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La掺杂SrBi4Ti4O15铁电材料性能研究

朱 骏 卢网平 刘秋朝 毛翔宇 惠 荣 陈小兵

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La掺杂SrBi4Ti4O15铁电材料性能研究

朱 骏, 卢网平, 刘秋朝, 毛翔宇, 惠 荣, 陈小兵

Study of properties of lanthanum doped SrBi4Ti4O15 ferroelectric ceramics

Zhu Jun, Lu Wang-Ping, Liu Qiu-Chao, Mao Xiang-Yu, Hui Rong, Chen Xiao-Bing
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  • 按x=0.00,0.10,0.25,0.50,0.75和1.00,采用固相烧结工艺,制备了不同La掺杂量的SrBi4-xLaxTi4O15的陶瓷样品. 用x射线衍射对其微结构进行了分析,并测量了铁电、介电性能.结果发现,La掺杂未改变SrBi4Ti 4O15的晶体结构.随掺杂量的增加,样品的矫顽场(Ec)下降,剩余极化(2P
    Ceramic samples SrBi4-xLaxTi4O15 (x =0.00, 0.10, 0.25, 0.50, 0.75, 1.00), have been prepared by solid-state reaction method. T heir structure was analyzed by x-ray diffraction, and their dielectricity and fe rroelectricity were measured. It is found that La-doping does not change the cry stal structure of SrBi4Ti4O15. The remnant pola rization (2P4) in creases at first, then decreases with the increase of La content. The 2P4 reaches a maximum value of 24.2 μC·cm-2, when x is 0.25. The c oerc ive field of SrBi3.75La0.25Ti4O15 is 60.8 kV·cm-1 . The 2P4 increases by about 50% and the Ec decrease s near 25%, compa red with these of SrBi4Ti4O15. Obviously, the f erroelectricity of SrBi 4Ti4O15 is improved by lanthanum doping. The te mperature of p hase transition (Tc) decreased with La cloping. The Tc of SrBi3.75La0.25Ti4O15 is 451 ℃. When x=0.75 and 1.00, the SrBi4-xLaxTi4O15 exhibit the typical characteristics of relaxor ferro electrics.
    • 基金项目: 江苏省教育厅自然科学基金(批准号:01KJB140011)资助的课题.
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出版历程
  • 收稿日期:  2002-09-23
  • 修回日期:  2002-11-18
  • 刊出日期:  2003-03-05

La掺杂SrBi4Ti4O15铁电材料性能研究

  • 1. 扬州大学物理科学与技术学院,扬州 225002
    基金项目: 

    江苏省教育厅自然科学基金(批准号:01KJB140011)资助的课题.

摘要: 按x=0.00,0.10,0.25,0.50,0.75和1.00,采用固相烧结工艺,制备了不同La掺杂量的SrBi4-xLaxTi4O15的陶瓷样品. 用x射线衍射对其微结构进行了分析,并测量了铁电、介电性能.结果发现,La掺杂未改变SrBi4Ti 4O15的晶体结构.随掺杂量的增加,样品的矫顽场(Ec)下降,剩余极化(2P

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