| Study on the Microstructure and Dielectric Properties of Barium Strontium Titanate Thin Films Prepared by Sol-gel Method |
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| 作者姓名： | SHAN Lian-wei ZHANG Xian-you DONG Li-min WU Ze HAN Zhi-dong FU Xing-hua HOU Wen-ping |
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| 作者单位： | [1]Department of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China [2]Department of Materials Science and Engineering, Jinan University, Jinan 250022, China |
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| 摘 要： | Sr05Ba0.5-xBixTiO3 （BST） thin films were fabricated on a Pt/SiO2/Si substrate by the sol-gel method. Then follows an investigation of the influeoces of bismuth （Bi） on the microstructures and the dielectric properties of Sr0.5Ba0.5-xBixTiO3 （BST） thin films. The microstructures of the BST thin films were examined by the XRD and the TEM techniques. Tetragonal perovskite crystal grains were observed in BST thin films. Increasing Bi^3＋ doping ration in BST will lead to decrease of the grain size. It is found that Bi^3＋ doping decreases the dielectric loss and improves the frequency dispersion of the BST thin films. Not only is compressed the peak of temperature-dependence of dielectric constant of Bi^3＋-doped BST thin films but also moves into the low-temperature region. Moreover, the average Curie tem- perature decreases gradually with the Bi^3＋ contents increasing.
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| 关 键 词： | BST 钛酸钡锶薄膜 溶胶-凝胶法 制备 显微结构 介电性能 钛酸盐 |
| 收稿时间： | 2006-08-10 |
| 修稿时间： | 2006-11-06 |
Study on the Microstructure and Dielectric Properties of Barium Strontium Titanate Thin Films Prepared by Sol-gel Method |
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| SHAN Lian-wei ZHANG Xian-you DONG Li-min WU Ze HAN Zhi-dong FU Xing-hua HOU Wen-ping.Study on the Microstructure and Dielectric Properties of Barium Strontium Titanate Thin Films Prepared by Sol-gel Method[J].Chinese Journal of Aeronautics,2006,19(B12):167-172. |
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| Abstract: | |
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| Keywords: | BST thin films Bi doping characteristic microstructure |
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