Estimation of Microwave Dielectric Properties of [(Na1/2La1/2)1-x(Li1/2Nd1/2)x]TiO3 Ceramics by Bond Valence
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概要
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Microwave dielectric properties of the [(Na1/2La1/2)1-x(Li1/2Nd1/2)x]TiO3 ($0.0\leq x\leq 0.2$) ceramics related to the bond valence were investigated as a function of (Li1/2Nd1/2)2+ content. A single perovskite phase with the cubic structure was obtained through the entire composition range. With an increase of (Li1/2Nd1/2)2+ content, the dielectric constant ($K$) increased due to the decrease of the average bond strength between cation and oxygen ion estimated from oxygen bond valence ($V_{\text{O}}$). However, $Q\cdot f$ value decreased with an increase of (Li1/2Nd1/2)2+ content due to the changes of composition. Temperature coefficient of resonant frequency ($\mathit{TCF}$) could be controlled from 480 ppm/°C at $x=0.0$ to 7.5 ppm/°C at $x=0.2$ due to the increase of B-site bond valence in ABO3 perovskite structure.
- 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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Kim Eung
Department Of Biological Sciences Konkuk University
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Chun Byung
Department Of Chemical And Biological Engineering Korea University
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Chun Byung
Department of Materials Engineering, Kyonggi University, Suwon 442-760, Korea
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Kim Eung
Department of Materials Engineering, Kyonggi University, Suwon 442-760, Korea
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