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51results about How to "Good low temperature sintering performance" patented technology

Preparation and application of high-potential gradient zinc oxide piezoresistor material

This invention relates to the preparation and application of a high potential gradient ZnO piezoresistive material including: mixing raw materials in the mol ratio of ZnO: Bi2O3:Sb2O3:Cr2O3:Co2O3:MnO2=96.5:0.7:1.0:0.5:0.8:0.5 to get the product by first and second time powerful fine grindings, low temperature sinter, which is taken as the raw material to be pressed to formation, sintered at low temperature, coated with electrode Ag pulp and welded with electrode lead to get the product of high potential gradient ZnO piezoresistors. This invention greatly refines the metal oxide mixed powder grain size by twice-powerful grindings, the sintered temperature is only 900deg.C and the grain is 1.5-3.5mum.
Owner:EAST CHINA NORMAL UNIVERSITY

Magnesium aluminate spinel enhanced magnesia-based foamed ceramic filter and preparation method thereof

The invention discloses a magnesium aluminate spinel enhanced magnesia-based foamed ceramic filter with capability of realizing sintering at low temperature, excellent chemical stability and excellentthermal shock resistant performance, and a preparation method thereof. The preparation method comprises the following steps that (1) 10 to 20 percent of nanometer alumina sol, 0.8 to 1.5 percent of rheological agents and the balance of magnesium oxide ceramic powder containing a nanometer aluminum oxide sintering aid are proportioned; deionized water is added; ball milling and uniform mixing areperformed; then, through vacuum exhaust, ceramic slurry with the solid content being 60 to 70 percent is prepared; (2) a polyurethane foamed plastic template is soaked into the ceramic slurry; the polyurethane foamed plastic template is extruded through a roller press for removing the redundant leaching hanging slurry; then, biscuit is prepared; then, the biscuit is heated to 80 to 120 DEG C for drying; (3) the dried biscuit is put into a sintering furnace; the temperature is raised to 1400 to 1600 DEG C; high-temperature sintering is performed; cooling is performed along with the furnace to room temperature; the magnesia-based foamed ceramic filter is obtained.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Basic magnesium sulfate whisker in-situ synthesized magnesium-aluminum spinel reinforced magnesium oxide based foamed ceramic filter and preparation method thereof

The invention discloses a basic magnesium sulfate whisker in-situ synthesized magnesium-aluminum spinel reinforced magnesium oxide based foamed ceramic filter that can realize sintering at lower temperature and has excellent chemical stability and thermal shock resistance and a preparation method thereof. The preparation method comprises the steps of: (1) by mass percentage, blending 15%-25% of nano-aluminum sol, 0.8%-1.5% of a rheological agent, and the balance magnesium oxide ceramic powder containing basic magnesium sulfate whisker, adding anhydrous ethanol, performing ball-milling and uniform mixing to obtain a ceramic slurry with a solid content of 60%-70%; (2) immersing a polyurethane foam plastic template into the ceramic slurry, extruding the polyurethane foam plastic template by aroller press to remove redundant hung slurry for making a green body, then removing an ethanol solvent in a 40DEG C-50DEG C ventilation room, and drying the green body; and (3) putting the dried green body into a sintering furnace, performing heating to 1350DEG C-1550DEG C for high temperature sintering, and conducting furnace cooling to room temperature, thus obtaining the magnesium oxide basedfoamed ceramic filter.
Owner:FENGYANG L S NET FORMING CO LTD +1

Low-sintering microwave dielectric ceramic material and preparation method thereof

ActiveCN111320473AGood low temperature sinterabilityGood low temperature sintering performanceLow-k dielectricMicrowave
The invention belongs to the technical field of microwave dielectric materials, and particularly relates to a BaZrO3 system low-temperature sintering low-dielectric-constant C0G microwave dielectric material and a preparation method thereof. The invention relates to the low-sintering microwave dielectric ceramic material, the material is prepared by doping a modifying additive and a sintering aidwith selected components and proportions, the dielectric constant of the obtained microwave dielectric ceramic material can reach 12-16, the Q*f value is 30000-50000, especially the sintering temperature of the material can reach 950 DEG C or below, TCC of the microwave dielectric ceramic material meets the C0G specification, and the microwave dielectric ceramic material has good low-temperature sintering performance and can be used for manufacturing microwave devices such as MLCC and microwave antennas.
Owner:SHANDONG SINOCERA FUNCTIONAL MATERIAL CO LTD

Silver fine particles, production process therefor, conductive paste, conductive membrane and electronic device, containing said silver fine particles

The present invention pertains to: silver fine particles with excellent low-temperature sinterability; a production process therefor; and a conductive paste, a conductive membrane and an electronic device, containing the silver fine particles. In a process for producing silver fine particles which comprises preparing an alcoholic solution (A) of a silver nitrate-amine complex prepared using silver nitrate and at least one water-soluble C2-4 aliphatic amine, preparing, separately from the solution (A), an aqueous solution (B) in which either ascorbic acid or erythorbic acid and a halide are dissolved, adding a mixture of the solution (A) with the solution (B) into a vessel in which water has been put, stirring the resulting mixture, and then subjecting the thus obtained silver fine particles to washing and drying, at least 1.6*10<-3> mol of a halide per mol of silver nitrate is added to the solution (B), whereby an aggregate silver fine particle slurry can be obtained to facilitate the subsequent washing. Thus, silver fine particles which have a carbon content of 0.25wt% or less and thus exhibit excellent low-temperature sinterability can be obtained.
Owner:TODA IND

Zirconium dioxide short fiber and basic magnesium sulfate whisker composite enhanced magnesia-based crucible and preparation method thereof

The invention discloses a preparation method of a zirconium dioxide short fiber and basic magnesium sulfate whisker composite enhanced magnesia-based crucible which can be sintered at the low temperature and has excellent chemical stability and thermal shock resistance. The method comprises steps as follows: (1) 15%-25% of nano aluminum sol, 0.8%-1.5% of a rheological agent and the balance of fused magnesia ceramic powder containing nano lanthanum oxide, zirconium dioxide short fiber and basic magnesium sulfate whisker are prepared in percentage by mass, deionized water is added, the mixture is subjected to ball milling and mixed uniformly, then, vacuum exhausting is performed, and ceramic slurry with the solid content of 70%-80% is prepared; (2) a crucible biscuit is prepared; (3) the dried biscuit is put in a sintering furnace to be sintered at the high temperature and then cooled with the furnace, and a magnesia-based crucible blank is obtained; (4) the magnesia-based crucible blankis subjected to vacuum impregnation treatment in aluminum sol, then, surface polishing treatment is performed, high-temperature secondary sintering is performed after drying, a product is cooled withthe furnace to the room temperature, and the magnesia-based crucible is obtained.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

LED plant growth warm white fluorescent powder and preparation method thereof

The invention discloses a LED plant growth warm white fluorescent powder and a preparation method thereof. The chemical formula of the fluorescent powder is RM<x>Y<y> (WO<4>)<3y / 2> (PO<4>)< (1 + 2X) / 3>: aEu<3+>, bMn<4+>, wherein R is one of Li, Rb, Cs or In, M is one of Ca, Sr, Ba or Mg, 0.1 < = x < = 0.75, 0.2 < = y < = 0.55, and 0.1 < = a < 0.8, 0.3<=b<2. The method comprises steps: grinding ina mortar, mixing R2CO3 and M3(PO3)2, dropwise adding a mixed solution of R2CO3 and M3(PO3)2, adding RMnO4, stirring, taking an obtained precipitate for hydrothermal reaction, and mixing with Eu2O3 toobtain a precursor powder; carrying out high-temperature firing in a reducing atmosphere, adopting an alkaline-earth metal and Y co-doped mixed tungsten phosphate system as a matrix material, codopingEu < 3 + > and Mn < 4 + > to serve as activated light-emitting particles, transferring excitation energy from R3 to sensitized Mn < 4 + >, carrying out gradient temperature control firing treatment after a precursor is prepared through a hydrothermal synthesis method, so that activity and light-emitting efficiency are improved, and concentration quenching effect is overcome. The problems of insufficient stability and deliquescence pollution are avoided, and the requirements of red fluorescent powder for growth of warm white LED plants are met.
Owner:DONGTAI TIANYUAN FLUORESCENT MATERIALS CO LTD

Semi-light Guimo brick for ferrosilicon ladle and preparation method thereof

InactiveCN107698247ALow thermal conductivityFacilitate the conversion processBrickFerrosilicon
The invention belongs to the technical field of refractory materials, and particularly relates to a semi-light Guimo brick for a ferrosilicon ladle and a preparation method thereof, and mainly solvesthe technical problems that the conventional high-aluminum brick for the ferrosilicon ladle has a relatively high heat conductivity coefficient and poor insulation performance. The semi-light Guimo brick for the ferrosilicon ladle is characterized by being prepared from the following raw materials in parts by weight: 60-80 parts of high-aluminum bauxite clinker, 2-5 parts of a raw high-aluminum bauxite material, 3-8 parts of fine andalusite powder, 4-7 parts of fine silicon carbide powder, 2-6 parts of Suzhou soil, 3-10 parts of hollow aluminum oxide spheres, 1-3 parts of silica micropowder and 3.5-6 parts of silica sol. The preparation method of the semi-light Guimo brick for the ferrosilicon ladle comprises the following steps: 1), grinding and crushing; 2), performing mixed grinding onthe raw materials; 3), moulding and preparing a blank; 4), drying; 5), firing at high temperature; 6), cooling to obtain a finished product. The semi-light Guimo brick for the ferrosilicon ladle has the advantages of low cost, excellent heat shock-resisting stability, a low heat conductivity coefficient, high heat efficiency and the like.
Owner:孝义市和中兴矿产有限公司

Fine silver particle dispersion, fine silver particles, and method for producing same

Provided are a fine silver particle dispersion which exhibits low temperature sinterability and in which fine silver particles are uniformly dispersed in a variety of solvents (and especially highly polar solvents); fine silver particles that exhibit low temperature sinterability and excellent dispersibility in a variety of solvents (and especially highly polar solvents); a dispersion obtained using the fine silver particles; and a method for producing same. The fine silver particle dispersion is characterized by containing fine silver particles, a short chain amine having 5 or fewer carbon atoms, and a highly polar solvent and in that the partition coefficient (logP) of the short chain amine is -1.0 to 1.4.
Owner:BANDO CHEM IND LTD

A kind of basic magnesium sulfate whisker in-situ synthesis magnesium aluminum spinel reinforced magnesium oxide based ceramic foam filter and preparation method thereof

The invention discloses a basic magnesium sulfate whisker in-situ synthesized magnesium-aluminum spinel reinforced magnesium oxide based foamed ceramic filter that can realize sintering at lower temperature and has excellent chemical stability and thermal shock resistance and a preparation method thereof. The preparation method comprises the steps of: (1) by mass percentage, blending 15%-25% of nano-aluminum sol, 0.8%-1.5% of a rheological agent, and the balance magnesium oxide ceramic powder containing basic magnesium sulfate whisker, adding anhydrous ethanol, performing ball-milling and uniform mixing to obtain a ceramic slurry with a solid content of 60%-70%; (2) immersing a polyurethane foam plastic template into the ceramic slurry, extruding the polyurethane foam plastic template by aroller press to remove redundant hung slurry for making a green body, then removing an ethanol solvent in a 40DEG C-50DEG C ventilation room, and drying the green body; and (3) putting the dried green body into a sintering furnace, performing heating to 1350DEG C-1550DEG C for high temperature sintering, and conducting furnace cooling to room temperature, thus obtaining the magnesium oxide basedfoamed ceramic filter.
Owner:FENGYANG L S NET FORMING CO LTD +1
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