METHOD OF MANUFACTURING MN-ZN FERRITE SINTERED BODY

摘要

PURPOSE: To manufacture a large sized and high density sintered bodies by a method wherein Mn-Zn ferrite raw material mixed particles are filled up and molded in a metallic mold internally lined with rubber while vertically vibrating the metallic mold and after being cold hydrostatically pressurized to be sintered at atmospheric pressure for performing hot hydrostatically pressuring step. ;CONSTITUTION: Mn-Zn ferrite raw material mixed particles comprising the mixed particles of Fe₂O₃, MnO and ZnO are thrown into a metallic mold internally1ined with rubber to be filled up and molded while vertically vibrating the metallic mold. Next, the molded bodies after being cold hydrostatically pressurized are to be sintered at atmospheric pressure for performing hot hydrostatically pressurizing step. Through these procedures, even large sized high density sintered bodies developing the least cracking defect can be made of previously processed material. Resultantly, the larger sized in higher density sintered bodies can be manufactured without decreasing the yield due to the development of cracking defect, etc., when the former sintered bodies are hot hydrostatically pressurized.;COPYRIGHT: (C)1994,JPO&Japio