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Origin of High Q for Microwave Complex Perovskite

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  • Trans Tech Publications Ltd
Origins of high Q are considered on intrinsic as high symmetry, ordering structure and high density crystal structure. It was concluded that the high symmetry brings high Q instead of ordering comparing some cases as follows: As if ordering ratio of Ba(Zn_(1/3)Ta_(2/3))O_3 (BZT) is high of about 80%, Q values are distributed from low to high Q. Disordered BZT ceramics with high density obtained for short sintering time by spark plasma sintering (SPS) showed high Q. Ba(Zn_(1/3)Nb_(2/3))O_3 (BZN) with order-disorder transition showed high Q at disorder form sintered over the transition temperature. And, the disordered BZN with high Q annealed at lower temperature changed to order structure without improvement of Q.

microwave dielectricsquality factorhigh Qorderingorder-disorder transitionhigh symmetrycrystal structurecomplex perovskiteBa(Zn_(1/3)Ta_(2/3))O_3 (BZT)Ba(Zn_(1/3)Nb_(2/3))O_3 (BZN)spark plasma sintering (SPS)

Hitoshi Ohsato、Eiichi Koga、Isao Kagomiya、Ken-ichi Kakimoto

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Material Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Department of Engineering, Panasonic Electronic Devices Hokkaido Co. Ltd., Chitose, Hokkaido 066-8502, Japan

2010

10.4028/www.scientific.net/KEM.421-422.77

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.421/422
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