| Diffuse dielectric anomaly of （Na0.5K0.5Bi）0.5TiO3 crystal at high temperature |
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| 引用本文： | 赵明磊,仪修杰,王春雷,王矜奉,张家良. Diffuse dielectric anomaly of （Na0.5K0.5Bi）0.5TiO3 crystal at high temperature[J]. 中国物理, 2006, 15(7): 1611-1614 |
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| 作者姓名： | 赵明磊 仪修杰 王春雷 王矜奉 张家良 |
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| 作者单位： | School of Physics and Microelectronics, Shandong University, Jinan 250100;College of Material Science and Engineering, Liaocheng University,Liaocheng 252059, China;School of Physics and Microelectronics, Shandong University, Jinan 250100;School of Physics and Microelectronics, Shandong University, Jinan 250100;School of Physics and Microelectronics, Shandong University, Jinan 250100 |
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| 基金项目： | Project supported by the National Nature Science Foundation of China (Grant No 50572056). |
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| 摘 要： | This paper investigates the dielectric properties of(Na0.5K0.5Bi)0.5TiO3 crystal at intermediate frequencies (1kHzle f le 1MHz) in the temperature range of 30--560℃. A pronouncedhigh-temperature diffuse dielectric anomaly has been observed. This dielectricanomaly is shown to arise from a Debye-like dielectric dispersion that slows downfollowing an Arrhenius law. The activation energy Er obtained in the fittingprocess is about 0.69eV. It proposes that the dielectric peak measured at lowfrequency above 400℃ is not related to the phase transition but to aspace-charge relaxation.
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| 关 键 词： | 电介质性 Debye舒张 空间充电 晶体 |
| 收稿时间： | 2006-02-23 |
| 修稿时间： | 2006-03-08 |
Diffuse dielectric anomaly of (Na0.5K0.5Bi)0.5TiO3 crystal at high temperature |
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| Zhao Ming-Lei,Yi Xiu-Jie,Wang Chun-Lei,Wang Jin-Feng and Zhang Jia-Liang. Diffuse dielectric anomaly of (Na0.5K0.5Bi)0.5TiO3 crystal at high temperature[J]. Chinese Physics, 2006, 15(7): 1611-1614 |
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| Authors: | Zhao Ming-Lei Yi Xiu-Jie Wang Chun-Lei Wang Jin-Feng Zhang Jia-Liang |
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| Affiliation: | 1.School of Physics and Microelectronics, Shandong University, Jinan 250100, China ;2. College of Material Science and Engineering, Liaocheng University, Liaocheng 252059, China |
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| Abstract: | This paper investigates the dielectric properties of(Na0.5K0.5Bi)0.5TiO3 crystal at intermediate frequencies (1kHzle f le 1MHz) in the temperature range of 30--560℃. A pronouncedhigh-temperature diffuse dielectric anomaly has been observed. This dielectricanomaly is shown to arise from a Debye-like dielectric dispersion that slows downfollowing an Arrhenius law. The activation energy Er obtained in the fittingprocess is about 0.69eV. It proposes that the dielectric peak measured at lowfrequency above 400℃ is not related to the phase transition but to aspace-charge relaxation. |
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| Keywords: | dielectric properties Debye relaxation space-charge |
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