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. 15, 2012
Filed:
Mar. 12, 2010
Naomi Teratani, Nagoya, JP;
Toru Hayase, Nagoya, JP;
Yuji Katsuda, Tsushima, JP;
Masahiro Kida, Yatomi, JP;
Naomi Teratani, Nagoya, JP;
Toru Hayase, Nagoya, JP;
Yuji Katsuda, Tsushima, JP;
Masahiro Kida, Yatomi, JP;
NGK Insulatores, Ltd., Nagoya, JP;
Abstract
A method for manufacturing an alumina sintered body of the present invention comprises: (a) forming a mixed powder containing at least AlOand MgFor a mixed powder containing AlO, MgF, and MgO into a compact having a predetermined shape; and (b) performing hot-press sintering of the compact in a vacuum atmosphere or a non-oxidizing atmosphere to form an alumina sintered body, in which when a amount of MgFto 100 parts by weight of AlOis represented by X (parts by weight), and a hot-press sintering temperature is represented by Y (° C.), the hot-press sintering temperature is set to satisfy the following equations (1) to (4)1,120≦≦1,300  (1)0.15≦≦1.89  (2)≦−78.7+1,349  (3)≧−200+1,212  (4).