Fabrication of high Tc BaTiO3-(Bi0.5Na0.5)TiO3 lead-free positive temperature coefficient of resistivity ceramics

被引：0
|
作者：
Leng, Sen-Lin [1 ]
Jia, Fei-Hu [1 ]
Zhong, Zhi-Kun [1 ]
Yang, Qin-Fang [1 ]
Li, Guo-Rong [2 ]
Zheng, Liao-Ying [2 ]
机构：
[1] Institute of Physics and Electronics Engineering, Tongren University, Tongren
[2] Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai
来源：
Wuji Cailiao Xuebao/Journal of Inorganic Materials | 2015年 / 30卷 / 06期
关键词：
BaTiO[!sub]3[!/sub]-(Bi[!sub]0.5[!/sub]Na[!sub]0.5[!/sub])TiO[!sub]3[!/sub; Fabrication; Lead-free; Positive temperature coefficient of resistivity;
D O I：
10.15541/jim20140568
中图分类号：
学科分类号：
摘要：
High curie temperature (Tc) (1-xmol%)BaTiO3-xmol%(Bi0.5Na0.5)TiO3(BBNTx) lead-free positive temperature coefficient of resistivity(PTCR) ceramics were prepared by the conventional solid state reaction sintering method. XRD patterns showed that all BBNTx samples had a single tetragonal phase perovskite structure. The SEM results showed that as the content of BNT increased from 1mol% to 60mol%, the average grain size monotonously decreased. The 0.2mol% Nb-doped BBNT1 ceramic sintered in air had low room-temperature resistivity (ρ25) of ~102 Ω·cm and high resistivity jump (maximum resistivity [ρmax]/minimum resistivity [ρmin]) of ~4.5 orders of magnitude with Tc at about 150℃. The 0.3mol% Nb-doped BBNTx(10≤x≤60) ceramics, sintered in N2, also showed distinct PTCR effect with Tc between 180℃ and 235℃. As the BNT content increased, the ρ25 of the BBNTx rapidly increased with the resistivity jump decrease. ©, 2015, Science Press. All right reserved.
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页码：576 / 580
页数：4
相关论文
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