Patent ID: 7445850
Filing Date: 2008-11-04
Classification: H01H

Abstract:
1. A switch container for encapsulating and hermetically sealing switch members therein, comprising a hollow ceramic body, wherein the ceramic body contains 45 to 65% by weight of alumina and 35 to 55% by weight of crystallized glass, wherein the crystallized glass comprises mullite, and wherein the hollow ceramic body has an X-ray diffraction peak intensity of alumina that is higher than that of mullite and an X-ray diffraction peak intensity of mullite that is higher than that of any other substance except alumina, for a diffraction-scanning angle 2θ ranging between 20-60°, wherein the ceramic body is formed from raw materials comprising 50-80% by weight of alumina and 20-50% by weight of clay powder excepting water, the clay powder containing at least one glass-forming material selected from the group consisting of Fe further comprising, a metallizing layer formed on a surface of the hollow ceramic body, wherein the metallizing layer contains 70-94% by weight of at least one of tungsten and molybdenum, 0.5 to 10% by weight of nickel, and 2 to 23% by weight of silica.