摘要:
The present invention provides a method for producing a porous silica ceramic material, wherein the method includes a step of forming a mixture including silica particles, a binder and a plasticizer, a step of imparting porosity to a green obtained by the forming of the mixture, by extracting the plasticizer from the green, a step of impregnating the green to which the porosity has been imparted with a sintering aid, and a step of firing the green impregnated with the sintering aid.
摘要:
A system, formulation and method for producing ceramic vacuum microspheres utilizing a spray dryer having a top mounted atomizer rotary wheel and a side or bottom mounted dual fluid nozzle, forming microspheres by spraying solution from the top mounted atomizer rotary wheel and simultaneously coating the microspheres by spraying solution from the side or bottom mounted dual fluid nozzle, transferring the microspheres to a secondary heating unit, and drying the microspheres, all under vacuum of between 1 to 5 millibars.
摘要:
A method of producing high purity nanoscale powders in which the purity of powders produced by the method exceeds 99.99%. Fine powders produced are of size preferably less than 1 micron, and more preferably less than 100 nanometers. Methods for producing such powders in high volume, low-cost, and reproducible quality are also outlined. The fine powders are envisioned to be useful in various applications such as biomedical, sensor, electronic, electrical, photonic, thermal, piezo, magnetic, catalytic and electrochemical products.
摘要:
There is provided a method for manufacturing a silicon carbide based honeycomb structure, the method using, as a part of a starting material, a recycled raw material recycled from a recovered material generated in a process for manufacturing the silicon carbide based honeycomb structure and derived from a starting material for a silicon carbide based honeycomb structure; wherein the recycled raw material is pulverized to have an average particle size of 10 to 300 μm. According to the present invention, structure defects such as voids or coarse particles, which have been problems upon manufacturing a silicon carbide based honeycomb structure, are hardly formed, and a silicon carbide based honeycomb structure having excellent strength and uniform heat conductivity can be obtained. In addition, since a once kneaded material is used as a part of a starting material, the time for kneading can be shortened.
摘要:
Systems and methods for treating a fluid with a body are disclosed. Various aspects involve treating a fluid with a porous body. In select embodiments, a body comprises ash particles, and the ash particles used to form the body may be selected based on their providing one or more desired properties for a given treatment. Various bodies provide for the reaction and/or removal of a substance in a fluid, often using a porous body comprised of ash particles. Computer-operable methods for matching a source material to an application are disclosed. Certain aspects feature a porous body comprised of ash particles, the ash particles have a particle size distribution and interparticle connectivity that creates a plurality of pores having a pore size distribution and pore connectivity, and the pore size distribution and pore connectivity are such that a first fluid may substantially penetrate the pores.
摘要:
A silicon nitride sintered body comprising β-sialon expressed by a composition formula of Si6-ZAlZOZN8-Z, wherein z value being the dissolved amount is 0.1 to 1, as a main phase, a grain boundary phase and Fe silicide particles. The grain boundary phase contains RE (Group III elements in the periodic table)-Al—Si—O, and component ratios of Al, Si and RE in terms of Al2O3, SiO2, RE2O3, respectively is 5 to 50 mass % of Al2O3, 5 to 20 mass % of SiO2, and the balanced amount of RE2O3, the grain boundary phase is contained in a range of 20 volume % or less to 100 volume % of the sintered body, and the Fe silicide particles is contained in 0.02 to 3 mass % in terms of Fe to 100 mass % of the sintered body. Its high thermal shock resistance provides suitable applications to members for molten metal, hot working, and digging.
摘要翻译:包含由Si6-ZAlZOZN8-Z的组成式表示的β-赛隆的氮化硅烧结体,其中作为主相的z值为0.1〜1,晶界相和Fe·硅化物粒子。 晶界相包含RE(元素周期表中的III族元素)-Al-Si-O,以Al2O3,SiO2,RE2O3表示的Al,Si和RE的组分比分别为Al2O3的5〜50质量% 5〜20质量%的SiO 2,平均量的RE 2 O 3,晶界相的含量在烧结体的体积的20体积%以下且100体积%以下,硅化铁粒子的含量为0.02〜3 以烧结体的Fe〜100质量%为基准的质量%。 其高耐热冲击性为熔融金属,热加工和挖掘的成员提供了适合的应用。
摘要:
A stacked PTC thermistor 1 comprises a body 4 obtained by alternating lamination of a semiconductor ceramic layer 2 and an internal electrode 3, and a pair of external electrodes 5a, 5b provided at the edge faces 4a, 4b of the body 4 and electrically connected with the internal electrode 3. The semiconductor ceramic layer 2 is composed of a porous sintered compact containing crystal grains of a barium titanate-based compound, and an alkali metal element is preferentially distributed in at least one of the grain boundaries and voids of the sintered compact.
摘要:
The invention provides a method to transform large quantities of fiber glass waste into useful ceramic products by a low-cost manufacturing process. The method consists of reducing the fiber glass waste into a glass powder; mixing the glass powder with additives into a glass-additives mixture; granulating the glass-additives mixture into granulated particles; forming the granulated particles into a green ceramic article; and heating the green ceramic article into the ceramic product. Water and clay can be included in the processing. Only one firing step is needed with a low peak firing temperature of about 700° C. to about 1000° C. The method conserves energy and natural resources compared to clay-based traditional ceramic manufacturing. High-quality impervious ceramic products can be produced by the invention.
摘要:
A non-porous, non-corrosive, impact-resistant ceramic composition; a method of making the ceramic composition; a method of making a ceramic article from the ceramic composition; and a ceramic article made from the ceramic composition are disclosed; wherein the ceramic composition preferably comprises 40.68 percent by volume of water; 0.57 percent by volume of glucose syrup; 4.52 percent by volume of oak sawdust; 0.57 percent by volume of soda ash; 0.57 percent by volume of sodium silicate; 1.69 percent by volume of corundum; 20.34 percent by volume of Alberta; 20.34 percent by volume of Tennessee ball clay; 4.52 percent by volume of kaolinite; 2.26 percent by volume of feldspar; 2.26 percent by volume of borax; and 1.69 percent by volume of kyanite.