Patent ID: 6063328
Filing Date: 2000-05-16
Classification: C04B,F16B,Y10S,Y10T

Abstract:
mm to 0.6 mm, and an end surface of said main body and a longitudinal end surface of said cylindrical body are spaced apart from each other, which process comprises:making said ceramic member by means of a pressure sintering method;making said cylindrical body by sintering a cylindrical shaped body in the state that said projection is inserted in the cylindrical shaped body,applying a stress developed with firing shrinkage of said cylindrical body centripetally to said projection; andconducting the firing in such a manner that said projection has a relative density larger than the cylindrical body, and a difference in inside diameter between said diameter-expanded portion and straight cylindrical portion after firing is 0.05 mm to 0.6 mm.