| La掺杂Sr0.4Pb0.6TiO3陶瓷热敏机理研究 |
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| 引用本文： | 赵景畅,李龙土,桂治轮.La掺杂Sr0.4Pb0.6TiO3陶瓷热敏机理研究[J].高技术通讯,2003,13(3):71-74. |
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| 作者姓名： | 赵景畅 李龙土 桂治轮 |
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| 作者单位： | 清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京,100084 |
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| 摘 要： | 液相掺杂施主元素La，在1100－1200℃烧结制备出了Sr0.4Pb0.6TiO3基陶瓷。该陶瓷具有显著的NTCR－PTCR复合效应，其室温电阻率随烧结温度提高而增大；而添加少量PbO用于补偿铅损失，则明显降低了陶瓷的室温电阻率及减弱了居里点下的NTCR效应。同时利用XRD，SEM和TEM分别对陶瓷的相结构，形貌和畴结构进行了研究。根据实验结果，探讨了La掺杂Sr0.4Pb0.6TiO3陶瓷的半导化机理及其热敏特性。
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| 关 键 词： | La掺杂 热敏机理 （Sr Pb）／TiO3陶瓷 镧掺杂 半导化机理 半导体陶瓷 阻温特性 |
Study on the Thermal Sensitivity of La-doped (Sr, Pb)TiO3 Ceramics |
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| Zhao Jingchang,Li Longtu,Gui Zhilun.Study on the Thermal Sensitivity of La-doped (Sr, Pb)TiO3 Ceramics[J].High Technology Letters,2003,13(3):71-74. |
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| Authors: | Zhao Jingchang Li Longtu Gui Zhilun |
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| Abstract: | La-doped Sr 0.4Pb 0.6TiO 3 ceramics are fabricated by solid state reaction method, the samples exhibit distinct NTCR effect below the Curie temperature (Tc) and typical PTCR effect above Tc. The samples' room-temperature resistivities and NTCR effects increase with elevating sintering temperature. The influence of doping excess PbO on the properties of Sr 0.4Pb 0.6TiO 3-based thermistors is investigated. The phase structure, morphology and domain-structure of samples are investigated using XRD, SEM and TEM respectively. According to the results, the semiconduction mechanism and thermal sensitivity of La-doped Sr 0.4Pb 0.6TiO 3 ceramics are discussed. |
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| Keywords: | PTCR NTCR |
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