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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 |
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| Cite this article: |
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LIU Guo-Zhen, GU Hao-Shuang, WANG Chun-Chang et al 2007 Chin. Phys. Lett. 24 2387-2389 |
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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.
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| Keywords:
77.84.Dy
61.72.Ww
77.22.Ej
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Received: 27 April 2007
Published: 25 July 2007
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