| 硬脂酸凝胶法制备的BaTiO_3微粉和陶瓷的特性 |
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| 引用本文： | 任天令,张沛霖,王玉国,钟维烈,赵焕绥,王晓慧.硬脂酸凝胶法制备的BaTiO_3微粉和陶瓷的特性[J].山东大学学报(理学版),1994(4). |
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| 作者姓名： | 任天令 张沛霖 王玉国 钟维烈 赵焕绥 王晓慧 |
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| 作者单位： | 吉林大学化学系 |
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| 摘 要： | 要硬脂酸凝胶法制备了ＢａＴｉＯ３微粉和陶瓷．ＸＲＤ、介电、压电和热释电性的研究结果表明，所有样品在室温下都呈立方钙钛矿结构，没有铁电性，但陶瓷有低温铁电性．ＸＲＤ对这些样品所测的晶粒尺寸都有常规ＢａＴｉＯ３的铁电临界尺寸以下．基于表面层的成份偏析，我们对其晶粒生长困难给出了初步解释．
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| 关 键 词： | 硬脂酸凝胶法 BaTiO_3 铁电性 |
PECULIARITIES OF BaTiO_3 POWDERS AND CERAMICS PREPARED BY STEARIC ACID-GEL METHOD |
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| Ren Tianling,Zhang Peilin,Wang Yuguo, Zhong Weilie.PECULIARITIES OF BaTiO_3 POWDERS AND CERAMICS PREPARED BY STEARIC ACID-GEL METHOD[J].Journal of Shandong University,1994(4). |
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| Authors: | Ren Tianling Zhang Peilin Wang Yuguo Zhong Weilie |
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| Abstract: | Stearic acid-gel method was used to prepare barium titanate ultrafine powders and ceramics. All the samples were studied by XRD, deelectric, piezoelectric and pyroelectric mesurements.The results indicate that they all show a cubic perovskite structure and have no ferroelectricity at room temperature,but the ceramics have ferroelectricity at low temperature. Their grain size given by XRD methood is below the ferroelectric critical size of ordinary BaTiO3. A tentative explanation is presented for the peculiarities based on the nonstoichiometry at the surface layer. |
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| Keywords: | stearic acid-gel method BaTiO_3 ferroelectricity |
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