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硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (3): 931-935.

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Co2O3/Co3O4掺杂量对BaBiO3基热敏陶瓷NTC特性的影响

霍冉;刘心宇;袁昌来;刘笑   

  1. 桂林电子科技大学信息与通信学院,桂林,541004;桂林电子科技大学信息与通信学院,桂林 541004;桂林电子科技?笱Ч阄髦氐阈畔⒉牧鲜笛槭?桂林 541004;桂林电子科技大学广西重点信息材料实验室,桂林,541004
  • 出版日期:2017-03-15 发布日期:2021-01-18
  • 基金资助:
    国家自然科学基金(61561011)

Effect of Co2O3/Co3O4 Dosage on the NTC Characteristics of the BaBiO3 Based Thermistor Ceramics

HUO Ran;LIU Xin-yu;YUAN Chang-lai;LIU Xiao   

  • Online:2017-03-15 Published:2021-01-18

摘要: 采用X射线衍射、扫描电子显微镜和ρ-t特性测试仪,研究了不同Co2O3/Co3O4掺杂量对BaCoⅢxBi1-xO3(x=0.02, 0.04, 0.06, 0.08) 和BaCoⅡx/3CoⅢ2x/3Bi1-xO3(x=0.02, 0.04, 0.06, 0.08)热敏陶瓷的物相、显微结构及电性能的影响.结果表明:BaCoⅢxBi1-xO3和BaCoⅡx/3CoⅢ2x/3Bi1-xO3的基本相均为钙钛矿结构的连续固溶体;Co2O3/Co3O4的含量能直接影响电学性能.试样的室温电阻率ρ25和B25~85值均随着Co2O3/Co3O4的增加呈现先下降后回升的趋势;BaCoⅢ0.06Bi0.94O3陶瓷展现出较好的NTC特性,其ρ25和B25~85值分别为12.19 Ω·cm和717 K;BaCoⅡ0.02CoⅢ0.04Bi0.94O3也获得了良好的NTC特性,其ρ25和B25~85值分别为12.32 Ω·cm和1069 K.

关键词: BaBiO3;热敏陶瓷;NTC;电阻率

Abstract: The effects of Co2O3/Co3O4-doped amount on the phase structure, microstructure and electrical properties of BaCoⅢxBi1-xO3 (x=0.02,0.04,0.06,0.08) and BaCoⅡx/3CoⅢ2x/3Bi1-xO3 (x=0.02,0.04,0.06,0.08) based thermistor ceramics were investigated by X-ray diffraction, scanning electron microscope and ρ-t characteristic tester.The results show that the matrix phase is a continuous solid solution with pervoskite structure.The content of Co2O3/ Co3O4 has dramatically impact on the electrical properties.With the increase of the Co2O3/ Co3O4-doped amount, both ρ25 and B25~85values of the ceramic sample reduce initially and then increased.The BaCoⅢ0.06Bi0.94O3 ceramics show excellent NTC properties of ρ25=12.19 Ω·cm, B25~85=717 K.A good NTC properties of ρ25=12.32 Ω·cm and B25~85=1069 K was also obtained for BaCoⅡ0.02CoⅢ0.04Bi0.94O3.

Key words: BaBiO3;thermistor ceramic;NTC;resistivity

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