Lead-free piezo-electric porcelain composition, piezo-electric element using the same, and method for producing lead-free piezo-electric porcelain composition

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United States of America Patent

PATENT NO 9871187
APP PUB NO 20150295162A1
SERIAL NO

14682631

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Abstract

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A lead-free piezo-electric porcelain composition which contains a main phase having voids and which is formed of a first crystal phase composed of an alkali niobate/tantalate-based perovskite oxide having piezo-electric characteristics; and a sub-phase containing a second crystal phase composed of an A2B6O13-based compound (where the element A is a monovalent element and the element B is one or more divalent to hexavalent elements). The sub-phase fills voids present in the main phase.

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Patent Owner(s)

  • NGK SPARK PLUG CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Honda, Yoshiteru Ise, JP 1 0
Kitamura, Kazuaki Ise, JP 8 47
Kozuka, Hisashi Ichinomiya, JP 14 24
Kurahashi, Toshiaki Konan, JP 10 26
Matsuoka, Takayuki Aichi, JP 23 72
Ohbayashi, Kazushige Nagoya, JP 28 227
Okimura, Yasuyuki Inuyama, JP 22 111
Yamada, Hideto Komaki, JP 32 262
Yamazaki, Masato Komaki, JP 47 371

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