268results about How to "Lower sintering temperature" patented technology

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 a low-temperature fast-fired ceramic green body, a high-strength ceramic tile and a preparation method of the high-strength ceramic tile. The ceramic green body is prepared from the following raw materials in parts by weight: 8-15 parts of ball clay, 1-8 parts of bentonite, 1-8 parts of black talc, 60-70 parts of vanadium-titanium slag, 8-15 parts of kaolin and 0.3-0.5 part of a green body dispergator. According to the invention, a large amount of vanadium-titanium slag is introduced into a ceramic blank formula, so that barren raw materials in the blank can be completely replaced, exhaustion of mineral resources is slowed down, the utilization rate of the vanadium-titanium slag is greatly improved, resource waste is avoided, and a low-aluminum blank formula system enhanced by metal oxide is formed; the sintering temperature of the green body can be greatly reduced, the water absorption rate of the product is reduced, the sintering period is shortened, and a low-temperature fast-firing ceramic production process is realized.

The invention belongs to the technical field of preparation of electrode materials, and particularly relates to a high-tap-density spherical ferric sodium pyrophosphate electrode material and a preparation method thereof. According to the preparation method, a uniform precursor is prepared by utilizing solution gel, and a strategy of combining spray drying with secondary sintering is adopted, so that uniform carbon coating and doping modification of ferric sodium pyrophosphate can be successfully realized, and the strategy provides an important experimental basis for an industrialization process of a sodium ion battery. And the method has great potential of large-scale preparation.

The invention provides a method for preparing a ceramic bond through solution heat preservation and a superhard grinding tool. The ceramic bonding agent prepared through a solution heat preservation method is fine in powder granularity and low in sintering temperature and contains a certain amount of crystals, the bonding agent has high impact resistance and self-sharpening performance due to existence of the crystals, and the prepared superhard ceramic grinding tool has the performance of high strength and good sharpness. The method has the advantages of short binding agent preparation period, low equipment investment cost, simplicity in operation and the like. The preparation method of the ceramic bond provided by the invention is not reported.

The invention discloses a method for realizing pure pore size regulation and control of a silicon carbide ceramic membrane, which comprises the following steps of: a) adding silicon carbide, sodium carboxymethyl cellulose and a dispersing agent into water, and uniformly ball-milling to obtain spraying slurry; and b) spraying the spraying slurry to the surface of a silicon carbide ceramic membrane to be regulated and controlled, naturally airing, carrying out vacuum drying at 75-85 DEG C for 2-5 hours, putting into a high-temperature furnace, carrying out vacuum sintering at 800-1200 DEG C for 1-3 hours, putting into a muffle furnace, and carrying out oxidation sintering at 700-900 DEG C for 25-45 minutes. According to the method, the pore size of the silicon carbide ceramic membrane can be subjected to pure regulation and control, operation is easy, cost is low, large-scale production is easy to achieve, the influence on the thickness of an original membrane is small, the membrane layer firmness is good, the filter flux of pure water is still high, and the application value of the silicon carbide ceramic membrane in water treatment is remarkably improved.

The invention provides a method for regenerating alkali lignin into a sodium-ion battery negative electrode material, which comprises the following steps: carrying out heat treatment on alkali lignin to obtain alkali lignin biochar; adding the alkali lignin biochar into a metal ion-containing aqueous solution containing Cd < 2 + > and Zn < 2 + >, and adsorbing Cd < 2 + > and Zn < 2 + > in the metal ion-containing aqueous solution by using the alkali lignin biochar to obtain alkali lignin biochar adsorbed with heavy metals; and placing the alkali lignin biochar adsorbed with the heavy metals and a sulfur source in a furnace body, introducing inert gas into the furnace body to maintain the inert atmosphere in the furnace body, and sintering to obtain the sodium ion battery negative electrode material Cd and Zn-loaded sulfide of the alkali lignin biochar, the gas flow direction of the inert gas is from the sulfur source to the alkali lignin biochar. The sodium-ion battery negative electrode material regenerated by the method has good electrochemical performance and good application prospect; and the method can realize resource utilization of the alkali lignin, and the required raw materials are rich, the sintering temperature is low, and the required energy consumption is low, so that the regeneration cost is low, and wide application can be realized.

The invention discloses a method for preparing a porous ceramic filter ball from electrolytic manganese residues, and relates to the technical field of environmental protection and ceramic materials, and the method comprises the following steps: (1) raw material treatment: crushing the electrolytic manganese residues into particles of 2-3 cm, drying by using a dryer, and after drying, carrying out ball milling and sieving on the electrolytic manganese residues by using a planetary ball mill to obtain a raw material; (2) weighing and proportioning raw materials: weighing and proportioning the raw materials in percentage by weight: 50-80% of electrolytic manganese residues, 20-50% of calcined kaolin, 0-10% of an additional cosolvent and 0-10% of a pore-forming agent; (3) mixing the raw materials; and (4) granulating and aging the mixture. According to the method for preparing the porous ceramic filter balls from the electrolytic manganese residues, a brand new path is developed for comprehensive utilization of the electrolytic manganese residues, the path enables the utilization rate of the electrolytic manganese residues to be greatly increased, the path becomes an extremely effective path for consuming the electrolytic manganese residues, the electrolytic manganese residues can be fully utilized due to the characteristic of high utilization rate, and efficient cyclic utilization of resources is achieved.

The invention belongs to the field of sodium ion solid electrolyte manufacturing, and particularly relates to a terbium-doped NASICON type sodium ion conductor material and a preparation method thereof. The stoichiometric formula of the terbium-doped NASICON-type sodium ion conductor material is Na < 3 + x > Zr < 2-x > Tb < x > Si < 2 > PO < 12 >, x is more than 0 and less than or equal to 0.3, and the total ionic conductivity of the terbium-doped NASICON-type sodium ion conductor material is 3.07 * 10 <-4 > S / cm to 1.02 * 10 <-3 > S / cm. Compared with the prior art, a proper amount of terbium ions are used for replacing skeleton ions (such as Zr < 4 + >) in an NASICON structure, so that the concentration of transferable sodium ions is increased, and the ionic conductivity is improved. By doping terbium ions, the size of a sodium ion transmission channel is effectively increased, the transmission energy barrier is reduced, and the ionic conductivity is further improved. The ionic conductivity of the Na < 3.2 > 2Zr < 1.8 > Tb < 0.2 > Si2PO12 electrolyte doped with terbium ions at the room temperature reaches 1.02 * 10 <-3 > S / cm. According to the invention, the selected raw materials are economical and practical oxides, and the raw materials are easy to purchase and low in price, so that the production cost can be reduced.

The invention discloses a preparation method of a high-purity corundum crucible for high-temperature alloy smelting, belongs to the technical field of precision casting refractory material forming preparation, and aims to solve the problems that an Al2O3 crucible is easily eroded by high-temperature alloy, impurities are generated during high-temperature alloy smelting, and the Al2O3 crucible is difficult to be suitable for high-temperature alloy smelting. According to the technical key points, 60%-70% by mass of aluminum oxide Al2O3 powder and 30%-40% by mass of silicon oxide SiO2 powder are added into a ball milling tank to be subjected to ball milling treatment, the aluminum oxide Al2O3 powder comprises fine powder mixed powder with the particle size being 5-50 micrometers, medium powder mixed powder with the particle size being 50-300 micrometers and coarse powder mixed powder with the particle size being 0.4-0.5 mm, and the coarse powder mixed powder is mixed with the medium powder mixed powder with the particle size being 2-5 micrometers. A binder polyvinyl alcohol (PVA) solution is added into the mixed powder for granulation operation, after the mixed material is aged, the mixed material is pressed in a cold isostatic pressing mode, a crucible preformed blank is obtained and sintered at different temperatures after being dried, and the crucible is obtained. The method has the effect that the sintered high-purity corundum crucible has excellent high temperature resistance and thermal stability at the same time.

The invention relates to the field of battery electrode materials, in particular to a doped lithium aluminum titanium phosphate solid electrolyte material, a preparation method and a lithium ion battery containing the doped lithium aluminum titanium phosphate solid electrolyte material. The chemical composition of the doped solid electrolyte material is Li1 + zMyAlxTi2-x-yP3O12-bFa, wherein x is greater than or equal to 0 and less than or equal to 0.4, a is greater than or equal to 0 and less than or equal to 0.8, and b is greater than or equal to 0 and less than or equal to 0.8. Z is less than or equal to 0.8, and M is one or more of Zn, Mg, Ca, Sr, Si and Sn. Raw materials containing doping elements are added in the process of preparing lithium titanium aluminum phosphate (LATP), doping type lithium titanium aluminum phosphate is synthesized through calcination, then crushing and smashing are conducted, and the solid electrolyte material with high conductivity and particle density is obtained. According to the solid electrolyte material, the ionic conductivity and the particle density are improved, and the requirements of the market for high ionic conductivity and high particle density are met; the preparation method and modification steps are simple, the period is short, and the method is suitable for industrial large-scale production.

The invention relates to the technical field of refractory materials, in particular to a preparation method of a zirconite ramming material for a glass kiln. Zirconite is adopted as refractory aggregate, fused cast fused alumina zirconia micro powder is adopted as refractory powder, aluminum oxide is adopted as an additive, a silica sol-aluminum oxide composite cementing agent replaces traditional silicate to serve as a binding agent, and the ramming material for the glass kiln is prepared through burdening, mixing, forming, drying and sintering. The zircon ramming material obtained through the process is low in sintering temperature, compact in structure, low in apparent porosity and high in strength, the technical standard of the zircon ramming material is met, the construction efficiency of a construction site is improved, and the cost of the zircon ramming material is reduced.

The invention discloses a zinc-based oxide target material as well as a preparation method and application thereof. The zinc-based oxide target material comprises the following raw materials: indium oxide, gallium oxide, tin oxide and zinc oxide quantum dots. The indium oxide quantum dots, the gallium oxide quantum dots, the tin oxide quantum dots and the zinc oxide quantum dots serve as preparation raw materials of the target material, the sintering temperature can be effectively reduced, the density of the target material is improved, and the volatilization rate is reduced. A thin film prepared from the zinc-based oxide target material has higher stability and high mobility.

The invention discloses a preparation method of a gallium and zirconium co-doped zinc oxide target material, and relates to the technical field of target materials, the preparation method comprises the following steps: S1, uniformly mixing zirconium oxide, gallium oxide, water and a dispersing agent, and grinding to obtain slurry I; s2, uniformly mixing zinc oxide, water and a dispersing agent, adding the slurry I, uniformly mixing, adding a binder and a plasticizer, uniformly mixing, and grinding to obtain slurry II; s3, performing spray drying and granulation on the slurry II, and sieving to obtain granular powder; s4, the granular powder is subjected to hydraulic pressure and cold isostatic pressing forming, and a plain blank is obtained; and S5, sintering the blank, and cooling to obtain the gallium-zirconium co-doped zinc oxide target material. The gallium and zirconium co-doped zinc oxide target material prepared by the preparation method disclosed by the invention has relatively high relative density and relatively low resistivity; after magnetron sputtering, the obtained film has good electrical properties.

The invention relates to ceramic slurry, a ceramic substrate and a preparation method thereof, and belongs to the technical field of ceramic materials. The ceramic slurry provided by the invention comprises the following components in parts by weight: 85-90 parts of aluminum oxide powder, 6-15 parts of heat-conducting powder, 1-7 parts of a plasticizer, 3-9 parts of a sintering aid, 2-6 parts of a dispersing agent, 2-5 parts of a viscosity modifier and 10-15 parts of a solvent, the heat-conducting powder comprises aluminum nitride, zirconium oxide and beryllium oxide; the sintering aid is prepared from TiN, ZrO2 and CaC2. According to the invention, the heat-conducting powder and the sintering aid are added into the ceramic slurry, and are reasonably proportioned with other components, so that the high-heat-conductivity and high-strength ceramic substrate is obtained.

The invention belongs to the technical field of composite materials, and particularly relates to a silicon carbide-based composite material with high conductivity and high toughness as well as a preparation method and application of the silicon carbide-based composite material. The silicon carbide-based composite material is composed of a SiC matrix containing an alpha-phase and beta-phase double-phase structure and eutectic high-entropy alloy distributed in a network shape. The two components cooperate with each other, so that not only are high conductivity and high toughness effectively considered, but also the sintering temperature can be reduced, the compactness of the material is improved, and the material performance is comprehensively optimized. According to the invention, beta-SiC powder and eutectic high-entropy alloy powder are adopted as raw materials, and sintering is carried out in a vacuum atmosphere by using a discharge plasma sintering furnace. The preparation method is simple in process and can be realized without complicated equipment or process; meanwhile, the high-temperature structural ceramic material has relatively high practicability, is suitable for other high-temperature structural ceramic materials, and shows a wide application prospect.

The present invention discloses a nickel-doped enhanced aluminum nitride ceramic and a preparation method thereof, and relates to the technical field of ceramic additive manufacturing. In the preparation method of the nickel-doped enhanced aluminum nitride ceramic provided by the present invention, the nickel powder is first demagnetized at high temperature before nickel is added, thereby avoiding the influence of the ferromagnetism of nickel metal on the performance of the ceramic substrate; further introducing an oxide-type sintering aid can reduce the sintering temperature of the nickel-doped aluminum nitride, thereby avoiding the high temperature required during sintering causing certain hidden dangers to the equipment and workers, and helping to prepare aluminum nitride ceramics with high density, fine grains, and uniform microstructure; (3) In the preparation method of the present invention, by post-processing the sintered aluminum nitride ceramics with hot isostatic pressing, its bending strength can be further improved, thereby preparing the nickel-doped enhanced aluminum nitride ceramics.

The invention relates to the technical field of soft magnetic ferrite materials, and particularly discloses a NiCuZn-MgO composite material and a preparation method thereof. The NiCuZn-MgO composite material comprises main components and additives, and the main components comprise the following components in percentage by weight: 36-72 wt% of Fe2O3, 13-16 wt% of ZnO, 6-9 wt% of NiO, 3-6 wt% of MgO and the balance of CuO; based on the total weight of the main components, the additive comprises the following components in percentage by weight: 0.5 to 1.5 weight percent of Bi2O3, 0.3 to 1.5 weight percent of SiO2 and 0.3 to 1.5 weight percent of CaO. According to the NiCuZn-MgO composite material prepared by the invention, the cost of soft magnetic ferrite can be reduced, and the NiCuZn-MgO composite material has high magnetic conductivity and high Bs.

The invention belongs to the technical field of photovoltaic target materials, and particularly relates to an indium titanium cerium niobium oxide ceramic target material, a preparation method and application thereof, and a transparent conductive oxide film. The indium titanium cerium niobium oxide ceramic target material comprises the following components: indium oxide, titanium oxide, cerium oxide and niobium oxide, the mass ratio of indium oxide to titanium oxide to cerium oxide to niobium oxide is 97-99: 1-0.3: 1-0.3: 1-0.2, the transparent conductive oxide film has high density, high purity and high strength, and the transparent conductive oxide film prepared from the transparent conductive oxide film has high carrier mobility, high conductivity and high light transmittance.

The invention relates to the technical field of conductive silver paste, and discloses high-thixotropy conductive silver paste and a preparation method thereof. The prepared conductive silver paste is prepared by taking spherical silver powder and modified flake silver powder as a conductive phase and glass powder as an inorganic binding phase, and adding an organic carrier, mixing and stirring. Compared with the flake silver powder, the modified flake silver powder has better conductivity, and has better and more stable dispersity in a matrix; the modified polyurea and the hydroxy acrylic resin are introduced into the organic carrier, and the thixotropy and the adhesive force of the silver paste are improved through the synergistic effect of the modified polyurea and the hydroxy acrylic resin. Therefore, the conductive silver paste has good application prospects in the fields of electronic products, solar cells and the like.

The invention relates to a fly ash sintered material with high fly ash mixing amount and a preparation method and application thereof. The method comprises the following steps: uniformly mixing silicon powder, alkali, water and a dispersing agent, and stirring and reacting at 75-95 DEG C for 4-12 hours to obtain a special silicon aggregate solution; uniformly mixing a sintering aid and the waste incineration fly ash to obtain solid powder, and then putting the solid powder and the special silicon aggregate solution into a forming and granulating device for forming and granulating to obtain formed particles; the waste incineration fly ash is calcined for 0.2-1.2 h in high-temperature treatment equipment at the temperature of 600-900 DEG C, the fly ash sintered material is obtained, the mass fraction of the waste incineration fly ash in the fly ash sintered material is 70-85%, and the mass fraction of the sintering aid is 2-5%; according to the method, the high doping amount of the waste incineration fly ash can be achieved in the fly ash sintering heat treatment process, the sintering temperature can be reduced, and the fly ash sintered material with the heavy metal leaching toxicity reaching the standard and the strength reaching the standard can be obtained by conducting low-temperature sintering treatment on the waste incineration fly ash with the high fly ash doping amount.

The invention belongs to the field of electronic packaging, and relates to a nano-copper metal material for low-temperature sintering conductive paste and preparation and application of the paste of the nano-copper metal material. The nano-copper metal material comprises copper nanoparticles and copper nanowires, and the copper nanoparticles and the copper nanowires are both prepared through a one-step hydrothermal method: (1) the copper nanoparticles are prepared, specifically, the high-purity copper nanoparticles are obtained through a hydrothermal reaction by adjusting the pH value; (2) preparing a copper nanowire: carrying out hydrothermal reaction on a copper source, a reducing agent and an end-capping reagent, so that copper ions are reduced into quintuple twin crystal seeds in one step and further directionally deposited into the copper nanowire; and (3) preparing conductive paste: mixing the nano-copper material and an organic reagent according to a certain proportion, and homogenizing to obtain the low-temperature sintering type conductive copper paste. The low-temperature copper paste is used for preparing the low-temperature copper paste for bonding a chip and a substrate. The prepared nano-copper metal material for the low-temperature sintering conductive paste is stable in size and simple in preparation process, and the prepared paste is good and excellent in sintering performance (the shear strength is 25 MPa, and the thermal conductivity is 4 W / m.K).

The invention discloses a preparation method of a CuAlO2-phase-based alumina-based conductive ceramic, and belongs to the technical field of preparation of nano conductive ceramics. The invention relates to a method for converting aluminum oxide ceramic into a novel electric heating element from an insulator by adding a semiconductor component CuAlO2 phase in the aluminum oxide ceramic and continuously distributing the CuAlO2 phase along an aluminum oxide crystal boundary through a process to form a conductive path, which comprises the following steps of: mixing CuO, SiO2, Al2O3 and the like according to a certain proportion, and carrying out ball milling; and the novel aluminum oxide electric heating body is formed after tabletting and sintering. According to the method, the sintering temperature of the aluminum oxide ceramic can be greatly reduced, and complicated processes and equipment are not needed, so that the novel aluminum oxide conductive heating ceramic is low in energy consumption, simple in process, low in equipment requirement and excellent in product performance, and the price of a novel heating body is expected to be greatly reduced.

The invention relates to a high-etching-resistance yttrium-magnesium complex-phase transparent ceramic and a preparation method and application thereof.The preparation method comprises the following steps that magnesium oxide and yttrium oxide are mixed according to a preset proportion to obtain a base material, yttrium-containing fluoride is added to serve as a sintering aid, the adding mass of the yttrium-containing fluoride accounts for 1-10% of the mass of the base material, and the base material is sintered to obtain the high-etching-resistance yttrium-magnesium complex-phase transparent ceramic; forming a multiphase ceramic green body; and sintering the multiphase ceramic green body in an inert oxygen-free atmosphere to obtain the yttrium-magnesium multiphase transparent ceramic with high etching resistance, the etching depth of the yttrium-magnesium multiphase transparent ceramic with high etching resistance is 300 to 500 nm / h. Compared with the prior art, the yttrium-containing fluoride is adopted as the sintering aid, a stable protective fluorinated layer is formed on the surface of the ceramic, the etching resistance of the ceramic is improved, meanwhile, the risk of decomposition and impurity introduction in an etching environment is avoided, and the high-etching-resistance yttrium-magnesium complex-phase transparent ceramic is particularly suitable for etching equipment in semiconductor manufacturing.

The invention provides a preparation method of an ErBCO superconducting target, and belongs to the technical field of oxide target materials.The preparation method comprises the steps that firstly, erbium nitrate, barium nitrate, copper nitrate, high-purity water, a dispersing agent and a binding agent are sequentially mixed, and then mixed powder is obtained through segmented ball milling and spray granulation; then the ErBCO superconducting target material is prepared through the method that the mixed powder is sequentially subjected to calcination, cold sintering and drying treatment, the effect of reducing the cost while the performance such as the density of the target material is improved is achieved through the cold sintering process, and the ErBCO superconducting target material has the advantages that the ceramic sintering temperature is remarkably reduced, and the sintering time is remarkably shortened.

The invention relates to the technical field of dielectric energy storage device materials, in particular to high-entropy designed bismuth ferrite-based energy storage ceramic as well as a preparation method and application thereof, the chemical composition formula of the material is (0.7-x) Bi < 0.9 > (Sm < 0.5 > Gd < 0.5 >) < 0.1 > FeO < 3-0.3 > (Sr < 0.5 > Ba < 0.5 >) TiO < 3-x > NaNbO < 3-y > MnO < 2 >, the value range of x is 0-0.15, and the value range of y is 0-0.005. The relaxation ferroelectric material is designed by adopting a high-entropy strategy, and various elements occupy the same site of the material to generate lattice distortion, so that the relaxation characteristic of bismuth ferrite-based ceramic is promoted, and a ferroelectric hysteresis loop is optimized. The NaNbO3 anti-ferroelectric material is introduced, the long-range ferroelectric order is destroyed, the local random field is enhanced, and a low Pr value can be obtained. And in addition, the concentration of oxygen vacancies can be reduced by properly adding 0.5% mol of MnO2, so that the leakage current of the material is reduced, the energy storage efficiency is improved, and the material design not only enriches the application field of the high-entropy ceramic, but also provides a new thought for improving the performance of the energy storage ceramic.

The invention discloses a green low-carbon functional coal gangue lightweight aggregate, and belongs to the technical field of lightweight aggregates for buildings, the coal gangue lightweight aggregate comprises the following raw materials by weight: 86.4-89.1 parts of coal gangue, 9.6-9.9 parts of fly ash, 1-4 parts of a pore forming agent, and 6-7 parts of a water glass solution; the pore-forming agent is composed of calcium carbonate, manganese dioxide and a lanthanum-zirconium metal organic framework, and the mass ratio of the calcium carbonate to the manganese dioxide to the lanthanum-zirconium metal organic framework is 1: 1: (1-2); according to the invention, the industrial solid waste coal gangue is used as a main raw material, the fly ash is used as an auxiliary raw material, and the pore-forming agent is used, so that the lightweight and high-strength coal gangue lightweight aggregate is obtained, the utilization rate of the coal gangue is more than 80%, and a new path is provided for large-scale resource utilization of the solid waste coal gangue and high-performance preparation of the lightweight aggregate.

The invention belongs to the technical field of aluminum oxide ceramics, and particularly relates to a high-strength 99 aluminum oxide ceramic as well as a preparation method and application thereof. The boehmite and the hydrotalcite are used as main components of a binder, the boehmite and hydrotalcite composite sol is obtained by adopting a specific preparation method, and the boehmite and hydrotalcite composite sol is applied to a preparation process of aluminum oxide ceramics, so that an aluminum oxide ceramic material with high strength and high density can be obtained. Besides, the sintering aid adopted by the invention can react with MgO and Al2O3 generated by decomposition in the binder to generate a low-melting-point liquid phase, so that redistribution of substances among particles and filling of pores are facilitated, and the density and the dielectric property are further improved.

The invention relates to the technical field of ceramic preparation, and particularly discloses an enhanced aluminum oxide ceramic substrate and a preparation method thereof. The enhanced aluminum oxide ceramic substrate is prepared from the following raw materials in percentage by weight: 0.005 to 0.01 percent of magnesium oxide, 0.020 to 0.025 percent of yttrium oxide, 65 to 70 percent of solvent, 1.5 to 2.5 percent of dispersing agent, 4 to 6 percent of plasticizer, 5 to 7 percent of binder and 0.7 to 0.9 percent of surfactant which are added on the basis of the weight of the modified aluminum oxide. The enhanced aluminum oxide ceramic substrate prepared by the preparation method has excellent electrical insulation performance and relatively high thermal conductivity, chemical stability and mechanical strength, and the obtained aluminum oxide ceramic substrate has relatively good density, mechanical property and thermal stability by mixing various raw material components.

The invention discloses high-density printed circuit board interconnection copper paste, a preparation method and an interconnection process, the interconnection copper paste comprises the following components in parts by weight: 30-90 parts of micron copper powder, 10-80 parts of nano copper powder, 4-10 parts of an organic solvent, 0.01-2 parts of a thickening agent and 0.5-3 parts of a corrosion inhibitor, and the nano copper powder is nano copper powder coated by an organic coating agent. According to the interconnection copper paste, the specially treated nano copper powder is applied, the high-activity nano copper powder is pre-melted at the high temperature of 180 DEG C or above under the normal pressure, meanwhile, the corrosion inhibitor introduced into the formula effectively removes an oxide layer in the baking process, good bonding with a copper bonding pad is achieved, and the high pressing yield can be achieved.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a nickel-zinc ferrite material as well as a preparation method and application thereof. The invention provides a nickel-zinc ferrite material. The nickel-zinc ferrite material comprises the following raw materials: main components and auxiliary components, wherein the main components comprise Fe2O3, NiO, ZnO and CuO; the mass percentage of Fe2O3 in the main component is 64.05 to 68.72 wt%, the mass percentage of NiO in the main component is 14.12 to 17.36 wt%, the mass percentage of ZnO in the main component is 11.61 to 15.02 wt%, and the mass percentage of CuO in the main component is 3.82 to 4.45 wt%; based on the total weight of the main components, the auxiliary components comprise 0.2 wt%-0.6 wt% of Al2O3, 0.05 wt%-0.25 wt% of SiO2 and 0.1 wt%-0.35 wt% of MnO2. According to the nickel-zinc ferrite material, specific main components and auxiliary components are selected, and the contents of the main components and the auxiliary components are limited, so that all the components generate a synergistic effect, and finally the nickel-zinc ferrite material with excellent comprehensive performance is obtained.