Lanthanide doping effects on properties of Sr2Bi4Ti5O18ceramics

被引：0
|
作者：
Qiang, Feng [1 ]
Zhu, Jun [1 ]
Chen, Xiaobing [1 ]
机构：
[1] Coll. of Phys. Sci. and Technol., Yangzhou Univ., Yangzhou 225002, China
来源：
Journal of Rare Earths | 2004年 / 22卷 / SUPPL. 2期
关键词：
Crystal structure - Dielectric losses - Doping (additives) - Dysprosium - Lanthanum - Samarium;
D O I：
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学科分类号：
摘要：
Ceramic samples of samarium, dysprosium and lanthanum doped Sr2Bi4Ti5O18(SBTi) were prepared by solid-state reaction. The remnant polarization (2Pr) increases at first, then decreases with the increase of doping content. The 2Prfor Sm and Dy doped SBTi reached a maximum value of 18.2 μC·cm-2and 20.1 (μC-cm-2, respectively, when doping content was 0.01. La doped SBTi has maximum 2Prvalue of 18.4 μC·cm-2with doping content of 0.05. The variation of ferroelectric properties of Sr2Bi4-xLnxTi5O18(Ln = Sm, Dy and La) should be determined by the competition of the decrease of oxygen vacancy concentration and the relief of structural distortion.
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页码：163 / 166
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