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- Van Hong Le
- Duy Tan University Institute of Materials Science, VAST
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- Van Khien Nguyen
- Institute of Materials Science, VAST Thai Nguyen University
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- Van Chuong Truong
- Hue Science University
書誌事項
- タイトル別名
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- Dielectric Relaxation of Ba<sub>1−</sub><i><sub>x</sub></i>Ca<i><sub>x</sub></i>TiO<sub>3</sub> (<i>x</i> = 0.0–0.3)
- Dielectric Relaxation of Ba<sub>1−</sub><i><sub>x</sub></i>Ca<i><sub>x</sub></i>TiO<sub>3</sub> (<i>x</i> = 0.0–0.3)
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Ba1−xCaxTiO3 samples (x = 0.0–0.30) were prepared by a solid state reaction method. X-ray diffraction patterns of the prepared samples show that the samples containing Ca2+ concentration lower than 14 at% were identified to tetragonal phase of BaTiO3. In the samples with Ca2+ concentration higher than 14 at% CaTiO3 appears and coexists with BaTiO3. The dielectric constant at room temperature of all the samples was measured in a frequency range from zero to 2.5 MHz. A modified Cole-Cole formula was used to fit the experimental data. The fitting results show that the samples exhibit a single relaxation process that suggests BaTiO3 and CaTiO3 coexist in a nested hybrid form in the samples with Ca concentration in a range of (0.14–0.30). An abnormal dependence on the Ca2+ concentration of the dielectric relaxation time was observed and supposed to be related with a pinning effect due to the local point-deformation caused by Ca2+ substitution and/or with a nesting of BaTiO3 and CaTiO3 in a hybrid form.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 56 (9), 1374-1377, 2015
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204253140480
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- NII論文ID
- 130005094791
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 026709008
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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