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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.:

US 9231189 B1

PDFFull Text
Date of Patent:
Jan. 05, 2016

Filed:

Apr. 03, 2013

Sodium niobate powder, method for producing the same, method for producing ceramic, and piezoelectric element

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Tomoaki Masubuchi, Yokosuka, JP;

Toshiaki Aiba, Fujisawa, JP;

Toshihiro Ifuku, Yokohama, JP;

Makoto Kubota, Yokohama, JP;

Takayuki Watanabe, Yokohama, JP;

Tatsuo Furuta, Machida, JP;

Jumpei Hayashi, Yokohama, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Canon USA Inc. IP Division

Primary Examiner:

Erica Lin

Int. Cl.
CPC ...
H01L 41/187 (2006.01); B32B 18/00 (2006.01); C01G 33/00 (2006.01); C04B 35/495 (2006.01); H01G 4/12 (2006.01); B41J 2/14 (2006.01); C04B 35/64 (2006.01); G02B 27/00 (2006.01); H01L 41/047 (2006.01); H01L 41/083 (2006.01); H02N 2/12 (2006.01); H02N 2/10 (2006.01);
U.S. Cl.
CPC ...
H01L 41/1873 (2013.01); B32B 18/00 (2013.01); B41J 2/14274 (2013.01); C01G 33/00 (2013.01); C04B 35/495 (2013.01); C04B 35/64 (2013.01); G02B 27/0006 (2013.01); H01G 4/1254 (2013.01); H01L 41/0477 (2013.01); H01L 41/083 (2013.01); H02N 2/103 (2013.01); H02N 2/12 (2013.01); C01P 2004/38 (2013.01); C01P 2004/62 (2013.01); C01P 2006/82 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3236 (2013.01); C04B 2235/3255 (2013.01); C04B 2235/52 (2013.01); C04B 2235/5292 (2013.01); C04B 2235/5296 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/768 (2013.01); C04B 2235/787 (2013.01); C04B 2237/34 (2013.01); C04B 2237/405 (2013.01); C04B 2237/407 (2013.01); H02N 2/106 (2013.01);
Abstract

A sodium niobate powder includes sodium niobate particles having a shape of a cuboid and having a side average length of 0.1 μm or more and 100 μm or less, wherein at least one face of each of the sodium niobate particles is a (100) plane in the pseudocubic notation and a moisture content of the sodium niobate powder is 0.15 mass % or less. A method for producing a ceramic using the sodium niobate powder is provided. A method for producing a sodium niobate powder includes a step of holding an aqueous alkali dispersion liquid containing a niobium component and a sodium component at a pressure exceeding 0.1 MPa, a step of isolating a solid matter from the aqueous dispersion liquid after the holding, and a step of heat treating the solid matter at 500° C. to 700° C.

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