53results about How to "Sintered to achieve" patented technology

The invention discloses a method for preparing a radioactive waste solidified body. The method is characterized by comprising the following steps of: finely grinding a raw material which comprises 9.53 to 29.41 weight percent of ZrSiO4, 23.36 to 32.12 weight percent of CaCO3, 31.07 to 38.46 weight percent of TiO2, 0 to 15.66 weight percent of Nd2O3, 0 to 29.09 weight percent of CeO2 and 0 to 3.97 weight percent of Al2O3; drying the raw material; and adding polyvinyl alcohol sol, granulating, screening, molding, discharging the sol, performing vacuum hot-pressing sintering, and thus obtaining the radioactive waste solidified body. By adoption of the method, the raw material is low in cost, a high-purity and high-density perovskite acorite and titanite combined mineral solidified body is prepared at low temperature by using a simple and practical hot-pressing sintering technology, and foundation is laid for engineering application to artificial rock solidification treatment of high-level waste.

The invention discloses a ceramic dielectric material matched with a nickel inner electrode and a production method of a capacitor produced by the ceramic dielectric material. The ceramic dielectric material consists of a main crystal phase, a property-modifying additive and a sintered fluxing agent, wherein the main crystal phase is MgZrxSi(1-x)O3, and x is more than or equal to 0.05 and less than or equal to 0.15; the property-modifying additive is one or more of MnO2, Al2O3, CaO, Bi2O3 and TiO2; and the sintered fluxing agent is one or more of B2O3, SiO2, ZnO, Li2O, K2O and BaO. The ceramic dielectric material can meet the COG characteristic in the EIA standard, has good uniformity, uniform particle size distribution, high dispersibility, good molding technique and excellent dielectricproperty and meets the environmental requirement. When the material is used for making a multi-layer chip ceramic capacitor (MLCC), the material and the nickel electrode can be matched and sintered under the reducing atmosphere, the crystal particles of a ceramic body after sintering can grow uniformly and densely, the dielectric layer can be well matched with the inner electrode, and the productperformance is stable.

The invention refers to a method for preparation of zirconium diboride block material. The method is about a discharging plasma sinter high-integrity zirconium diboride block material, the character is lies in it includes steps as follows: directly posting coated format ZrB2 in graphite mould, and then putting mould in discharging plasma sintering furnace, applying axial pressure of 10- 50MPa, adopting vacuum condition or interia atmosphere which vacuum degree is less than 10Pa, sintering in sintered temperature of 1600- 2200Deg C, heating-up with rate of 50-500Deg C/min, heat preserving for 1-30min, cooling under 1300Deg C with cooling rate of 10-100Deg C/min, finally furnace cooling to room temperature, getting high degree of compactness zirconium diboride block material. The produced zirconium diboride block materials have high degree of compactness, hardness, high-temperature strength and oxidation resistance capability.

The invention belongs to the technical field of ceramic substrates, and particularly relates to a high-power LED (Light-Emitting Diode) heat dissipation ceramic substrate. The ceramic substrate comprises the following materials in percentage by mass: 70-80 percent of alumina powder, 3-8 percent of melamine, 3-6 percent of hydroxymethyl cellulose, 6-10 percent of deionized water and 5-10 percent of composite sintering aid, wherein the composite sintering aid comprises the following materials in percentage by mass: 40-60 percent of silicon powder, 5-10 percent of aluminum powder, 20-30 percent of kaolin powder and 10-30 percent of calcium fluoride. The ceramic substrate has the advantages of high heat conductivity coefficient, excellent heat resistance, high bending strength and avoidance of the phenomena of bending, wrapping and the like. Through adoption of an appropriate sintering method and selection of an appropriate sintering aid, denseness of an alumina ceramic sintered body is realized, and the heat conductivity of alumina ceramics is increased greatly.

The invention discloses a low-carbon and low-NOx sintering method based on reasonable distribution of fuel. According to the low-carbon and low-NOx sintering method based on reasonable distribution offuel, a lower fuel layer is mainly fed with new fuel which is high in burning speed, relatively low in heat value and low in nitrogen content, an upper fuel layer is fed with fossil fuel which is lowin burning speed and high in heat value, flue gas with high in CO content in an intermediate air bellow of a sintering machine is circulated to a sintered material surface at the same time, and latent heat of the flue gas is fully utilized for further supplementing heat to the upper fuel layer. According to the low-carbon and low-NOx sintering method based on reasonable distribution of fuel, thecharacteristics that the sintering speed changes from low to high from the upper fuel layer to the lower fuel layer, and heat storage changes from low to high, the difference between the burning speedof the new fuel and the fossil fuel, and the difference between the heat value of the new fuel and the fossil fuel are effectively coupled, the CO latent heat in the fuel gas is efficiently utilized,and at the same time of increasing sintering yield and improving quality indexes, solid fuel consumption of each ton of sinter is reduced by 2kgce to 4 kgce, CO emission is reduced by 30% to 50%, NOxemission is reduced by 40% to 60%, and low-carbon and low-NOx sintering is implemented.

The invention provides an agglomeration method and device configurable firmware, wherein the collocating method comprises: obtaining the subchain information to be agglomerated based on a single-plate identification ID by a controller ETC, wherein the subchain information at least comprises the corresponding connection relationship between a device pin and a configurable firmware; based on the subchain information, a boundary scanning unit BSC in the ETC control device pin simulating the interface time sequence of the configurable firmware and realizing the agglomeration of the configurable firmware based on the simulated interface time sequence. The agglomeration method and device can solve the problem that the error ratio is higher due to the single-plate configurable firmware solidified using a manual agglomeration tool, furthermore the error in the action of the system is reduced.

The invention discloses a dual-alloy nanocrystal rare earth permanent magnet and a preparation method therefor. The preparation method comprises the following steps of (1) preparing rapidly quenched ARE-Fe-B magnetic powder, wherein the content of ARE is greater than or equal to 12%, and ARE is selected from one or more than two kinds of mixed rare earths of La, Ce and Y; and preparing rapidly quenched PRE-Fe-B magnetic powder, wherein the content of Fe is greater than or equal to 82%, and PRE is rare earth Nd and/or Pr; and (2) performing mixing on the above-mentioned two kinds of magnetic powder, and carrying out discharge plasma sintering to obtain the isotropous nanocrystal rare earth permanent magnet. By taking the low-cost rare-earth-rich alloy and earth-earth-less iron-rich nanometer composite alloy as the raw materials of the magnetic powder, the material cost of the magnet is lowered; the sintering performance and the thermal deformation performance of the ally are improved; by virtue of the discharge plasma sintering technology, quite high fusion between the two kinds of magnetic powder with relatively high performance difference is realized, so that a magnetic hysteresis loop with single-alloy magnet characteristic is obtained; and in addition, by improving the square degree of the loop, the magnetic performance optimization is realized.

The invention discloses a nitride ceramic material microwave sintering method. According to the invention, a nitride ceramic blank is placed between graphite plates, and microwave sintering is carried out under a protective atmosphere in a microwave sintering device. A microwave frequency value range is 2.45GHz, a microwave sintering temperature is 500-3000 DEG C, and a temperature maintaining time is 0-50h. The protective atmosphere is composed of nitrogen gas or argon gas or a mixed gas of nitrogen and hydrogen. The pressure is normal pressure. Different from traditional convection, conduction or radiation heating method, according to the invention, heat is produced through the coupling of a special band of microwave and the basic structure of the material. With the medium loss of the material, the material is heated with an integral heating manner. The method has the advantages of low sintering temperature, short temperature maintaining time, low energy consumption, and the like. The sintered material has good performances and considerable economic benefit.

The present invention relates to an aluminum nitride ceramic low-temperature sintering aid system, which comprises a component A and a component B, wherein the component A is at least one selected from TiO2, ZrO2 and HfO2, and the component B is at least one selected from V2O5, Nb2O5 and Ta2O5. Compared to the scheme reported in the current literatures, the sintering aid scheme of the present invention has the following advantages that the densification process of the material can be achieved within the short time, the process is simple and reliable, and the high thermal conductivity can be obtained.

The invention belongs to the technical field of a ceramic base plate, and particularly relates to a preparation process of a ceramic base plate for high-power LED (light emitting diode) heat radiation. The preparation process comprises the following steps of 1, preparing composite sintering auxiliary agents; 2, preparing ceramic slurry; 3, forming ceramics. The preparation process has the following beneficial effects that 1, the heat conduction coefficient of the ceramic base plate is great, the heat-resistant performance is excellent; the bending-resistant intensity is high, and phenomena such as bending and tilting are avoided; 2, a proper sintering method is used, and the proper sintering auxiliary agents are selected, so that the compactness of alumina ceramic sintering bodies is realized, and the heat conductivity of the alumina ceramics is greatly improved; 3, low-melting point phases can be formed by the sintering auxiliary agents, the liquid-phase sintering can be realized, the sintering temperature is lowered, and the blank compactness is promoted; 4, melamine in a recipe can produce aluminum nitride and carbonitride at high temperature, and the hardness and the lustrousness of the surface of the ceramic base plate are improved.

The invention relates to a copper particle with a surface subjected to antioxidant protection, a low-temperature sintered copper paste, and a sintering process using the low-temperature sintered copper paste. According to the copper particle with the surface subjected to antioxidant protection, the surface of the copper particle is modified by an organic solderable protective agent, wherein the organic solderable protective agent contains a certain proportion of diphenyl-p-phenylenediamine. The organic solderable protective agent may be at least one of benzotriazole, imidazole, and benzimidazole.

The invention discloses a preparation method of a graphene coated aluminum powder sintering type electrolytic capacitor anode foil, which comprises the following steps of uniformly mixing spherical aluminum powder, an adhesive and a solvent to form aluminum powder slurry, adding graphene or graphene dispersion liquid into the aluminum powder slurry to obtain mixed slurry, coating an aluminum foil with the mixed slurry to obtain an initial slurry-coated aluminum foil, sintering the initial slurry-coated aluminum foil in inert gas, and acquiring the graphene-coated aluminum powder sintering type porous electrode foil, and performing anodic oxidation treatment on the graphene-coated aluminum powder sintering type porous electrode foil to obtain the graphene-coated aluminum powder sintering type electrolytic capacitor anode foil. The aluminum powder is subjected to graphene coating treatment, graphene serving as a two-dimensional material has the characteristic of ultrahigh specific surface area, contact between the aluminum powder is facilitated by adding the graphene in the sintering process, so that the sintering performance is improved, and the graphene/Al2O3 composite structure has a high dielectric constant.

The invention discloses a method for preparing LaB by spark plasma sintering technology. ₆ -VB ₂ The method for eutectic composite material is characterized in that: first according to the mass percentage of eutectic phase diagram, LaB ₆ Powder and VB ₂ The powder is mixed evenly by high-energy ball milling, then pre-pressed, and finally sintered in a spark plasma sintering furnace to obtain LaB ₆ -VB ₂ Eutectic composites. LaB prepared by spark plasma sintering technology in the present invention ₆ -VB ₂ The eutectic composite material has a high density of 97%.

The invention discloses a hot-pressing mold for small-sized carving saw blades. The hot-pressing die comprises the carving saw blades, a mold frame assembly and a hot-pressing mold assembly used in cooperation with the mold frame assembly; and the hot-pressing mold assembly comprises a baffle plate assembly, separation plate assemblies and center rods, wherein the baffle plate assembly is made ofa high-strength graphite material, and the separation plate assemblies and the center rods are used in cooperation with the baffle plate assembly. According to the hot-pressing mold, the mold frame assembly with the carving saw blades and made of the high-strength graphite material, the hot-pressing mold assemblies and the center rods are assembled together, and are put into a vacuum hot-pressingsintering machine to be subjected hot-pressing sintering so that high-pressure sintering of the stone carving saw blades can be realized, and therefore single sintering time is shortened, the production speed is increased, and the product quality is improved.

A method for synthesis of a binary metal composite oxide by microwave sintering relates to a method for synthesis of the metal oxides, the method is as follows: internal heating of the reaction system is performed by use of the properties that activated carbon mixed in a reactant can absorb microwave, and high temperature solid state reaction can be completed at relatively lower temperature and in shorter time. The method is suitable for the realization of microwave sintering reaction between a non-microwave-absorption metal oxide and a weak-microwave-absorption metal oxide. A proper amount of activated carbon is added into a mixture of the non-microwave-absorption metal oxide and the weak-microwave-absorption metal oxide which are weighed in stoichiometric ratio, the activated carbon, the non-microwave-absorption metal oxide and the weak-microwave-absorption metal oxide are fully mixed, and the mixture is pressed into a cylinder to be burned. The cylinder to be burned is put into a heat insulating support made of magnesium oxide refractory bricks, then sent into a microwave oven for sintering to obtain a sintered product. The sintered product is thermally treated in air and dipped and washed by hot water, and then is dried to obtain the target complex oxide. The method is applicable to all kinds of metal oxides with thermal stability, and is energy-saving, and relatively mild in conditions.