PIEZOELECTRIC CERAMIC, METHOD OF MANUFACTURING THE SAME, AND PIEZOELECTRIC CERAMIC SPEAKER USING THE SAME

Title:

PIEZOELECTRIC CERAMIC, METHOD OF MANUFACTURING THE SAME, AND PIEZOELECTRIC CERAMIC SPEAKER USING THE SAME

Document Type and Number:

Japanese Patent JP2015110504

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic of high kr and high specific dielectric constant which can be sintered at low temperature and exhibit minimal characteristics variations.SOLUTION: A piezoelectric ceramic has a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains present sporadically in the primary phase.

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Inventors:

WATANABE TAKEMOTO
GOTO TAKAYUKI
HATANO KEIICHI
KISHIMOTO SUMIAKI
TOSHIDA YUTAKA

Application Number:

JP2014119824A

Publication Date:

June 18, 2015

Filing Date:

June 10, 2014

Export Citation:

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Assignee:

TAIYO YUDEN KK

International Classes:

C04B35/493; H01L41/09; H01L41/187; H01L41/39; H04R17/00; H04R31/00

Domestic Patent References:

JP2006193413A	2006-07-27
JP2014208562A	2014-11-06
JP2007284344A	2007-11-01

Other References:

JPN6015047522; Ｙｏｎｇｋｅ　ＹＡＮ　ｅｔ　ａｌ．: 'Ｉｎｄｅｎｔｉｆｉｃａｔｉｏｎ　ａｎｄ　Ｅｆｆｅｃｔ　ｏｆ　Ｓｅｃｏｎｄａｒｙ　Ｐｈａｓｅ　ｉｎ　ＭｎＯ２-Ｄｏｐｅｄ　０．８Ｐｂ（Ｚｒ０．５２Ｔｉ０．４８）Ｏ３-０．２Ｐｂ（Ｚｎ１／３Ｎｂ２／３）Ｏ' Ｊｏｕｒｎａｌ　ｏｆ　Ａｍｅｒｉｃａｎ　Ｃｅｒａｍｉｃ　ＳｏｃｉｅｔｙＶｏｌ．９４　Ｎｏ．１１, 2011, ｐ．３９５３-３９５９

Attorney, Agent or Firm:

Hiroyuki Kurihara

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