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:
May. 25, 2010
Filed:
Nov. 30, 2007
Hideo Hosono, Yokohama, JP;
Katsuro Hayashi, Yokohama, JP;
Sung Wng Kim, Yokohama, JP;
Masahiro Hirano, Yokohama, JP;
Satoru Narushima, Tokyo, JP;
Setsuro Ito, Tokyo, JP;
Hideo Hosono, Yokohama, JP;
Katsuro Hayashi, Yokohama, JP;
Sung Wng Kim, Yokohama, JP;
Masahiro Hirano, Yokohama, JP;
Satoru Narushima, Tokyo, JP;
Setsuro Ito, Tokyo, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Tokyo Institute of Technology, Tokyo, JP;
Abstract
Provided is a method for preparing an electroconductive mayenite type compound with good properties readily and stably at low cost. A production method of an electroconductive mayenite type compound comprising a step of subjecting a precursor to heat treatment, is a method for preparing an electroconductive mayenite type compound, comprising a step of subjecting a precursor to heat treatment; wherein the precursor is a vitreous or crystalline material, which contains Ca and Al, in which a molar ratio of (CaO:AlO) is from (12.6:6.4) to (11.7:7.3) as calculated as oxides, and in which a total amount of CaO and AlOis at least 50 mol %, and wherein the heat treatment is heat treatment comprising holding the precursor at a heat treatment temperature T of from 600 to 1415° C. and in an inert gas or vacuum atmosphere with an oxygen partial pressure Pin a range of P≦10×exp [{−7.9×l0/(T+273)}+14.4] in the unit of Pa.