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

The invention discloses a magnesium oxide whisker in-situ synthesis magnesium aluminate spinel enhanced magnesium-oxide-based foam ceramic filter with chemical stability and excellent thermal shock resistance capable of sintering in a low temperature and a preparation method thereof. The preparation method comprises the following steps: (1) according to a mass percent, compounding by 15%-25% of nano-aluminum sol, 0.8%-1.5% of rheological agent, and the balance of magnesia ceramics powder containing magnesium oxide whisker, adding deionized water, ball-milling, uniformly mixing, and preparing ceramic slurry of which the solid content is 60%-70% through vacuum exhaust; (2) immerging a polyurethane foamed plastic template in the ceramic slurry, extruding the polyurethane foamed plastic template through a roller press so as to remove redundant immerging slurry, preparing a biscuit, heating the biscuit to 80-120 DEG C, and drying; and (3) placing the dried biscuit in a sintering furnace, warming to 1400-1600 DEG C, and sintering in a high temperature, cooling to room temperature along with the furnace, to obtain the magnesium-oxide-based foam ceramic filter.

A dielectric ceramic composition includes a component represented by composition formula {α(xBaO.yNd2O3.zTiO2)+β(2MgO.SO2)} as a main component and zinc oxide, boron oxide, and a glass having a softening point equal to or lower than a certain temperature as minor components with respect to the main component. In the dielectric ceramic composition, x, y, and z that respectively represent molar ratios of BaO, Nd2O3, and TiO2 are in certain ranges and α and β that represent volume ratios of subcomponents (xBaO.yNd2O3.zTiO2 and 2MgO.SiO2) in the main component are in certain ranges. When the minor components are respectively represented by aZnO, bB2O3, and cglass, a, b, and c that represent mass ratios of the respective minor components to the main component are in certain ranges.

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.

The invention discloses a daily-use ceramic product with good thermal insulation performance and a preparation method thereof. The daily-use ceramic product with good thermal insulation performance is made from the following raw materials by weight: 20-26 parts of albite, anorthite 15-19 parts, 30-40 parts of calcite, 25-32 parts of attapulgite, 10-14 parts of sodium bentonite, 5-7 parts of monetite, 10-14 parts of quartz, 8-8 parts of aluminum silicate fiber tube 11 parts, 4-5.5 parts of sodium silicate, 2.2-3 parts of foaming agent, 0.9-1.3 parts of foam stabilizer, and 0.8-1.1 parts of water reducing agent. The daily-use ceramic product with good thermal insulation performance of the invention has low thermal conductivity and good thermal insulation performance; small thermal expansion coefficient, small thermal expansion, good high temperature resistance; , the overall performance is good.

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.