52results about How to "Firing shrinkage is small" patented technology

Provided is a photosensitive conductive paste which is capable of suppressing / preventing the occurrence of delamination between a conductor layer and an insulating layer even in cases where this photosensitive conductive paste is used for the formation of the conductor layer if a multilayer electronic component having a conductor layer and an internal conductor layer is produced by an integral firing process, and which enables fine patterning. This photosensitive conductive paste contains (a) a conductive powder in an amount of from 70.3% by mass to 85.6% by mass (inclusive) of the total mass of the paste, (b) a photosensitive resin composition containing an alkali-soluble polymer, a photosensitive monomer, a photopolymerization initiator and a solvent, and (c) a glass frit, and this photosensitive conductive paste is configured so as to satisfy such requirements that the mass ratio of the glass frit to the conductive paste, namely (glass frit / conductive paste) is from 0.020 to 0.054 (inclusive) and the softening point of the glass frit is not lower than the sintering initiation temperature of the conductive powder. As the glass frit, one having a softening point of 560 DEG C or more is used.

The invention discloses a high-porosity high-permeability Nb2O5 ceramic membrane which is represented by the following general formula: Nb(2-2x-2y)Ta2xTiyO(5-delta), wherein x and y represents mole fractions, 0.1<=x<=0.3, and 0.02<=y<=0.07. Besides, the invention also discloses a preparation method of the high-porosity high-permeability Nb2O5 ceramic membrane. The Nb2O5 ceramic membrane disclosed by the invention simultaneously has high porosity, narrow pore size distribution range, high permeability, high mechanical strength and other performance, and effectively solves the problems that existing ceramic membranes made of aluminum oxide, cordierite, mullite and the like have performance defects, catalyst incompatibility and low catalytic conversion efficiency exist in waste water and waste gas purification treatment and so on, thus bringing major technical breakthrough to the ceramic membrane field, and being beneficial to promote application and development of fine filtration and separation technology in the fields of water treatment, food, medicine, chemical engineering and the like.

The invention relates to an alumina-based ceramic core for directional solidification and a preparation method thereof. The refractory materials used in the alumina-based ceramic core include EC95 fused mullite, zirconium silicate, silica powder, titanium dioxide powder, aluminum pink. The powder contains 65-95% EC95 fused mullite, 5-30% zirconium silicate, 2-8% silicon dioxide powder, 1-5% titanium dioxide powder and 1-10% aluminum powder in percentage by weight. Among them, in EC95 fused mullite, F200 powder accounts for 10-30%, F320 powder accounts for 40-70%, and F600 powder accounts for 10-30%. The preparation method is as follows: ball milling and mixing the above-mentioned powder materials evenly, putting them into molten plasticizer for mixing, and hot-pressing injection molding on a ceramic core molding machine. The hot-press injection molded ceramic core is put into a box-type resistance furnace for firing after trimming and calibration. After being released from the furnace, the ceramic core is strengthened at high temperature and at room temperature with high temperature strengthening agent and room temperature strengthening agent. The alumina-based ceramic core prepared by the invention has the characteristics of high high-temperature strength, good creep resistance, small firing shrinkage, low firing temperature and good metallurgical and chemical properties.

The invention provides a rare earth garnet scintillation crystal and a production method thereof. The rare earth garnet scintillation crystal has the following chemical formula: A 3 sc 2 B 3 o 12 ; Wherein, A is a kind of in rare earth elements such as Y, Cd, Lu, and B is a kind of in Al, Ga or In, and the effective segregation coefficient of A in this rare earth garnet scintillation crystal is 0.3-0.32, and Sc The effective segregation coefficient is 0.33, and the effective segregation coefficient of B is 0.36‑0.4. The molecular formula obtained in the present invention is A 3 sc 2 B 3 o 12 The rare earth garnet scintillation crystal has excellent characteristics such as high density, high effective atomic coefficient, high melting point, high thermal conductivity, high hardness, low thermal expansion coefficient, high transparency, good chemical stability, and high mechanical strength.

The invention discloses a method for reducing firing shrinkage of a strontium ferrite magnetic material, and a product prepared by the method. According to the method, partial ferric oxide powder can be replaced by hydroxy iron powder or reduced iron powder to change the formula composition, such that the firing shrinkage of the ferrite magnetic material is controlled so as to reduce the firing deformation rate of the product. According to the present invention, the deformation amount of the prepared product is small, the post-processing amount is small or the post-processing is not required,the product qualification rate is high, the production cost is reduced, and the method is suitable for the industrial mass production.

The invention discloses a preparation method of a stannic oxide ceramic electrode, belonging to the field of a ceramic technology. The method comprises the steps of: by taking nano antimony-doped stannic oxide powder and CuO powder as sintering aids, blending SnO2 powder with the sintering aids; then, adding a dispersing agent and a bonding agent into the mixture obtained from the former step; and carrying out wet grinding, drying, crushing granulation and isostatic compaction and then firing to prepare the stannic oxide ceramic electrode, wherein the mass percent of the SnO2 powder is 83-91% of the ingredients, the mass percent of the nano antimony-doped stannic oxide powder in the sintering aids is 9-17% of the ingredients, and the mass percent of the CuO powder is 0-0.6% of the ingredients. The preparation method is simple in technology and high in product pass rate, and the obtained stannic oxide ceramic electrode is high in density and low in resistivity at the room temperature and the high temperature.

The invention discloses a zirconia based complex phase ceramic and the manufacture method that belongs to zirconia based structure ceramic field. It contains 2-3mol% Y2O3, 50-65%mol% Y-TZP and 35-50mol% alpha-Al2O3, and sintering assistant agent MgO 0.6-1.0wt% and SiO2 0.6-2.5wt%. The process includes the following steps: mixing zirconia powder that contains Y2O3 with alpha-Al2O3, MgO powder, and SiO2, adding 55-70wt% water, and 1-2wt% ammonium polyacrylate dispersant, taking ball milling, spraying and graining, molding from powder under 150-200MPa, sintering in 1450-1480 degree centigrade to gain the material. The advantages of the invention are that it has simple process, low cost, and has high percent of qualification.

The invention discloses a building ceramics prepared by using industrial solid waste slag dry method and its technology, which comprises 30-60% of solid waste slag, 40-70% of ceramic raw materials and 1-3% of ceramic additives in terms of mass percentage. Wherein, the ceramic raw material is selected from one or more compositions of clay raw materials, feldspar raw materials or talc, and the ceramic additives are sodium tripolyphosphate, sodium silicate, ammonium chloride, ammonium citrate , Sodium humate, Sodium lignosulfonate, Disodium EDTA, EDTA, or a combination of several. The solid waste slag has finer particles after pretreatment. It is mixed with the spray-dried ingredients by dry mixing method and then directly used for brick pressing or put into the silo for standby, which reduces the energy consumption of ball milling and degumming costs, and saves the need for humidification. Granules and fluidized bed drying, and the formula can be quickly adjusted according to the functional characteristics of the product. The process control is simple, and the product has good properties such as thermal insulation and high strength.

The invention provides an environment-friendly, low-shrinkage ceramic and a preparation method thereof. The raw materials of the ceramic body include basic raw materials and silicon carbide, and the silicon carbide is 0.005% to 0.01% of the mass of the basic raw materials. The present invention reduces the firing shrinkage of the green body without affecting the strength of the green body by adding a small amount of silicon carbide foaming agent.