33results about How to "Improve sintering stability" patented technology

The invention discloses a fuel pellet with a continuous phase structure and a preparation method of the fuel pellet. The preparation method comprises the following steps: S1, spheroidizing UO2 particles; S2, adding additive powder into the spheroidized UO2 particles, and mixing the additive powder and the spheroidized UO2 particles in a rolling manner to uniformly cover the surfaces of the UO2 particles with the additive powder; and S3, performing discharge plasma sintering on the mixed UO2 particles and additive powder to allow the additive powder to form continuous meshed thermal conductancechannels distributed between the UO2 particles, thereby preparing the fuel pellet with the continuous phase structure. In the preparation method disclosed by the invention, the surfaces of the spheroidized UO2 particles are coated with the additive powder at first, and then the discharge plasma sintering is performed, so that the continuous meshed phase structure can be formed in the fuel pelletto reduce the preparation difficulty, and then the thermal conductivity and the comprehensive performance of the fuel pellet are improved, the sintering time is shortened, and the sintering efficiencyis improved.

The invention provides a microwave dielectric ceramic material prepared by a composite oxide and an additive. The composite oxide is represented by the following general formula: MLa4Ti3M'O15, whereinM is Ca, Ba or Mg, and M' is Al, Sb or Bi. Compared with the prior art, the microwave dielectric ceramic material provided by the invention is prepared by the compound oxide represented by a specificgeneral formula and the additive and is a medium-dielectric-constant microwave dielectric ceramic; the microwave dielectric ceramic material satisfies the dielectric constant near 45 and is continuously adjustable, has an extremely high Q*f value and good sintering stability, and also can achieve continuous adjustment of temperature drift to meet various needs. Experimental results show that therelative dielectric constant [epsilon]r of the microwave dielectric ceramic material provided by the invention is 43.2-46.8, the quality factor Q*f value is more than or equal to 46200 GHz, and the sintering is stable; at the same time, the temperature drift adjusting range is from -8 to +13 ppm/DEG C and can be continuously adjustable to meet various needs, and the microwave dielectric ceramic material has excellent application value and market potential.

A method for producing a sinter layer connection between a substrate and a chip resulting in an electric and thermal connection therebetween and in reduced mechanical tensions within the chip. The method produces a sinter layer by applying a multitude of sinter elements of a base material forming the sinter layer in structured manner on a contact area of a main surface of a substrate; placing a chip to be joined to the substrate on the sinter elements; and heating and compressing the sinter elements to produce a structured sinter layer connecting the substrate and chip and extending within the contact area, the surface coverage density of the sinter elements on the substrate in a center region of the contact area being greater than the surface coverage density of the sinter elements in an edge region of the contact area, and at least one through channel, extending laterally as to the substrate's main surface being provided towards the contact area's edge. A large-area sinter element is situated in the contact area's center region, and circular sinter elements is situated in a contact area edge region. The sinter elements may also have notches. Also described is a related device.

The invention discloses a conductive slurry used for a solar energy battery. The conductive slurry is prepared from the following components, by weight: 75-92 parts of silver powder, 5-12 parts of anorganic solvent, 2-3 parts of an organic carrier, 0.5-1 part of alkyl phenol polyoxyethylene ether, and 0.8-5.3 parts of metal microcrystalline glass powder. The particle size D50 of the metal microcrystalline glass powder is 0.3-2 [mu]m. The metal microcrystalline glass powder is prepared from the following components: 10-50 parts of tellurium dioxide, 15-70 parts of bismuth oxide, 2-10 parts ofzinc oxide, 1-15 parts of tungsten oxide, 5-20 parts of lithium oxide, 0.4-2 parts of boric acid, 1-6 parts of molybdenum chloride, 1-4 parts of silicon oxide, and 1-2 parts of barium carbonate. The battery conversion efficiency is effectively improved, the conductive slurry has characteristics of large viscosity and large surface tension at high temperature, the molten glass does not flow easilyduring a slurry sintering process, and the fine line is maintained.

The invention discloses a high-temperature-resistant grinding-resistant diamond grinding block. The high-temperature-resistant grinding-resistant diamond grinding block is prepared from, by weight, 90-100 parts of diamond, 40-50 parts of aluminum isopropoxide, 2-3 parts of tin powder, 1-2 parts of polyvinylpyrrolidone, 20-30 parts of ferric chloride hexahydrate, 17-21 parts of ferric chloride tetrachloride, 10-15 parts of toluene diisocynate, 14-20 parts of polyadipic acid-1,4-butanediol ester diol, 3-4 parts of acetone and 0.4-1 part of 2,6-butylated hydroxytoluene. According to the high-temperature-resistant grinding-resistant diamond grinding block, the colloidal sol-coated ferric oxides, diamond and tin powder are added, and therefore the sintering stability of a finished product can be effectively improved; and the added prepolymers have the very good bonding effect, therefore, the coating stability can be improved, and the high temperature resistance and the grinding resistance of a finished product module can be enhanced.

The invention provides an FHA/beta-TCP/beta-Ca2P2O7 three-phase ceramic preparation method in the field of biomedical material preparation. FHA/beta-TCP/beta-Ca2P2O7 three-phase ceramic is obtained by preparing precursor powder through a chemical precipitation method with calcium acetate monohydrate, monopotassium phosphate and potassium fluoride dehydrate as raw materials and sintering the precursor powder at a high temperature for 2 h. The process is simple, and the obtained three-phase ceramic is uniform in component and has high osteoconduction, biodegradability and mechanical strength, and is an ideal biochemical medical material.

The invention discloses a lithium ion battery material, which is composed of the following raw materials in parts by weight: lithium hydroxide 50-80, ferrous ammonium phosphate 80-100, 2-thiol benzimidazole 1-2, nano-dispersion 30- 40, thiophene 15-20, and dibenzoyl peroxide 0.3-0.4., The nano-silicon dioxide is first doped with phosphorus trichloride and then reacts with triethanolamine to effectively improve the surface activity of the silicon dioxide. The invention uses thiophene as a monomer and the nano-dispersion as a reaction solvent and realizes the effective combination of the nano-silicon dioxide and the polythiophene through polymerization, thereby improving the sintering stability and the electric conductivity of the finished product material.