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:
Jul. 06, 2010
Filed:
Feb. 21, 2008
Takero Fukudome, Kagoshima, JP;
Shuichi Tateno, Kagoshima, JP;
Hiroshi Yoshimitsu, Kagoshima, JP;
Takashi Watanabe, Kagoshima, JP;
Tatsuyuki Nakaoka, Kagoshima, JP;
Takero Fukudome, Kagoshima, JP;
Shuichi Tateno, Kagoshima, JP;
Hiroshi Yoshimitsu, Kagoshima, JP;
Takashi Watanabe, Kagoshima, JP;
Tatsuyuki Nakaoka, Kagoshima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A sintered product of silicon nitride includes a crystal phase mainly having silicon nitride crystal grains and an amorphous grain-boundary phase located on the grain boundaries of the silicon nitride crystal grains. The grain-boundary phase contains lanthanum, aluminum, magnesium, silicon, and oxygen. The sintered product described above contains 0.1% by mass or more of lanthanum on an oxide basis, 0.05 to 0.6% by mass of aluminum on an oxide basis, 0.3% by mass or more of magnesium on an oxide basis, and 2.5% by mass or less of oxygen. The total amount of lanthanum on an oxide basis, aluminum on an oxide basis, and magnesium on an oxide basis is 3.5% by mass or less.