| Original Articles |
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Dielectric Properties of Fine-Grained BaTiO3 Ceramics under High Pressure |
| ZHU Jin-Long1;XIAO Chang-Jiang1;CHI Zhen-Hua1;FENG Shao-Min1;LI Feng-Ying1;JIN Chang-Qing1;DENG Xiang-Yun2;WANG Xiao-Hui2;LI Long-Tu2;DAI Zhong-Hua3;WANG Jun3;XU Zhuo3 |
| 1Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Department of Materials Sciences, Tsinghua University, Beijing 100084
3Laboratory for Electronic Ceramics, Xi’an Jiaotong University, Xi’an 710049 |
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| Cite this article: |
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ZHU Jin-Long, XIAO Chang-Jiang, CHI Zhen-Hua et al 2006 Chin. Phys. Lett. 23 1631-1633 |
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Abstract We investigate the temperature dependence of the dielectric constant of BaTiO3 ceramic with coarse to nano-grain size under different hydrostatic high pressures up to 5000bar in the range between room temperature and 200°C. The ferroelectric-to-paraelectric phase transition temperatures Tc are determined from the peak of dielectric constant versus temperature. The values of average grain-size are estimated from the SEM images. It is found that the magnitude of dTc/dp varies considerably from sample to sample depending on grain size. The Curie point Tc of the sample with small grain size decreases more sharply than that of samples with larger one.
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| Keywords:
81.07.Bc
77.80.-e
74.62.Fj
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Published: 01 June 2006
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| PACS: |
81.07.Bc
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(Nanocrystalline materials)
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77.80.-e
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(Ferroelectricity and antiferroelectricity)
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74.62.Fj
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(Effects of pressure)
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