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:
Nov. 28, 2017
Filed:
Jul. 04, 2012
Masato Yamazaki, Komaki, JP;
Takayuki Matsuoka, Aichi, JP;
Kazuaki Kitamura, Ise, JP;
Hideto Yamada, Komaki, JP;
Toshiaki Kurahashi, Kounan, JP;
Katsuya Yamagiwa, Komaki, JP;
Kazushige Ohbayashi, Nagoya, JP;
Masato Yamazaki, Komaki, JP;
Takayuki Matsuoka, Aichi, JP;
Kazuaki Kitamura, Ise, JP;
Hideto Yamada, Komaki, JP;
Toshiaki Kurahashi, Kounan, JP;
Katsuya Yamagiwa, Komaki, JP;
Kazushige Ohbayashi, Nagoya, JP;
NGK SPARK PLUG CO., LTD., Aichi, JP;
Abstract
A lead-free piezoelectric ceramic composition mainly includes a first crystal phase (KNN phase) and a second crystal phase (NTK phase). In the first crystal phase (KNN phase), a plurality of crystal grains formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics is bound to each other in a deposited state. The second crystal phase (NTK phase) is formed of a compound containing titanium (Ti) and fills spaces between the crystal grains in the first crystal phase.