| 摘要 |
PURPOSE:To obtain sintered fine particles useful as filters, having uniform particle diameters, improved durability and reliability, by blending ceramic powder with a sintering auxiliary and a molding auxiliary, granulating and then sintering in a granular state as it is. CONSTITUTION:Ceramic powder having <=10mu average particle diameter is blended with a sintering auxiliary and a molding auxiliary, granulated and sintered in a granular state as it is to give the aimed sintered fine particles. Silicon carbide, alumina, silicon nitride, zirconia, sialon, etc., may be cited as the ceramics used. The reason why the average particle diameter should be <=10mu is that the sintered fine particles must have dense texture and high strength. Usually C, B, Al, etc., may be cited as the sintering auxiliary in the case of silicon carbide, MgO, etc., in the case of alumina, alumina or yttria in the case of silicon nitride, generally also yttria in the case of sialon and nothing is added in the case of zirconia. |
