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Title:
PIEZOELECTRIC COMPOSITION AND PIEZOELECTRIC ELEMENT
Document Type and Number:
WIPO Patent Application WO/2019/181977
Kind Code:
A1
Abstract:
A piezoelectric composition including a composite oxide having a perovskite structure represented by the general formula ABO3, copper, and at least one element selected from the group consisting of chromium, nickel, and zinc, said piezoelectric composition being characterized in that: the A-site element in ABO3 is potassium, and the B-site element is niobium or niobium and tantalum; relative to 1 mol of the composite oxide, the content ratio of the copper is α mol % in terms of CuO, and the content ratio of the at least one element selected from the group consisting of chromium, nickel, and zinc is β mol % in terms of CrO3/2, NiO, and ZnO; α satisfies the relationship 0.2 ≤α ≤2.5; and β satisfies the relationship 0.2 ≤β ≤2.0.

Inventors:
HIROSE, Masakazu (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
HIROSE, Yuiko (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
KATOH, Hiroki (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
SASAKI, Tamotsu (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
UMEDA, Yuji (2-5-1 Nihonbashi, Chuo-k, Tokyo 28, 〒1036128, JP)
Application Number:
JP2019/011577
Publication Date:
September 26, 2019
Filing Date:
March 19, 2019
Export Citation:
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Assignee:
TDK CORPORATION (2-5-1, Nihonbashi Chuo-k, Tokyo 28, 〒1036128, JP)
International Classes:
H01L41/187; C04B35/495; H01L41/083; H01L41/09; H01L41/257; H01L41/33; H01L41/338; H01L41/43; H03H9/17
Domestic Patent References:
WO2006117990A12006-11-09
Foreign References:
JP2006028001A2006-02-02
JP2009120443A2009-06-04
JP2010180121A2010-08-19
JP2014111529A2014-06-19
Attorney, Agent or Firm:
MAEDA & SUZUKI (8F Iwanami Shoten Hitotsubashi Bldg, 5-5 Hitotsubashi 2-chome, Chiyoda-k, Tokyo 03, 〒1010003, JP)
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