Patent ID: 6027389
Filing Date: 2000-02-22
Classification: C04B,H01J

Abstract:
A process for producing a ceramic tube for a metallic halide lamp, comprising:forming an integrally molded body comprised of an electrode member-inserting portion and an annular portion located around an outer periphery of the electrode member-inserting portion;inserting the annular portion of the integrally molded body into an open end portion of a molded cylindrical tubular body in a state that each of the integrally molded body and the molded tubular body is used as molded or after being calcined, thereby forming an assembled body; and,firing the assembled body, thereby forming an integrally fired body comprised of the electrode member-inserting portion and the annular portion, whereas the annular portion and the tubular body are sintered to each other by firing in a state that radial press fitting forces act between the annular portion and the tubular body, said ceramic tube being comprised of the cylindrical tubular body containing a discharging space with open end portions at both ends thereof, the annular portions provided at the open end portions of the tubular body, and electrode member-inserting portions fixed at the opposite ends of the tubular body through the annular portions, respectively.