PURPOSE: To improve the mechanical strength and heat-resisting property of a molded material in such a way that fine particles of a bivalent metal ferrite are dispersed in an inorganic oxide powder.
CONSTITUTION: Fine particles of a bivalent metal ferrite are dispersed in an inorganic oxide powder. The bivalent metal ferrite refers to a ferrite composed of a metal which is selected from barium, manganese, zinc, iron, cobalt, nickel or copper, but preferably a barium ferrite is to be used. A salt of iron and a salt of barium are mixed in such a way that the ratio of Ba/Fe is 1/4W1. Then, while an alkylene glycolate of iron and barium is being heated, one or several kinds of an alkoxide (the number of carbon: 1W4) or a silicate composed of chemical elements which are selected from silicon, aluminum, titanium, zirconium, magnesium, calcium and zinc are added and agitated. In the course of the agitation, a reaction of these compounds is caused and a gel-like sediment is formed. After this sediment has been dried and pulverized, it is heat-treated at 900W1500°C. Through this constitution, it is possible to improve the mechanical strength and heat-resisting property of a molded material.
TACHIKI HIDEYASU
AKIYAMA TADASHI
TANIGAWA EIJI
UDAGAWA YASUO
TAJI KAZUYUKI
UDAGAWA YASUO
| JPS6191907A | 1986-05-10 | |||
| JPS53129899A | 1978-11-13 |