Patent ID: 6777360
Filing Date: 2004-08-17
Classification: C04B,Y02P,Y02W

Abstract:
A ceramic material obtained by a method comprising the steps of:mixing a defatted bran derived from rice bran with at least one thermosetting resin selected from the group consisting of a phenol resin, diaryl phthalate resin, unsaturated polyester resin, epoxy resin, polyimide resin and triazine resin at a mixing ratio of the defatted bran to the thermosetting resin of 50 to 90:50 to 10 by weight to form a mixture; kneading the mixture; subjecting the kneaded mixture to a primary firing in an inert gas at a temperature in the range of 700 to 1000Â° C.; pulverizing the kneaded mixture after the primary firing into carbonized powders; kneading the carbonated powders with ceramic powders, a solvent and a binder to yield a plastic workpiece; pressure-forming the plastic workpiece at a pressure in the range of 10 to 100 MPa to give a formed plastic workpiece; and subjecting the formed plastic workpiece to secondary firing in an inert gas atmosphere or in an atmosphere having no oxygen at a temperature in a range of 100 to 1400Â° C., wherein the ceramic powders are selected from the group consisting of SiO2, Si3N4, ZrO2, Al2O3, SiC, BN, WC, TiC, a Sialon compound, porcelain clay, feldspathic clay and kaolinite, wherein the mixing ratio of the carbonized powders to the ceramic powders is 5 to 95:95 to 5 by weight and the binder is added in an amount of 1 to 50 parts by weight, based on 100 parts by weight of the carbonized powders.