comprehensive action.

The invention belongs to the technical field of ceramic preparation, and particularly relates to a tin oxide ceramic material and a preparation method and application thereof. According to the invention, oxygen vacancies are introduced into the conductive doped oxide, so that the conductivity of tin oxide is greatly improved; the sintering aid promotes liquid-phase sintering of the biscuit in the sintering process, so that the problem of sintering difficulty caused by volatilization of tin oxide at a high temperature of 1200 DEG C is solved, particle rearrangement and mass transfer processes are greatly promoted, and sintering densification of tin oxide is promoted; due to the introduction of gallium oxide, not only is pinning at the tin oxide grain boundary to prevent grain growth and obtain uniform and fine grain size, but also the conductivity of the ceramic material is further improved. The tin oxide ceramic material obtained by the invention has the characteristics of high density, low resistivity and uniform and fine crystal grains. Meanwhile, the preparation process is simple and suitable for industrial production.

The invention belongs to the technical field of titanium alloy powder preparation, and particularly relates to a preparation method of a high-density Ti-Nb alloy. The preparation method comprises the following steps: firstly, mixing Ti powder and Nb powder, pressing, and then carrying out first vacuum sintering to obtain a Ti-Nb primarily homogenized alloy; then slicing and then carrying out hydrotreating, and carrying out ball milling to obtain hydrogenated Ti-Nb alloy powder; and finally, the hydrogenated Ti-Nb alloy powder is pressed and then subjected to second-time vacuum dehydrogenation sintering, a large number of defects are generated through dehydrogenation, element diffusion and sintering densification are facilitated, the homogenized and high-quality dense Ti-Nb alloy is finally prepared, and the bottleneck that the alloy prepared through a traditional powder metallurgy technology is large in melting point difference and low in density is solved.

The invention relates to molybdenum alloy composite powder with a micro-nano multi-scale configuration and a preparation method of molybdenum alloy, MoO2 powder, Ti3Al and TiC are mixed, ground and spray-dried to obtain precursor composite powder, the precursor composite powder is subjected to high-temperature reduction to obtain the molybdenum alloy composite powder with the micro-nano multi-scale configuration, then cold isostatic pressing blank pressing is performed, and the molybdenum alloy composite powder with the micro-nano multi-scale configuration is obtained. And then vacuum hot pressed sintering is conducted at the high temperature, and the molybdenum alloy sintered blank of the micro-nano multi-scale configuration is obtained. The layered secondary phase is introduced, the secondary phase provides a confined growth space for molybdenum particles in the powder reduction process, the particle size of the powder is effectively reduced, the molybdenum alloy composite powder of the micro-nano multi-scale configuration is obtained, the nano molybdenum particles are preferentially molten in the high-temperature sintering process, sintering densification is promoted, and the sintering temperature is lowered. The interface bonding relation between a secondary phase and a matrix is improved, the structure of the obtained molybdenum alloy sintered blank is more uniform, the recrystallization temperature of the molybdenum alloy is increased, and the strength of the molybdenum alloy at the ultrahigh temperature is remarkably improved.

The invention discloses a rare earth lubricated high-speed train brake pad and a preparation method thereof. The train brake pad comprises iron and copper mixed powder, flake graphite and granular graphite mixed powder, molybdenum disulfide, alumina fibers, high-carbon ferrochrome powder, chromium powder and rare earth element powder. The prepared high-speed train brake pad is prepared through the processes of powder mixing, cold pressing forming and hot pressing sintering. The high-speed train brake pad has the outstanding advantages that the cost of raw material powder is low; the problem of dispersity caused by nano powder is avoided, the sintering densification process is also promoted by adding rare earth elements, the whole preparation process of the brake pad material is relatively simple, and large-scale production is easy; through the collaborative design of chromium and rare earth elements, the brake lining material has the capacity of self-adaptive adjustment along with the change of braking conditions. The iron-copper-based brake pad prepared through the method can be well matched with a carbon-ceramic brake disc at the speed of 400 km / h or above, and stable and high friction coefficient and wear resistance are achieved.

The present invention provides a rare earth metal modified layered positive electrode material for sodium ion batteries and a preparation method thereof. The main structure of the rare earth metal modified layered positive electrode material for sodium ion batteries is an O3 phase, and the chemical formula is NaNi a Fe b Mn c Re d O 2 , 0.28≤a≤0.33, 0.28≤b≤0.33, 0.28≤c≤0.33, 0≤d≤0.05, Re represents a rare earth metal element; the layered positive electrode material includes spherical secondary particles, the secondary particles include a plurality of stacked flaky primary particles, part of the rare earth metal elements are distributed on the surface of the secondary particles in the form of rare earth metal oxides, and part of the rare earth metal elements are doped in the layered positive electrode material lattice in the form of rare earth metal ions. The positive electrode material provided by the present invention is modified based on rare earth metal elements, and has good sphericity and rich pore structure. The battery containing the positive electrode material exhibits excellent rate performance and good cycle stability.

The invention discloses a grain size grading design method of a low-shrinkage ceramic green body and application of the grain size grading design method in quartz ceramic preparation, and belongs to the technical field of ceramic materials. By optimizing the particle size grading of quartz, cristobalite crystallization in the preparation process of the quartz ceramic is promoted, the sintering densification is improved, and the mechanical property and the size stability of the quartz ceramic, especially the bending strength under the high-temperature condition, are remarkably improved.

The invention relates to the field of ceramic materials, in particular to a high thermal conductivity silicon nitride ceramic material and a preparation method thereof. The silicon nitride ceramic material contains in-situ generated aluminum nitride nanowires and is prepared from the following raw materials in parts by weight: 80-100 parts of silicon nitride, 5-10 parts of silicon nitride magnesium, 5-10 parts of yttrium oxide, 1-5 parts of fluoride, 1-3 parts of aluminum isopropoxide, and 10-20 parts of a binder. Tests show that the silicon nitride ceramic material prepared by the invention has high mechanical strength and excellent thermal conductivity. As a ceramic substrate material, the silicon nitride ceramic material can meet the application requirements of high calorific value and large thermal strain of future semiconductor devices.

The application discloses a kind of core-shell structure nanometer powder toughened zirconia ceramics and preparation method thereof, belong to ceramic material technical field, the method includes using three-dimensional network gel to realize washing-free co-precipitation method to prepare high-activity, ZrO2@SiO2Core-shell structure nanometer zirconia raw material powder, and stable agent is mixed ball milling, drying, sieving, shaping, cold isostatic pressing and gets green body, green body is placed in vacuum furnace and sintering, annealing and obtains toughened zirconia ceramic target product, realizes the efficient preparation of jade quality feeling simulation ceramic tooth of integral penetration.The application avoids the repeated washing steps of precursor in the traditional co-precipitation preparation process, reduces the introduction of impurities, the sintering temperature is lower, the powder yield is high, the process is simple, the cost is low, and is suitable for the industrial production of toughened zirconia ceramics.

The present invention relates to the technical field of porous ceramic materials, and in particular to a porous ultra-high channel ceramic material with high chemical stability and a preparation method thereof. The material is prepared by using a mud material, which includes spherical β-silicon carbide powder, a sintering aid, white sucrose, a binder, a lubricant and water; the D 50 0.2‑2.0 μm, D 100 Less than or equal to 10μm, the mass percentage of β phase in spherical β silicon carbide powder is greater than or equal to 99.0%. This method uses highly active spherical β silicon carbide powder as the main raw material, has high reaction activity, and can easily achieve densification by low-temperature sintering, which can improve the ceramic packing density and mud fluidity and reduce extrusion pressure; this method breaks through the technical barriers of high pore density and ultra-thin wall silicon carbide porous ceramics, with a simple production process and low cost; the material has the advantages of high pore density and thin wall, so that its geometric specific surface area is large to meet various needs.

This invention relates to the field of printing coating preparation technology, and discloses a printable gold coating composition based on resin gold salt. The preparation method includes the following steps: turpentine oil and sulfur powder are stirred and mixed, refluxed at 110-130℃ for 2-4 hours, and after the reaction, the mixture is cooled and filtered to obtain sulfurized balsam, which is stored in the dark for later use; the sulfurized balsam is reacted with chloroauric acid solution to prepare sulfurized balsam gold; a composite resin acid salt additive and a portion of the solvent are ultrasonically premixed, and then the sulfurized balsam gold, a high-molecular organic carrier, and the remaining solvent are added sequentially, stirred, and degassed and aged using a planetary gravity mixer to obtain a printable gold coating composition based on resin gold salt. The obtained gold coating composition possesses good printability, conductivity, surface smoothness, and decorative properties, and is suitable for various coating methods such as screen printing and pad printing, forming a thin and continuous conductive gold film, meeting the industrial preparation requirements of ceramic-based sensor electrodes.

The invention relates to a low-temperature rapid preparation method of MgAlON transparent ceramic with high infrared transmittance, and belongs to the field of ceramic preparation. The method comprises the following steps: designing the chemical composition of MgAlON according to an Al2O3-AlN-MgO phase diagram, synthesizing pure-phase MgAlON powder by using 76-77 wt.% of gamma-Al2O3, 13-14 wt.% of AlN and 9-9.6 wt.% of MgAl2O4 as raw materials through a high-temperature solid-phase method, adding a sintering aid, carrying out ball milling, drying to obtain MgAlON / sintering aid mixed powder, carrying out dry-pressing molding to prepare a blank, heating the blank to 1780-1900 DEG C at a speed of 10-40 DEG C / min in a nitrogen atmosphere, carrying out heat preservation for 30-180 minutes, carrying out heat preservation for 20-30 minutes at a speed of 10-40 DEG C / min, carrying out heat preservation for 20-30 minutes at a speed of 20-30 DEG C / min, and the MgAlON transparent ceramic is prepared. The method has the characteristics of controllable chemical composition, simple sintering equipment, low sintering temperature, short heat preservation time, high infrared transmittance of the prepared MgAlON ceramic and the like, and is good in energy-saving effect, high in efficiency, low in cost, suitable for preparation of large-size and complex-shape sample pieces and easy to realize industrialization.

This invention discloses a high thermal conductivity semiconductor packaging substrate and its preparation method, relating to the field of electronic materials technology. The method includes the following steps: mixing composite aluminum nitride powder with a sintering aid, ball milling, drying, and pressing into shape; sintering under high temperature and high pressure in a nitrogen atmosphere to obtain an aluminum nitride ceramic substrate; washing and drying the aluminum nitride ceramic substrate; covering both sides of the aluminum nitride ceramic substrate with copper foil, laying active solder between the aluminum nitride ceramic substrate and the copper foil, and then connecting them by vacuum brazing to obtain the semiconductor packaging substrate; the composite aluminum nitride powder is composed of aluminum nitride powder and modified aluminum nitride powder in a mass ratio of (6~8):(2~4). The semiconductor packaging substrate prepared by this method has excellent interfacial compatibility, effectively reduces interfacial thermal stress, and has good thermal conductivity.

The application belongs to the field of ceramic powder preparation, and discloses a method for in-situ preparation of high-performance TiB2-B4C composite ceramic from sapphire fine grinding waste. The method uses the waste produced in the sapphire grinding process as raw material (B4C, Al2O3 and Fe), adds TiO2 and C after alkali washing and purification, and combines with the discharge plasma sintering to in-situ prepare TiB2-B4C composite ceramic. The method not only realizes the comprehensive recovery of B4C in the sapphire fine grinding waste slurry, reduces environmental pollution, but also provides a method for in-situ preparation of TiB2-B4C composite ceramic from waste, changes waste into treasure, and realizes the secondary use of resources. In addition, the raw material cost is low, and the method has obvious economic value and environmental protection significance. The method has the advantages of short process, small pollution, simplicity and the like, and can be used for industrial production.

The invention provides a lithium fluoride ceramic target as well as a preparation method and application thereof. The preparation method comprises the steps of mixing, dry pressing, cold isostatic pressing, pressureless sintering and post-treatment which are carried out in sequence, wherein the applied pressure of the cold isostatic pressing forming is 50 to 300 MPa; the target temperature of pressureless sintering is 550-750 DEG C, and the heat preservation time is longer than or equal to 1 h. The high-density lithium fluoride ceramic target material is successfully prepared in a cold isostatic pressing and pressureless sintering combined mode, and the current technical blank is filled.

The invention relates to the field of refractory materials, and discloses a high-purity alumina lightweight aggregate and a preparation method thereof. The aggregate is prepared from alumina micro powder with a specific particle size ratio: 50-60 wt% of micro powder with the particle size of 70-115 [mu] m, 20-30 wt% of micro powder with the particle size of 20-36 [mu] m and 10-20 wt% of micro powder with the particle size of 2.5-5 [mu] m, and each micro powder needs to meet the conditions that the content of alpha-Al2O3 is greater than or equal to 99.6% and the content of Na2O is less than or During preparation, water, the foaming agent, the foam stabilizer, the binding agent, the dispersing agent and the sintering aid are added in an external addition form, and the preparation method comprises the steps of mixing, pulping, foaming, foam stabilizing, pouring, drying, high-temperature sintering and the like. A foaming method is adopted to replace a traditional high-energy-consumption electric melting process, the sintering temperature is reduced to 1600-1700 DEG C, and the energy consumption is reduced by 30% or above. The obtained aggregate has high purity (Al2O3 is greater than 99.4 wt%), low volume density (1.5-2.0 g / cm < 3 >), high apparent porosity (50-70%), excellent normal-temperature compressive strength (20-30 MPa) and low thermal conductivity (0.3-0.7 W / (m.K) at 1000 DEG C), perfectly solves the problem that light weight, high strength and efficient thermal insulation performance are difficult to consider at the same time, and is suitable for producing working lining and thermal insulation layer products of high-temperature industrial kilns.

The invention discloses a MIM injection molding process for a NdFeB magnet, comprising the steps of adjusting raw material ratio, melting and strip-spinning to form strip-shaped sheets, crushing, mixing with a mixed solution of a coupling agent and ethanol, mixing and kneading with a binder, oriented injection molding, extraction degreasing, thermal degreasing, sintering, magnetizing and the like. By optimizing raw material components, oriented injection molding, extraction degreasing, thermal degreasing and the like, near-net-shape forming of a complex shape is achieved, and the MIM NdFeB magnet can achieve excellent magnetic properties with residual magnetization intensity ≥1.04 T and maximum magnetic energy product ≥29.7 MGOe, and greatly improves the magnet yield and production efficiency.

The invention discloses a forming method for improving the density of a fiber-reinforced ceramic-based composite material, and belongs to the technical field of composite material preparation. According to the method, the specific precursor mixture is selected as an impregnation matrix material and then combined with a high-temperature pressure sintering process, process parameters of different composite stages are regulated and controlled, the problem that a matrix formed by cracking of polyborosilazane in an existing process is non-uniform in distribution is solved to the maximum extent, internal defects of the material are reduced, and the performance of the material is improved. The non-uniform degree and the density of the composite material are greatly improved, and the damage degree to the fibers is reduced by reducing the number of compounding times, so that the fibers can exert better reinforcing and toughening effects, the tensile property, the bending property and other mechanical properties of the composite material are effectively improved, and finally the high-performance silicon-boron-nitrogen fiber reinforced silicon-boron-nitrogen composite material can be obtained.

The invention discloses a carbon ceramic closing resistor for a high-voltage circuit breaker and a preparation method of the carbon ceramic closing resistor, and belongs to the technical field of power elements. The problems of poor resistor compactness, non-uniform performance, insufficient mechanical property and the like caused by high pressing and sintering difficulty, process instability and high and non-uniform resistor porosity of the carbon ceramic resistor are solved. The preparation process of the resistor comprises the following steps: by taking aluminum oxide and quartz as ceramic phases, presintered kaolin, mullite and potassium feldspar as clay phases and carbon black or graphite as conductive phases, pre-coating the ceramic phases with the clay phases, carrying out vacuum calcination on pre-coated powder, mixing the pre-coated powder with the secondarily added clay phases and the conductive phases, carrying out spray granulation, pressing a green body, sintering and spraying. And obtaining the carbon ceramic closing resistor. According to the invention, the kaolin is pre-sintered, and the clay phase is pre-coated with the ceramic phase, so that the subsequent blank pressing uniformity and density are increased, the structural defects of the carbon ceramic resistor are reduced, and in combination with the spark plasma sintering technology, the batch rapid production of the resistor can be realized.

The present invention discloses a high-strength lightweight thermal insulation castable and a preparation method thereof, wherein the castable comprises the following raw materials in weight percentage: 20-45 parts of modified expanded perlite, 10-35 parts of ceramsite, 3-8 parts of silicon powder, 8-15 parts of pure calcium aluminate cement, 10-20 parts of fly ash, 5-15 parts of coke gemstone fine powder, 0.1-0.2 parts of water reducer, 0.1-0.15 parts of binder silica sol, 2-4 parts of short-cut zirconium-containing refractory fiber, 0.5-1 parts of heat-resistant stainless steel fiber, 0.8-1.5 parts of explosion-proof fiber, 4-8 parts of calcium carbonate powder, and 8-12 parts of kyanite fine powder. The present invention uses modified expanded perlite as the main component of lightweight aggregate, and composites it with an appropriate amount of ceramsite to obtain a composite lightweight aggregate to prepare the castable, so that the castable has light bulk density, high flexural strength, high compressive strength, and excellent thermal insulation performance and thermal shock resistance stability.

The application belongs to the technical field of silicon carbide ceramic preparation, and particularly relates to a silicon carbide ceramic slurry based on DIW-3D printing, a silicon carbide ceramic product and a preparation method. The silicon carbide ceramic slurry is prepared from raw materials including the following components and weight contents: silicon carbide mixed powder 60-100 parts, thermosetting resin 10-40 parts, dispersing agent 5-15 parts and thermal initiator 0.01-1 part. The application realizes the application of DIW-3D printing in the preparation of silicon carbide ceramic through the synergistic effect of double-particle-size SiC grading, introduction of B4C sintering aid, special resin and dispersant system, thermal initiation and solidification, DIW rheological design and gas pressure sintering, saves the material cost in the manufacturing process, prepares a silicon carbide sample with excellent mechanical properties, and further widens the development of silicon carbide ceramic.

The present invention provides a high-density tungsten alloy powder for additive manufacturing, which belongs to the technical field of metal-based composite materials and additive manufacturing, and contains W elements and transition metal elements, wherein the mass fraction of the W element is ≥30%, and the mass fraction of the transition metal element is ≤70%; the high-density tungsten alloy powder is a solid spherical alloyed powder, and there is no pore inside the powder, and its microstructure is composed of tungsten grains and a transition metal element bonding phase with tungsten solid solution; the high-density tungsten alloy powder has a bulk density of 50% or more of the theoretical density, a tap density of 60% or more of the theoretical density, a Hall flow rate of ≤14s / 50g, and a particle size distribution of 15 to 53μm. The high-density tungsten alloy powder has higher self-strength, bulk density and tap density, and lower Hall flow rate, which is conducive to improving the performance of additive manufacturing products. The present invention also provides a preparation method and application of a high-density tungsten alloy powder for additive manufacturing.

The application discloses a preparation method of a high-temperature alloy, which comprises the following steps: (1) mixing high-temperature alloy raw material powder with a granulating agent to perform granulation to obtain granulated raw material; and (2) under vacuum conditions, the granulated raw material is sintered by using oscillation hot pressing, and during sintering, an alternating load is adopted to control the grain growth process, so that the high-temperature alloy is obtained. The preparation method of the high-temperature alloy first performs granulation on alloy powder, and then controls the grain growth process of the product by controlling the alternating load of the oscillation hot sintering process, so that the grain refinement is facilitated, the fine-grain strengthening effect is generated, and the mechanical properties of the high-temperature alloy product are greatly improved. In addition, through the mutual synergistic effect of the granulation and the alternating load, the compactness of the product can be improved.

The invention discloses a preparation method of a high-temperature-resistant hafnium boride ceramic material, and belongs to the technical field of ceramic materials, the preparation method comprises the following steps: preparing composite hafnium boride powder, preparing composite silicon carbide powder, mixing and sintering; the preparation of the composite hafnium boride powder comprises the following steps: preparing first-stage coated powder, preparing second-stage coated powder, preparing third-stage coated powder, and firing. The preparation of the composite silicon carbide powder comprises the following steps: primary treatment and secondary treatment; in the step of material mixing, composite hafnium boride powder, composite silicon carbide powder and absolute ethyl alcohol are mixed according to the mass ratio of (70-72): (28-30): (160-200), ball milling is conducted for 4-5 h, then drying is conducted, and mixed powder is obtained. The prepared high-temperature-resistant hafnium boride ceramic material is high in density and good in thermal stability, thermal shock resistance, mechanical property and heat-conducting property.

This invention discloses a method for preparing yttrium-magnesium oxide (YMO) multiphase transparent ceramics using non-aqueous gel casting, belonging to the field of ceramic preparation technology. To overcome the problems associated with water-based gel casting, this invention provides a method for preparing YMO multiphase transparent ceramics using non-aqueous gel casting, comprising: ball milling Y2O3, MgO, a dispersant, and a non-aqueous solvent; then adding epoxy resin and a curing agent and ball milling again; the resulting ceramic slurry is defoamed, cured, and dried; then subjected to debinding, sintering densification, cooling, hot isostatic pressing, annealing, and polishing to obtain the YMO multiphase transparent ceramic. This invention overcomes the difficulties in preparing large-size Y2O3-MgO nano-multiphase infrared transparent ceramics and the problem of component inhomogeneity by designing a non-aqueous solvent system and selecting a suitable gel system, and can produce complex-shaped / large-size, uniformly composed YMO nano-multiphase ceramics.

The invention relates to a forsterite-based high-temperature heat storage material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: impregnating carbonized rice husk powder in silica sol, performing pressure impregnation, and drying to obtain modified carbonized rice husk powder; uniformly mixing the modified carbonized rice husk powder, boron carbide micro powder and vanadium pentoxide micro powder, and performing heat treatment to obtain a mixture A; uniformly mixing forsterite powder, the mixture A, silica powder, magnesium oxide micro powder, a polyvinyl alcohol solution and nano manganese ferrite powder to obtain a mixture B; and carrying out compression molding on the mixture B, carrying out heat treatment at 800-900 DEG C for 1-2 hours under the argon or nitrogen atmosphere condition, and then carrying out heat treatment at 1100-1300 DEG C for 2-4 hours to obtain the forsterite-based high-temperature heat storage material. The forsterite-based high-temperature heat storage material prepared by the method is high in heat conductivity, high in photo-thermal conversion efficiency, high in compression strength and good in cycling stability.