64results about How to "Lower sintering temperature" patented technology

The application provides a ceria / yttria composite stabilized zirconia grinding medium and a preparation method. The method comprises the following steps: step one, mixing zirconia, ceria, yttria and kaolin, and then adding an appropriate amount of dispersant and water to obtain a slurry; step two, performing centrifugal spray drying on the slurry to obtain ceria / yttria composite stabilized zirconia powder; step three, adding the ceria / yttria composite stabilized zirconia powder into a binder, and then rolling to form a green body of spherical grinding medium; and step four, sintering and polishing the green body of spherical grinding medium to obtain the ceria / yttria composite stabilized zirconia grinding medium. The method can obtain low particle size and high specific surface area through high-temperature ball milling, and can also promote the solid solution of the stabilizer into the zirconia crystal lattice through heat treatment, so as to improve sintering activity, reduce sintering temperature and reduce production cost.

This invention relates to a boron-doped multi-element polyanionic sodium-ion battery cathode material and its preparation method, comprising the following steps: [The method involves] mixing Na₄Fe₂O₃ with... 3‑X B X (PO4) 2‑Y (SiO4) Y The stoichiometric ratio of P2O7 is determined by adding ferrous source, boric acid, sodium source, phosphorus source, and silicon source to water, followed by the addition of carbon source and mixing thoroughly to obtain a mixed slurry; wherein 0.2≤X≤0.5, 0<Y≤1; the mixed slurry is then ground to obtain a sand-milled slurry; the sand-milled slurry is dried to obtain precursor powder; under a protective atmosphere, the precursor powder is sintered at 450~550℃ to obtain boron-doped multi-element polyanion sodium-ion battery cathode material. The introduction of boron and silicon elements in this invention helps reduce raw material costs, improve the electrochemical performance of the material, especially enhancing the structural stability, rate performance, and cycle life of the cathode material, and also lowers the sintering temperature, meeting the requirements for cost reduction and efficiency improvement.

This invention discloses a black-based blue-spotted glaze with an earthworm-like pattern and its preparation method. The glaze consists of a body, a black base glaze, and a blue-spotted glaze from the inside out. The raw materials for the black base glaze are: feldspar, calcite, calcium borate, dolomite, talc, barium carbonate, quartz, bentonite, zirconium silicate, rutile, cobalt oxide, manganese oxide, and iron oxide. The raw materials for the blue-spotted glaze are: feldspar, limestone, alumina, talc, barium sulfate, Datong clay, zinc oxide, quartz, and titanium dioxide. The preparation method includes: 1. Wet ball milling the black base glaze raw materials to obtain a black base glaze slurry; 2. Wet ball milling the blue-spotted glaze raw materials to obtain a blue-spotted glaze slurry; 3. Bisque firing the body; 4. Applying the black base glaze slurry to the body and drying it; 5. Applying the blue-spotted glaze slurry to the body and drying it; 6. Oxidation firing and reduction firing of the body, followed by natural cooling to obtain the black-based blue-spotted glaze. The raw material formula of this invention is reasonable and environmentally friendly, which can improve the mechanical properties of the glaze; the preparation method is simple and the yield is high.

The invention discloses a processing method for a copper-clad ceramic substrate, which relates to the technical field of copper-clad ceramic substrate processing, and comprises the following steps of: taking a pre-treated copper-clad ceramic substrate, introducing nitrogen, and carrying out layered progressive micropore processing on an exposed aluminum oxide ceramic substrate of the pre-treated copper-clad ceramic substrate through picosecond laser to form micropores; each micropore is divided into an inlet layer, a middle layer and an outlet layer from top to bottom; the layer number of the micropores, the thickness of each layer of the micropores and the pulse width are controlled, and a light spot and long-focal-depth lens is adopted; adjusting monopulse energy and frequency parameters of picosecond laser, and punching an inlet layer; adjusting monopulse energy and frequency parameters of picosecond laser, and punching the middle layer; and adjusting monopulse energy and frequency parameters of the picosecond laser, and punching the outlet layer to obtain the copper-clad ceramic substrate. In the middle layer, the monopulse energy is gradually increased, and it is ensured that the material is evenly removed; at the inlet layer and the outlet layer, energy is reduced, and cracks caused by stress generated instantly when the material is punctured are avoided.

The invention discloses a (Ti, W) C-AlCrCoNiMo high-entropy metal ceramic material as well as a preparation method and application thereof, and belongs to the technical field of metal ceramic materials. The invention provides a metal ceramic material which is prepared by taking (Ti, W) C ceramic as a matrix, adding Al, Cr, Co, Ni and Mo as a high-entropy alloy binding phase, carrying out two-step wet-dry composite ball milling process treatment and carrying out spark plasma coupling high-frequency induction sintering. The problem of segregation can be solved after two-step wet-dry composite ball milling process treatment, ideal pre-alloyed powder is obtained, the components are more uniform, the dispersity is better, and the composite powder treated by an optimized ball milling method is sintered through spark plasma coupling high-frequency induction. And the high-entropy metal ceramic material with high bending strength, high hardness and excellent fracture toughness can be obtained at the sintering temperature of 1300 DEG C.

The invention provides a preparation method of a high-compaction high-capacity lithium iron phosphate material, which comprises the following steps: (1) mixing polyvinyl alcohol, iron phosphate, a lithium source, a carbon source and water to obtain slurry A; mixing iron phosphate, a lithium source, a carbon source and water to obtain slurry B; (2) performing spray drying on the slurry A, and performing low-temperature sintering to obtain a black material C; performing spray drying on the slurry B, and performing high-temperature sintering to obtain a black material D; and (3) mixing the black material C and the black material D, crushing, adding barium titanate, carrying out ball milling, and drying to obtain the lithium iron phosphate material. The polyvinyl alcohol is partially acetylated modified polyvinyl alcohol. The sintering temperature is reduced by adding the modified polyvinyl alcohol to prepare the compact lithium iron phosphate material with smaller particle size, and the lithium iron phosphate material and the lithium iron phosphate material obtained by high-temperature sintering form grading of large and small particles, so that the compaction density of the lithium iron phosphate is improved.

The application provides a superfine diamond ceramic bond tool bit and a preparation method and application thereof, relates to the technical field of grinding tools, and comprises a base material and a functional additive; the base material comprises the following raw materials in parts by mass: 10-30 parts of a ceramic bond, 50-70 parts of diamond abrasive, 1-20 parts of a filler and 1-20 parts of a nano polishing agent; wherein the diamond abrasive is an irregularly shaped diamond aggregate; the functional additive comprises a temporary binder and a dispersing agent, the temporary binder accounts for 1-10% of the total mass of the base material, and the dispersing agent accounts for 1-10% of the total mass of the base material. The superfine diamond is not caused to agglomerate in the mixing process by changing the mixing mode of the diamond and introducing the diamond in the form of an irregularly shaped diamond aggregate, and the surface roughness of a workpiece is greatly improved by adding a spherical nano polishing agent, and the process is simple, controllable and stable.

The invention belongs to the technical field of fluorescent ceramic preparation, and relates to an enhanced near-infrared luminescence MgAl2O4: Cr < 3 + > fluorescent ceramic and a preparation method thereof, and the preparation method comprises the following steps: dissolving Mg (NO3) 2.6 H2O, Al (NO3) 3.9 H2O and Cr (NO3) 3.9 H2O in deionized water, then adding urea, stirring and dissolving; transferring the mixed solution into a reaction kettle for hydrothermal reaction to obtain MgAl2O4: Cr < 3 + > powder; adding a sintering aid CaF2 into the MgAl2O4: Cr < 3 + > powder, and carrying out ball milling and mixing; the ball-milled powder is poured into a mold to be compacted and then put into an SPS sintering furnace to be sintered; the sintered ceramic is subjected to annealing treatment; the surface of the annealed ceramic is sequentially subjected to coarse grinding and polishing operation, and the MgAl2O4: Cr < 3 + > fluorescent ceramic is obtained. According to the method, the luminescent property of Cr < 3 + > is remarkably promoted, and meanwhile, the high density and excellent mechanical property of the ceramic are guaranteed.

The invention discloses a preparation method of low-temperature open-pore porous ceramic. The method comprises the following steps: taking one of tailings, metallurgical slag or natural clay minerals as a framework material, taking water-soluble chlorine salt powder as a pore forming agent, and taking waste glass powder as a structural stabilizer; mixing the three components according to a set proportion, carrying out compression molding, and sintering at a temperature lower than 1000 DEG C to obtain a compact ceramic body; and immersing the porous ceramic into water to dissolve out chlorine salt, and drying to obtain the open-pore porous ceramic. According to the preparation method, the solution from which the chlorine salt is dissolved out is evaporated and crystallized, so that the pore-forming agent can be recycled, and recycling is realized. The porous ceramic with a stable structure is prepared at a low temperature, the process is simple, energy is saved, consumption is reduced, the pore-forming agent can be recycled, and the method has the advantages of being environmentally friendly and low in cost.

The invention discloses a texture preparation method for high-performance lead-free piezoelectric ceramics of bismuth ferrite-barium titanate. The general formula of the ceramic composition is as follows, where the molar fraction ratio of BiFeO3 and BaTiO3 is 2:1, x, y, t, and m all represent molar fractions, and 0 < x ≤ 0.05, 0 < y ≤ 0.05, 0 < t ≤ 0.05, 0 < m ≤ 0.05. In the sintering stage of the invention, a temperature gradient field is constructed to make the ceramic grains grow texture-directionally, and a textured piezoelectric ceramic with a piezoelectric constant d 33 reaching above 1000 pC / N at 350 °C and a T dr reaching above 350 °C is obtained. The preparation process of the invention is simple, and the prepared ceramic has excellent high-temperature performance and can be applied to the field of high-temperature piezoelectricity.

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

The invention discloses a method for bonding aluminum nitride ceramics by using inorganic ceramic slurry, which belongs to the technical field of aluminum nitride ceramics, and comprises the following steps: preparing glass powder: preparing fine glass powder with the particle size of 4-6 microns from 5-10% of magnesium oxide, 20-30% of calcium oxide, 20-30% of aluminum oxide and 30-55% of silicon dioxide for later use; preparing laminating slurry: mixing 10%-20% of glass powder, 20%-30% of AlN and 50%-70% of IPA prepared in the previous step to form mixed powder, and then mixing 70%-80% of the mixed powder, 5%-10% of a binder and 15%-20% of TPO to form the laminating slurry; silk-screen printing: putting the prepared laminating slurry on a screen printing plate for printing; and sintering: placing the prepared aluminum nitride shaft on the printed aluminum nitride disc for sintering.

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 application relates to a kind of ceramic materials for 5G medium filter and preparation method thereof.The chemical composition of the ceramic material for 5G medium filter is x CBZS glass-(1-x) Mg 0.95 Ca 0.05 Ti 0.95 (Zn 1 / 3 Nb 2 / 3 ) 0.05 O3, wherein wt%≤x≤wt%;The composition of the CBZS glass includes: 40-60 mol% CaO, 10-25 mol% B2O3, 25-45 mol% ZnO, 10-20 mol% SiO2.

The invention discloses conductive copper paste and a preparation method thereof, and belongs to the technical field of photovoltaic materials. The conductive copper paste takes base metal copper instead of noble metal silver as a core conductive component, and solves the problem of high cost of the existing conductive silver paste. The copper paste comprises the following components in percentage by weight: 72-85% of copper powder, 2.5-8% of glass powder, 8-12% of an organic carrier and 1-9% of an additive, the copper powder is spherical powder with D50: 0.5-5 [mu] m, preferably 1-2 [mu] m; the glass powder is prepared from at least two components such as PbO and SiO2 through a specific process, and the additive comprises an organic antioxidant and an inorganic antioxidant, so that a dual antioxidant system is formed. The special low-temperature glass powder is used for reducing the sintering temperature and blocking diffusion of copper ions, the copper paste is sintered at the high temperature of 500-600 DEG C in the air without inert gas protection in cooperation with a dual-oxidation-resistant scheme, the photoelectric conversion efficiency of the prepared solar cell reaches 26.586% to the maximum and is equal to that of commercially available silver paste, the raw material cost is only 1 / 100 of that of the silver paste, and the application range is wide. And the method adapts to the existing silicon-based battery process, and can realize commercialized large-scale mass production.

The invention relates to the technical field of target materials, in particular to a high-stability tungsten oxide target material for intelligent dimming glass and a preparation method of the high-stability tungsten oxide target material for the intelligent dimming glass. The modified element is at least one of Nb, Ta and Sn; the doping amount of the modified element is 0.5%-5% of the mass of the tungsten oxide matrix. The doping elements (such as Nb < 5 + > and Sn < 4 + >) are similar to W < 6 + > in radius, a stable solid solution is formed, lattice distortion in the ion circulation process is inhibited, microcracks are reduced, and conductivity is enhanced.

This invention relates to the field of dielectric ceramics technology, specifically to a low-dielectric-high-entropy microwave dielectric ceramic with a garnet structure and its preparation method. The chemical composition formula of the low-dielectric-high-entropy microwave dielectric ceramic with a garnet structure is Ca. 3 (Co 0.2 Cu 0.2 Mg 0.2 Zn 0.2 Ni 0.2 ) 2 SiV 2 O 12 By introducing the high-entropy effect into the garnet structure and optimizing the sintering temperature, a Ca with a garnet structure was successfully synthesized. 3 (Co 0.2 Cu 0.2 Mg 0.2 Zn 0.2 Ni 0.2 ) 2 SiV 2 O 12 Pure-phase low-dielectric-high-entropy microwave dielectric ceramics. They exhibit a dielectric constant of 6.5–10.4, a quality factor of 12490–62440 GHz, and a temperature coefficient of resonant frequency of -9.2–-7.4 ppm / ℃. These ceramics possess excellent microwave dielectric properties and have significant practical application value.

This invention relates to the field of electronic packaging substrates, and particularly to an alumina ceramic substrate material, its preparation method, and its application. The alumina ceramic substrate comprises 90-99 wt% alumina and 1-10 wt% sintering aids. The sintering aids have the following composition: xB₂O₃·zSiO₂·yBi₂O₃, where 15≦x≦25, 50≦y≦70, 15≦z≦25, and x+y+z=100, where x:y:z is the mass ratio. The density of the alumina ceramic substrate is ≥3.8 g / cm³. 3 The alumina ceramic substrate of this invention has the following characteristics: surface roughness ≤ 0.35 μm, breakdown strength ≥ 35 kV / mm, bending angle ≥ 350 MPa, and thermal conductivity ≥ 25 W / m·K. It also features high density, uniform microstructure, good surface flatness, high mechanical strength, high breakdown strength, low dielectric loss, and high thermal conductivity.

The invention discloses a coal ash full-amount resource utilization method and a coal ash full-amount resource utilization system for realizing valuable metal extraction. The method comprises the following steps: S1, adding high-alumina coal ash, carbide slag and a composite fluxing agent into a grinding machine, grinding, mixing and screening to obtain a raw material; s2, adding the raw material and water into a press, feeding an obtained formed blank into a roller kiln, carrying out high-temperature calcination, and crushing into fine-particle clinker by a crusher; s3, the fine particle clinker and a sodium carbonate solution are added into a leaching reactor, and an obtained leaching mixed material is fed into a first solid-liquid separation device to be separated into aluminum-rich leaching liquid and aluminum extraction residues; s4, the aluminum-rich leachate and calcium oxide are added into a desilication reactor, and obtained mixed material liquid is fed into a second solid-liquid separation device to be separated into desilication aluminum-rich leachate and aluminum extraction residues; and S5, adding the desiliconized aluminum-rich lixivium and carbon dioxide into a carbon component reactor, and feeding an obtained carbon component mixed material into a third solid-liquid separation device to be separated into aluminum hydroxide and waste liquid. The method can be used for extracting Al (OH) 3 from high-alumina fly ash, and has the advantages of low energy consumption and high purity.

The invention relates to alumina toughened zirconia ceramic powder as well as a preparation method and application thereof. The invention develops a modification preparation method which integrates precise proportioning, multi-stage PH regulation and control, composite coating agent modification and controllable aging process, and definitely adopts a solid-to-liquid ratio of (50-200): (100-1500) (the solid-to-liquid mass ratio is (0.5-2): (1-15)) to ensure the stability of the slurry, so that uniform dispersion of powder, strong interface bonding and collaborative optimization of mechanical properties and chemical stability are realized. Compared with the prior art, the invention has the advantages of good powder dispersibility, strong phase interface bonding, high slurry stability, excellent ceramic mechanical properties and chemical stability, and the like.

The invention relates to the technical field of refractory metal materials, in particular to a fine-grain refractory metal block based on liquid metal and a preparation method and application of the fine-grain refractory metal block. The preparation method comprises the steps that (1) refractory metal powder is subjected to uniaxial compression forming to prepare a refractory metal blank, the surface of the blank is evenly coated with liquid metal, heat preservation permeation treatment is conducted in the protective gas atmosphere, and after the blank is cooled to the room temperature, a precursor sample is obtained; and 2) carrying out rapid heating and cooling treatment on the precursor sample by adopting a Joule heating method, and then carrying out acid leaching, washing, centrifuging and drying on the treated sample. According to the preparation method, a liquid metal induced bond softening strategy is adopted, the refractory metal is rapidly sintered and densified at the temperature far lower than that of a traditional method through a liquid metal medium, meanwhile, a fine grain structure is kept, the preparation method is good in universality and expandability, the liquid metal can be completely removed without residues, and the preparation method is suitable for industrial production. And the prepared refractory metal block can meet the application requirements in extreme environments.

The application discloses a ceramic-based diamond grinding wheel for wafer thinning and a preparation method and application thereof, and comprises ceramic grinding blocks arranged on an aluminum alloy base; the ceramic grinding blocks comprise 20-40% of ceramic binder, 20-40% of diamond micro powder and 30-50% of pore-forming agents in percentage by mass; the ceramic binder comprises 25-50% of silicon oxide, 20-40% of boron oxide, 6-15% of sodium oxide, 6-10% of aluminum oxide, 5-7% of zinc oxide, 4-6% of zirconium oxide, 3-5% of calcium oxide, 1-3% of magnesium oxide, 1-3% of potassium oxide and 0.5-4% of lithium oxide in percentage by mass. The application introduces lithium oxide and zirconium oxide, reduces the local stress of the ceramic binder and diamond compound, and improves the binding force; sodium oxide and potassium oxide are used in cooperation to reduce the ceramic sintering temperature, and the application effectively improves the service performance of the grinding wheel and the production yield.

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 brown fused alumina smelting furnace high-temperature-resistant heat-insulation process which comprises the following steps: pretreating high-alumina bricks, selecting high-quality high-alumina bricks (the content is greater than or equal to 95%) and high-quality high-alumina bricks with high dimensional accuracy and excellent mechanical strength as a substrate material, blending slurry, and carrying out heat insulation and heat insulation. The self-grinding corundum micro powder (accounting for 88%-92% of the total mass of the coating) is selected from the self-grinding corundum micro powder with the content being larger than or equal to 98% and the particle size being 1-10 microns as a core functional raw material, coating and masonry are conducted, the pretreated high-alumina bricks are firstly laid flatly according to a conventional masonry technology, the masonry gap is controlled within 2 mm, oven curing is conducted, after masonry and coating are completed, final curing is conducted through a stepped oven technology, and the high-alumina bricks are manufactured. According to the invention, the self-developed corundum micro powder has excellent low heat conductivity, and a composite heat insulation system formed by the self-developed corundum micro powder and the high-quality high-alumina brick can effectively prevent heat in a smelting furnace from being dissipated outwards, so that the energy loss is greatly reduced.

This invention relates to nano-copper paste based on the host-guest interaction of columnar aromatic hydrocarbons, its preparation method, and its application, belonging to the field of conductive copper paste technology. The nano-copper paste based on the host-guest interaction of columnar aromatic hydrocarbons of this invention comprises, by weight, the following components: 92-95 parts of columnar aromatic hydrocarbon supramolecular assembly-coated nano-copper powder, 4-8 parts of resin, 2-6 parts of organic solvent, 0.1-1 parts of thixotropic agent, 0.1-1 parts of dispersant, 0.1-1 parts of coupling agent, and 0.1-1 parts of other additives. The columnar aromatic hydrocarbon supramolecular assembly-coated nano-copper powder has a core-shell structure, with the host-guest complex as the shell and the nano-copper powder as the core; the host-guest complex is based on columnar aromatic hydrocarbons grafted with glycidyl methacrylate as the host and benzyl trialkyl quaternary ammonium salt as the guest; the guest is connected to the surface of the nano-copper powder through coordination bonds. The nano-copper paste of this invention has the characteristics of good conductivity, low sintering temperature, strong adhesion, and excellent antioxidant properties.

The application belongs to the technical field of conductive ceramic materials, and particularly relates to a conductive ceramic material and a preparation method and application thereof. According to mass parts, the conductive ceramic material comprises the following components: 79-97 parts of beta-aluminum oxide, 0.5-2 parts of yttrium oxide, 0.7-3 parts of thorium oxide, 1-8 parts of zirconium oxide, 0.5-2 parts of molybdenum dioxide, 0.2-3 parts of copper oxide and 0.1-3 parts of zinc oxide. Due to the introduction of high-activity aluminum oxide nano powder and yttrium oxide, the sintering temperature can be greatly reduced, the energy consumption is reduced, the preparation cost is reduced, the competitiveness is improved, and the application is conducive to popularization.

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 application discloses a TGV interlayer-copper paste interconnection-high thermal conductivity and low loss insulation material collaborative packaging structure for three-dimensional integrated circuit packaging and a preparation method thereof, and belongs to the technical field of advanced electronic packaging materials. The structure comprises a TGV glass interlayer with low dielectric and adjustable thermal expansion coefficient, a high-uniformity metal interconnection structure formed by filling and sintering of functional copper paste, and a high-thermal-conductivity and low-loss insulation packaging layer. Through collaborative design of the interlayer material, the copper paste interconnection material and the insulation packaging material, excellent high-frequency electrical performance, thermal management performance and structural reliability can be realized. The application has simplified process and controllable cost, and is suitable for three-dimensional packaging application scenarios such as AI accelerators, high-performance computing, radio frequency front ends and heterogeneous integration.

The invention relates to a method for producing sodium aluminate and iron-nickel alloy by mixing and roasting red mud and laterite-nickel ore with low aluminum-silicon ratio by using aluminum powder as a reducing agent, which comprises the following steps of: adding metal aluminum powder coated with an aluminum-oxygen binder as the reducing agent into a mixture of the red mud and the laterite-nickel ore, uniformly stirring, adding water and carbon dioxide, quickly and uniformly stirring, preparing into particles, and roasting, thereby obtaining the sodium aluminate and iron-nickel alloy. After roasting, grinding into powder, carrying out magnetic separation to obtain powder containing iron and nickel, and carrying out electric melting to prepare iron-nickel alloy; and adding sodium carbonate and calcium carbonate into the iron-free nickel powder separated by magnetic separation, stirring, then carrying out electric melting sintering, adding a sodium hydroxide solution into the sintered solid, grinding together, and carrying out solid-liquid separation after grinding to obtain a liquid which is a sodium aluminate solution. The method solves the problem that the aluminum-silicon ratio of the laterite-nickel ore in the roasting process is too low, so that nickel recovery is affected, the nickel oxide and iron oxide low-magnetic goethite structure and the aluminum oxide and silicon oxide mullite structure are changed, the recovery rate of iron, nickel and aluminum oxide is greatly increased, no waste liquid or solid waste is discharged, and the method has the advantages of energy conservation and consumption reduction at low roasting and sintering temperature.

The application discloses a barium titanate-based dielectric energy storage ceramic material with low loss and high energy storage efficiency and a preparation method thereof. The barium titanate-based dielectric energy storage ceramic material belongs to the field of dielectric functional ceramics and has a chemical composition of 0.85[0.88BaTiO3-0.12Bi 2 / 3 Mg 1 / 3 Ta 2 / 3 O3]‑0.15CaZrO3+xwt.%MnO2: wherein 0.5≤x≤2, x is a molar percentage, and the barium titanate-based energy storage ceramic doped with multi-ions Bi 3+ , Mg 2+ , Ta 5+ , Ca 2+ , Zr 4+ and MnO2 with different mass percentages has excellent energy storage efficiency and density, low loss, and is used for dielectric capacitors, and thus can be used in the fields of electronic power, military industry and high-energy pulse power technology.