Structural and Dielectric Characteristics of Calcium Strontium Magnesium Niobate
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概要
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The dielectric and structural characteristics of (Ca1-xSrx)(Mg1/3Nb2/3)O3, ($x = 0--0.5$) solid solutions are investigated by measuring and observing these properties by X-ray diffractometry, transmission electron microscopy, and Raman spectroscopy. The splitting of superlattice reflections shows that the (Ca1-xSrx)(Mg1/3Nb2/3)O3 solid solution has a $1:2$ ordered structure distorted by the antiphase, the in-phase tilting of oxygen octahedra, and the antiparallel shift of cations at $0 \leq x \leq 0.5$. The strontium substitution causes a tolerance factor increase, which leads to higher structure symmetry. This study indicates that ionic polarizability, tolerance factor, cation substitution, and grain size have a significant effect on the microwave dielectric properties of this solid solution.
- 2009-05-25
著者
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Hwang Jenn-shyong
Department Of Physics National Cheng Kung University
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Huang Chi-yuen
Department Of Mineral And Petroleum Engineering National Cheng Kung University
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Lin Yi-Chang
Department of Electronic Engineering, Ching Yun University, Jhongli 32097, Taiwan
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Lin Yi-Chang
Department of Resources Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
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Lee Chun-Te
Department of Resources Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
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Huang Chi-Yuen
Department of Resources Engineering, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
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Hwang Jenn-Shyong
Department of Physics, National Cheng Kung University, No. 1, University Road, Tainan 701, Taiwan
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