| Ferroelectric behaviour of 30nm BaTiO3 ceramics prepared by high pressure assisted sintering |
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| 作者姓名： | 肖长江 迟振华 李凤英 冯少敏 靳常青 王晓慧 邓湘云 李龙土 |
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| 作者单位： | Institute of Physics, Chinese Academy of
Science, Beijing 100080, China;Institute of Physics, Chinese Academy of
Science, Beijing 100080, China;Institute of Physics, Chinese Academy of
Science, Beijing 100080, China;Institute of Physics, Chinese Academy of
Science, Beijing 100080, China;Institute of Physics, Chinese Academy of
Science, Beijing 100080, China;State Key Laboratory of New Ceramics and Fine Processing,
Department of Materials Science and Engineering, Tsinghua
University, Beijing 100084, China;State Key Laboratory of New Ceramics and Fine Processing,
Department of Materials Science and Engineering, Tsinghua
University, Beijing 100084, China;State Key Laboratory of New Ceramics and Fine Processing,
Department of Materials Science and Engineering, Tsinghua
University, Beijing 100084, China |
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| 基金项目： | Project supported
by the Ministry of Sciences and Technology of China through 973
project (Grant No 2002B613301). |
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| 摘 要： | Dense nanocrystalline BaTiO3 ceramics with a homogeneous grain size of 30 nm was obtained by pressure assisted sintering. The ferroelectric behaviour of the ceramics was characterized by the dielectric peak at around 120 ℃, the P-E hysteresis loop and some ferroelectric domains. These experimental results indicate that the critical grain size for the disappearance of ferroelectricity in nanocrystalline BaTiO3 ceramics fabricated by pressure assisted sintering is below 30 nm. The ferroelectric property decreasing with decreasing grain size can be explained by the lowered tetragonality and the ＇dilution＇ effect of grain boundaries.
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| 关 键 词： | 钛酸钡陶瓷 高压烧结 纳米晶陶瓷 铁电性质 |
| 收稿时间： | 2006-08-13 |
| 修稿时间： | 2006-08-13 |
Ferroelectric behaviour of 30nm BaTiO3 ceramics prepared by high pressure assisted sintering |
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| Xiao Chang-Jiang,Chi Zhen-Hu,Li Feng-Ying,Feng Shao-Min,Jin Chang-Qing,Wang Xiao-Hui,Deng Xiang-Yun and Li Long-Tu.Ferroelectric behaviour of 30nm BaTiO3 ceramics prepared by high pressure assisted sintering[J].Chinese Physics B,2007,16(10):3125-3128. |
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| Authors: | Xiao Chang-Jiang Chi Zhen-Hu Li Feng-Ying Feng Shao-Min Jin Chang-Qing Wang Xiao-Hui Deng Xiang-Yun and Li Long-Tu |
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| Institution: | Institute of Physics, Chinese Academy of Science, Beijing 100080, China b |
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| Abstract: | Dense nanocrystalline BaTiO3 ceramics with a homogeneous
grain size of 30\,nm was obtained by pressure assisted
sintering. The ferroelectric behaviour of the ceramics was
characterized by the dielectric peak at around 120\,\du, the
$P$-$E$ hysteresis loop and some ferroelectric domains. These
experimental results indicate that the critical grain size for
the disappearance of ferroelectricity in nanocrystalline
BaTiO3 ceramics fabricated by pressure assisted sintering
is below 30\,nm. The ferroelectric property decreasing with
decreasing grain size can be explained by the lowered
tetragonality and the `dilution' effect of grain boundaries. |
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| Keywords: | BaTiO3 pressure assisted
sintering nanocrystalline ceramics ferroelectric behaviour |
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