| 锰掺杂CBT压电陶瓷的交流阻抗谱研究 |
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| 引用本文： | 顾大国,李国荣,郑嘹赢,丁爱丽,殷庆瑞.锰掺杂CBT压电陶瓷的交流阻抗谱研究[J].电子元件与材料,2007,26(10):18-20. |
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| 作者姓名： | 顾大国 李国荣 郑嘹赢 丁爱丽 殷庆瑞 |
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| 作者单位： | 中国科学院,上海硅酸盐研究所,上海,200050 |
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| 基金项目： | 国家自然科学基金
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国家重点基础研究发展计划(973计划) |
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| 摘 要： | 通过固相反应法制备了锰掺杂的CaBi4Ti4O15陶瓷,掺杂量x(MnCO3)从0到3.0%。添加锰以后,材料的直流电阻率先升高,再降低。通过交流阻抗谱分析,得到了各组分晶粒、晶界对电导的贡献。发现在少量掺杂时,锰原子同时进入晶粒及晶界,并改善高温下的导电性能。掺杂量为1.0%时,直流电阻率最大。但当x(MnCO3)大于3.0%时,锰原子开始富集于晶界,使材料性能恶化。
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| 关 键 词： | 无机非金属材料 交流阻抗谱 电阻率 压电陶瓷 |
| 文章编号： | 1001-2028（2007）10-0018-03 |
| 修稿时间： | 2007-07-08 |
AC impedance spectrum study of Mn doped CaBi4Ti4O15 piezoelectric ceramics |
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| GU Da-guo,LI Guo-rong,ZHENG Liao-ying,DING Ai-li,YIN Qing-rui.AC impedance spectrum study of Mn doped CaBi4Ti4O15 piezoelectric ceramics[J].Electronic Components & Materials,2007,26(10):18-20. |
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| Authors: | GU Da-guo LI Guo-rong ZHENG Liao-ying DING Ai-li YIN Qing-rui |
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| Affiliation: | Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China |
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| Abstract: | CaBi4Ti4O15 piezoelectric ceramics with Mn addition (0～3.0%) were prepared by solid state reaction technique. The DC resistivity of samples increases when Mn content was lower than 1.0% and then begins to decrease with more Mn addition. The AC impedance spectrum technique was used to analyze the contribution of both grains and grain boundaries to the conductivity. It is found that with small Mn doping,Mn not only enhances the resistivity enter grain and grains but also of grain boundaries in the meantime. The largest resistivity appear when Mn content is 1.0%. However,the resistivity of grain boundary decreases dramatically as Mn content is higher than 3.0%. |
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| Keywords: | non-metallic inorganic material AC impedance spectrum resistivity piezoelectric ceramics |
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