High-temperature dielectric relaxation mechanism in Ba4SmFe0.5Nb9.5O30 tungsten bronze ceramics

High-temperature dielectric relaxation mechanism in Ba4SmFe0.5Nb9.5O30 tungsten bronze ceramics
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Ba4SmFe0.5Nb9.5O30钨青铜陶瓷的高温介电弛豫机制

DOI:
10.1016/j.ceramint.2018.08.109
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发表时间:
2018-11
影响因子:
5.2
通讯作者:
Fang Liang
Fang Liang
中科院分区:
材料科学1区
文献类型:
--
作者:
Hu Changzheng;Guo Zhe;Wu Shan;Sun Zhen;Li Chunchun;Liu Laijun;Fang Liang

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研究了未填充钨青铜陶瓷Ba_4SmFe_(0.5)Nb_(9.5)O_(30)的高温烧结性能。温度介电性能和变温XRD数据以及XPS数据表明,BSFN陶瓷在25 °C至450 °C之间没有相变;在350 °C附近的高温弛豫行为与氧缺陷密切相关。Ba_4SmFe_(0.5)Nb_(9.5)O_(30)陶瓷电导弛豫的频率依赖关系符合Arrhenius方程,Ea~ 0.65 eV。
The high temperature dielectrics properties of unfilled tungsten bronze ceramics, Ba4SmFe0.5Nb9.5O30, were studied. The temperature dielectric properties and the variable temperature XRD data, in addition to the XPS data indicated that BSFN ceramics have no phase changes from 25 °C to 450 °C; the high temperature relaxation behaviour around 350 °C is closely related to the oxygen defects. Frequency dependence of temperature electrical conductivity relaxation of Ba4SmFe0.5Nb9.5O30ceramics was well fitted by the Arrhenius relationship with Ea~ 0.65 eV.
新型Ba4SmFe0.5Nb9.5O30钨青铜陶瓷的弛豫行为和铁电性能
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