Dielectric and Ferroelectric Properties of La-Doped SrBi2Nb2O9 Ceramics
LIU Guo-Zhen1, GU Hao-Shuang2, WANG Chun-Chang1, QIU Jie1, LU Hui-Bin1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 1000802Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062
Dielectric and Ferroelectric Properties of La-Doped SrBi2Nb2O9 Ceramics
LIU Guo-Zhen1;GU Hao-Shuang2;WANG Chun-Chang1;QIU Jie1; LU Hui-Bin1
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 1000802Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062
摘要Sr1-xLa2x/3Bi2Nb2O9 (0 ≤x≤ 0.2) ceramic samples are prepared by the solid-state reaction method. Their structure, dielectric and ferroelectric properties are investigated. The incorporation of La3+ improves the densification and decreases the grain size of the ceramics without changing the crystal structure. The remanent polarization 2Pr increases with increasing La content and reaches a maximum value of 22.8μC/cm2 at x=0.125, which is approximately 60% larger than that of pure SrBi2Nb2O9. The Curie temperature keeps almost unchanged at a value of about 440°C. The relationship between doping and the ferroelectric and dielectric properties are discussed.
Abstract：Sr1-xLa2x/3Bi2Nb2O9 (0 ≤x≤ 0.2) ceramic samples are prepared by the solid-state reaction method. Their structure, dielectric and ferroelectric properties are investigated. The incorporation of La3+ improves the densification and decreases the grain size of the ceramics without changing the crystal structure. The remanent polarization 2Pr increases with increasing La content and reaches a maximum value of 22.8μC/cm2 at x=0.125, which is approximately 60% larger than that of pure SrBi2Nb2O9. The Curie temperature keeps almost unchanged at a value of about 440°C. The relationship between doping and the ferroelectric and dielectric properties are discussed.
LIU Guo-Zhen;GU Hao-Shuang;WANG Chun-Chang;QIU Jie; LU Hui-Bin. Dielectric and Ferroelectric Properties of La-Doped SrBi2Nb2O9 Ceramics[J]. 中国物理快报, 2007, 24(8): 2387-2389.
LIU Guo-Zhen, GU Hao-Shuang, WANG Chun-Chang, QIU Jie, LU Hui-Bin. Dielectric and Ferroelectric Properties of La-Doped SrBi2Nb2O9 Ceramics. Chin. Phys. Lett., 2007, 24(8): 2387-2389.
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