Title:
METHOD FOR MANUFACTURING PIEZOELECTRIC CERAMIC, PIEZOELECTRIC CERAMIC, AND PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2014/084265
Kind Code:
A1
Abstract:
A method for manufacturing a piezoelectric ceramic, comprising a step for preparing a raw material to include A, B, Ba, and Zr in the composition ratio represented by the general formula (1 - s)ABO3-sBaZrO3 (where A is at least one species of element selected form alkali metals, B is at least one species of transition metal element including Nb, and 0.06 < s ≤ 0.15), a step for molding the raw material to obtain a molded article, a step for firing the molded article in a reducing atmosphere, and a step for heat treating, in an oxidizing atmosphere, the fired body obtained by the firing step.
Inventors:
YAMANAKA SHUJI (JP)
NAKAJIMA GENEI (JP)
KATO TOMOTSUGU (JP)
TANAKA KENYA (JP)
KARAKI TOMOAKI (JP)
NAKAJIMA GENEI (JP)
KATO TOMOTSUGU (JP)
TANAKA KENYA (JP)
KARAKI TOMOAKI (JP)
Application Number:
PCT/JP2013/081929
Publication Date:
June 05, 2014
Filing Date:
November 27, 2013
Export Citation:
Assignee:
TOYAMA PREFECTURE (JP)
HITACHI METALS LTD (JP)
HITACHI METALS LTD (JP)
International Classes:
C04B35/00; H01L41/187; H01L41/22
Domestic Patent References:
| WO2010050258A1 | 2010-05-06 | |||
| WO2008152851A1 | 2008-12-18 | |||
| WO2006117990A1 | 2006-11-09 | |||
| WO2005021461A1 | 2005-03-10 | |||
| WO2004106264A1 | 2004-12-09 | |||
| WO2012141105A1 | 2012-10-18 |
Foreign References:
| JPH11228227A | 1999-08-24 |
Other References:
FISHER,JOHN G. ET AL.: "Microstructural changes in (K0.5Na0.5)NbO3 ceramics sintered in various atmospheres", JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol. 29, 17 March 2009 (2009-03-17), pages 2581 - 2588
KOBAYASHI,KEISUKE ET AL.: "A Route Forwards to Narrow the Performance Gap between PZT and Lead-Free Piezoelectric Ceramics with Low Oxygen Partial Pressure Processed (Na0.5K0.5) Nb03", JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 95, no. 9, September 2012 (2012-09-01), pages 2928 - 2933
SHIN'ICHIRO KAWADA: "Study of Nickel Inner Electrode Lead-free Piezoelectric Multilayer Ceramics", MATERIALS INTEGRATION, vol. 24, no. 12, 1 December 2011 (2011-12-01), pages 39 - 45
KOBAYASHI,KEISUKE ET AL.: "A Route Forwards to Narrow the Performance Gap between PZT and Lead-Free Piezoelectric Ceramics with Low Oxygen Partial Pressure Processed (Na0.5K0.5) Nb03", JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 95, no. 9, September 2012 (2012-09-01), pages 2928 - 2933
SHIN'ICHIRO KAWADA: "Study of Nickel Inner Electrode Lead-free Piezoelectric Multilayer Ceramics", MATERIALS INTEGRATION, vol. 24, no. 12, 1 December 2011 (2011-12-01), pages 39 - 45
Attorney, Agent or Firm:
OKUDA SEIJI (JP)
Seiji Okuda (JP)
Seiji Okuda (JP)
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