Presentation	2004/6/25 Piezoelectric Properties of KNbO_3 Crystal Grown by Vertical Bridgman Method Kenichi KUDO, Kenji KAKIUCHI, Naoyuki ENDO, Noriko BANBA, Keigo HOSHIKAWA, Tatsuo FUKAMI,
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Abstract(in English)	Single crystals of KNbO_3 have been grown by the vertical Bridgman method. As-grown crystals were cut into plates 6×3×0.5 mm^3, and dielectric constants and resonance characteristics were observed as a function of the electric field strength used in the poling treatment. For [001]_ poled crystal, dielectric constant once increased with increasing amount of the poling field and then decreased again with higher fields. For [101]_ poled crystal, both a reduction in dielectric constant and a higher phase angle shift in the resonant region were observed when the electric field exceeded 85 V/mm. Such observations can be consistently interpreted by the fact that 180° and non-180° domain reversals occur around this field. The anisotropy on [001]_ poled piezoelectric properties suggests that the engineered domain structure consists of the two kinds of 90° domains with different orientations of [101]_ and [1^^-01]_.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Potassium niobate / Vertical Bridgman method / Piezoelectric property / Poling treatment
Paper #	EMD2004-27,CPM2004-36,OME2004-38
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Conference Information
Committee	CPM
Conference Date	2004/6/25(1days)
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Paper Information
Registration To	Component Parts and Materials (CPM)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Piezoelectric Properties of KNbO_3 Crystal Grown by Vertical Bridgman Method
Sub Title (in English)
Keyword(1)	Potassium niobate
Keyword(2)	Vertical Bridgman method
Keyword(3)	Piezoelectric property
Keyword(4)	Poling treatment
1st Author's Name	Kenichi KUDO
1st Author's Affiliation	Precision Technology Research Institute of Nagano Prefecture()
2nd Author's Name	Kenji KAKIUCHI
2nd Author's Affiliation	Precision Technology Research Institute of Nagano Prefecture
3rd Author's Name	Naoyuki ENDO
3rd Author's Affiliation	Cimeo Precision Co., Ltd.
4th Author's Name	Noriko BANBA
4th Author's Affiliation	Faculty of Engineering, Shinshu University
5th Author's Name	Keigo HOSHIKAWA
5th Author's Affiliation	Faculty of Education, Shinshu University
6th Author's Name	Tatsuo FUKAMI
6th Author's Affiliation	Faculty of Engineering, Shinshu University
Date	2004/6/25
Paper #	EMD2004-27,CPM2004-36,OME2004-38
Volume (vol)	vol.104
Number (no)	159
Page	pp.pp.-
#Pages	6
Date of Issue