Influence of sintering schedule on the electrical properties of Mn(NO3)2-doped Ba0.92Ca0.08TiO3 PTCR ceramics

稀有金属（英文版）, 2004, 23(3): 274-278.

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1.Department of Materials of Science and Engineering, Tsinghua University, Beijing 100084, China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

2.Department of Materials of Science and Engineering, Tsinghua University, Beijing 100084, China

3.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

4.Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China

基金项目: 教育部博士后科学基金(023202238)

Influence of sintering schedule on the electrical properties of Mn(NO3)2-doped Ba0.92Ca0.08TiO3 PTCR ceramics

Keywords： positive temperature coefficient resistance

The relationship of electrical properties of Mn-doped Ba0.92Ca0.08TiO3 PTCR (positive temperature coefficient resistance) ceramics with two sintering schedules was discussed. Using TEM (transmission electron microscope) combined with EDS (energy dispersive X-ray spectrometer), the Mn ions distributed at grain boundaries were analyzed. The results show that the PTCR effect of Mn-doped PTCR ceramics is more dependent on the sintering schedule than those of Mn free.The phenomenon may be caused by the valence states variance of Mn ions segregated at the grain boundaries.

参考文献

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Influence of sintering schedule on the electrical properties of Mn(NO3)2-doped Ba0.92Ca0.08TiO3 PTCR ceramics

参考文献