Structural Variation and Microwave Dielectric Properties of ZrO2 Added Ba(Zn1/3Ta2/3)O3 Ceramics
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概要
- 論文の詳細を見る
Ba(Zn1/3Ta2/3)O3 (BZT) ceramic has $1:2$ ordered hexagonal structure, but was destroyed with the addition of ZrO2. The $1:1$ ordered cubic structure was developed when a large amount of ZrO2 was added. BZT has a porous and inhomogeneous microstructure with a Ba5Ta4O15 second phase. When ZrO2 was added, a new Ba0.5TaO3 second phase formed and grain growth occurred. Presence of liquid phase which is related to the Ba0.5TaO3 second phase could be responsible for the grain growth. $Q$ value of BZT was greatly enhanced with the addition of ZrO2. The improvement of $Q$ value can be explained by the increase of relative density and grain size. Especially, grain size is considered to be one of the crucial factors for the improvement of $Q$ value of BZT ceramic.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-01-15
著者
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Lee Hwack-joo
New Materials Evaluation Center Korea Research Institute Of Standards And Science
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Park Hyun-min
New Materials Evaluation Center Korea Research Institute Of Standards And Science
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Yoon Seok-jin
Thin Film Material Research Center Korea Institute Of Science And Technology
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Yang Jung-in
Department Of Materials Science And Engineering Korea University
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Nahm Sahn
Department Of Materials Science And Engineering Korea University
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Park Hyun-Min
New Materials Evaluation Center, Korea Research Institute of Standards and Science, Daeduk Science Town, Taejon 305-600 Korea
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Lee Hwack-Joo
New Materials Evaluation Center, Korea Research Institute of Standards and Science, Daeduk Science Town, Taejon 305-600 Korea
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Yang Jung-In
Department of Materials Science and Engineering, Korea University, 1-5 Ka, Anam-Dong, Sungbuk-Ku, Seoul 136-701, Korea
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