The present invention provides an annealing separator composition, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet.

An annealing separator composition for a grain-oriented electrical steel sheet according to an embodiment of present invention comprising: on the basis of total solid 100 wt %, 5 to 70 wt % of mullite; and the remainder being magnesium oxide or magnesium hydroxide.

A method for fabricating a filter member includes: mixing a predetermined amount of zeolite with alumina to form a composite mixture; spraying a coating material onto the composite mixture to form a coated composite mixture including granules; filtering the granules to obtain granules having a predetermined length dimension; shaping the obtained granules to form a compacted disc having a predetermined thickness; and heat-treating the compacted disc to form a filter member.

Disclosed are ceramic bodies comprised of composite cordierite aluminum magnesium titanate ceramic compositions and methods for the manufacture of same.

A high-temperature resistant lightweight thermal insulation material having a dual-pore structure and a preparation method thereof, wherein the material is prepared by adding a molding promoter and a pore former into raw materials including alumina, silica and aluminosilicate powders, stirring the resulting mixture evenly and extrusion molding the same, followed by sintering, whereby the high-temperature resistant lightweight thermal insulation material having a dual-pore structure comprising macroscopic through-pores and micro-pores is obtained, and wherein the ratio of the total volume of the through-pores to the total volume of the micro-pores is 0.5 to 25:1.

A silicon carbide porous body includes: (A) silicon carbide particles as an aggregate; and (B) at least one selected from the group consisting of metallic silicon, alumina, silica, mullite and cordierite. The silicon carbide porous body has amorphous and/or crystalline SiO.sub.2 or SiO on a surface(s) of the component (A) and/or the component (B). The silicon carbide porous body contains 6% by mass or less of -cristobalite in the amorphous and/or crystalline SiO.sub.2 or SiO.

A coating material for a silicon carbide-based honeycomb structure, the coating material including from 20 to 75% by mass of ceramic powder (A), the ceramic powder (A) including from 55 to 95% by mass of silicon carbide and from 5 to 30% by mass of silicon dioxide as chemical components.

A method of fabricating a part out of composite material, includes forming a fiber texture from refractory fibers; impregnating the fiber texture for a first time with a first slip containing first refractory particles; eliminating the liquid phase from the first slip so as to leave within the texture only the first refractory particles; impregnating the fiber texture for a second time with a second slip containing second refractory particles; eliminating the liquid phase from the second slip so as to leave within the texture only the second refractory particles and obtain a fiber preform filled with the first and second refractory particles; and sintering the first and second refractory particles present in the fiber preform in order to form a refractory matrix in the preform.

A refractory kiln car formed using a refractory composition has excellent resistance to high-temperature thermal shock and creep. The refractory composition is based primarily on chamotte having controlled particle sizes, and may also include mullite, fused silica, calcined alumina and microsilica, having controlled particle sizes. The refractory composition includes an aqueous colloidal silica binder that provides excellent castability and binding between the ingredients following drying.

A plurality of particles of abrasive particles, wherein at least 1% of the abrasive particles of the plurality of abrasive particles can have a first shape, wherein the first shape includes a body including a first surface having a rounded contour, a second surface joined to the first surface at a first edge, the second surface having a less rounded contour than the first surface, and a third surface joined to the first surface at a second edge, the third surface having a less rounded contour than the first surface. The plurality of particles can further comprise an average particle size of at least 300 microns and not greater than 900 microns, a specific surface area of at least 0.04 m.sup.2/g and not greater than 0.10 m.sup.2/g, and an alumina content of at least 65 wt % based on a total weight of the plurality of particles.

The glaze is prepared from the following raw materials in percentage by weight: Fire Clay 10%-25%, Feldspar 30%-40%, Sand 30%-40%, Calcium Silicate 8%-12%, Graphane (i.e., disordered crystalline and hydrogenated double bounded Carbon) 5%-15% or C-doped Boron Nitride (CBN) 5%-15%, various metal oxides as pigments and water. This glaze is applied on the standard glazing operation in the ceramic insulator manufacturing process and is fired in a controlled inert-gas atmosphere.