The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 1993
Filed:
Jan. 27, 1992
Keiji Matsuhiro, Nagoya, JP;
Tsuneaki Ohashi, Ohgaki, JP;
NGK Insulators, Ltd., , JP;
Abstract
A heat resistive phosphate-zircon composite body including a main crystalline phase and a secondary crystalline phase, the main crystalline phase being a solid-solved phase of R.sub.y Zr.sub.4 Si.sub.x P.sub.6-x O.sub.24 in which 0<x<2, 2/3<y<2, and R includes of one or more kinds of bivalent or trivalent cations (provided that x and y satisfy electrical neutrality), and the secondary crystalline phase being zircon. A process for producing a heat resistive phosphate-zircon composite body is also disclosed. The process includes the steps of measuring and mixing given amounts of ZrP.sub.2 O.sub.7, (ZrO).sub.2 P.sub.2 O.sub.7, RO and/or a phosphate of R, SiO.sub.2 and a zircon powder, shaping the mixture and firing the shaped body, wherein the given amounts of ZrP.sub.2 O.sub.7, (ZrO).sub.2 P.sub.2 O.sub.7, RO and/or the phosphate of R, and SiO.sub.2 are measured such that the composite body may include a main crystalline phase composed of a solid-solved phase of R.sub.y Zr.sub.4 Si.sub.x P.sub.6-x O.sub.24 and a secondary crystalline phase of zircon.