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. 17, 2011
Filed:
Jan. 26, 2006
Hiroyuki Minamikawa, Machida, JP;
Hiroyuki Minamikawa, Machida, JP;
Kabushiki Kaisha Ohara, Sagamihara-shi, JP;
Abstract
There are provided glass-ceramics comprising, in mass %, 50-60% SiO, 22-26% AlOand 3-5% LiO, having an average crystal grain diameter exceeding 100 nm, and having an average linear thermal expansion coefficient of 30×10/° C. or below within a temperature range of 0° C. to 50° C. These glass-ceramics are manufactured by a step of melting glass raw materials, a step of forming the molten glass, a step of annealing the formed glass, a first heat treating step for heat treating the annealed glass at a temperature of 650-750° C. for 0.1 hour to 200 hours, and a second heat treating step for heat treating the glass at a temperature of 800-1000° C. for 0.1 hour to 50 hours.