| Ca0.075Sr0.925Bi4Ti4O15铁电陶瓷的性能 |
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| 引用本文： | 张丰庆,范素华,陈杨,董蓬超,王营营,田清波.Ca0.075Sr0.925Bi4Ti4O15铁电陶瓷的性能[J].稀有金属材料与工程,2011(Z1):425-427. |
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| 作者姓名： | 张丰庆 范素华 陈杨 董蓬超 王营营 田清波 |
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| 作者单位： | 山东建筑大学 |
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| 基金项目： | 国家自然科学基金(50872075) |
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| 摘 要： | 用溶胶凝胶法制备了Ca0.075Sr0.925Bi4Ti4O15(简称CSBTi)铁电陶瓷样品,研究了烧结温度对CSBTi铁电陶瓷性能的影响。结果表明:1180℃温度下烧结的CSBTi铁电陶瓷样品的铁电性能得到明显改善,剩余极化强度2Pr为19.4μC/cm2,矫顽场强度Ec为72.5kV/cm;压电常数为d33=9.8pC/N;居里温度TC=543℃,随着测试频率的增加,室温下相对介电常数εr的峰值逐渐下降,而对应的居里温度TC则随之上升,表现出弛豫铁电体的特征。
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| 关 键 词： | 铁电陶瓷 居里温度 铁电体 |
Properties of the Ca0.075Sr0.925Bi4Ti4O15 Ferroelectric Ceramics |
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| Zhang Fengqing, Fan Suhua, Chen Yang, Dong Pengchao, Wang Yingying,Tian Qingbo.Properties of the Ca0.075Sr0.925Bi4Ti4O15 Ferroelectric Ceramics[J].Rare Metal Materials and Engineering,2011(Z1):425-427. |
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| Authors: | Zhang Fengqing Fan Suhua Chen Yang Dong Pengchao Wang Yingying Tian Qingbo |
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| Affiliation: | (Shandong Jianzhu University, Jinan 250101, China) |
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| Abstract: | Bismuth-layered compound Ca0.075Sr0.925Bi4Ti4O15 (CSBTi)) ferroelectric ceramic samples were prepared by sol-gel method. Effects of different sintering temperatures on the crystal structure, microstructure and ferroelectric properties of the CSBTi ferroelectric ceramics were studied. It is found that crystals developed entirely and a-axis orientation was enhanced at 1180 ℃. At this sintering temperature, the highest remnant polarization 2Pr and coercive field Ec were 19.4 μC/cm2 and 72.5 kV/cm, respectively. These results can be explained as follows: Bismuth in the pseudo-perovskite blocks evaporated easily at high sintering temperatures that led to oxygen vacancies. The Curie temperature and the piezoelectric constant d33 of the sample were 543 ℃ and 9.8 pC/N, respectively. It is also found that the ceramic samples are relaxor ferroelectricity from the patterns of dielectric constant as a function of frequency. |
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| Keywords: | ferroelectrics ceramics Curie temperature electrical properties |
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