| SrxPb1—xTiO3基陶瓷材料热敏特性研究 |
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| 引用本文： | 赵景畅,李龙土,桂治轮,齐建全.SrxPb1—xTiO3基陶瓷材料热敏特性研究[J].压电与声光,2001,23(2):134-137. |
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| 作者姓名： | 赵景畅 李龙土 桂治轮 齐建全 |
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| 作者单位： | 清华大学材料科学与工程系, |
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| 摘 要： | 以Sr
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| 关 键 词： | 钛酸铅锶 陶瓷材料 热敏特性 |
| 文章编号： | 1004-2474(2001)02-0134-04 |
| 修稿时间： | 2000年9月26日 |
Study on the Properties of
SrxPb1-xTiO3-based Thermistors |
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| ZHAO Jing-chang,LI Long-tu,GUI Zhi-lun,QI Jian-quan.Study on the Properties of
SrxPb1-xTiO3-based Thermistors[J].Piezoelectrics & Acoustooptics,2001,23(2):134-137. |
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| Authors: | ZHAO Jing-chang LI Long-tu GUI Zhi-lun QI Jian-quan |
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| Abstract: | A kind of semiconductive ceramics based on SrxPb1-xTiO3 was prepared by traditional ceramics route,which exhibited distinct NTC effect below curie temperature and classical PTC effect above curie temperature.The morphology of ceramics were observed using SEM and the resistivity was measured from room temperature up to 400℃.At the same time,the impedance spectoscopy was also used to analyze the resistance evolution of grain boundary.The results showed that the precipitating of SiO2 on the grain boundary can increase the resistivity and improve the NTC effect,but it is not the fundamental cause of NTC effect.It is estimated that the volatilization of Pb and the different concentration of Pb2+ from grain to grain-boundary are the radical elements resulting in the obvious NTC effect of SrxPb1-xTiO3 ceramics below curie temperature.The semiconducting mechanism of SrxPb1-x TiO3 ceramics is also discussed. |
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