| BaTiO3纳米粉体的制备和性能 |
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| 引用本文： | 栾伟玲,高濂,郭景坤.BaTiO3纳米粉体的制备和性能[J].无机材料学报,1998,13(4):456-462. |
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| 作者姓名： | 栾伟玲 高濂 郭景坤 |
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| 作者单位： | 中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室!上海，200050，中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室!上海，200050，中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室!上海，200050 |
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| 摘 要： | 采用溶胶-凝胶和溶胶-沉淀的方法合成了立方相纳米BaTiO3粉体．溶胶-凝胶法制备的粉体平均粒径为19nm，颗粒分布均匀、含少量BaCO3．溶胶-沉淀法得到了纯BaTiO3粉，平均粒径为42nm，存在部分团聚．两种方法相比，溶胶-凝胶法的粉体烧结密度较高，介电性能较好．讨论了两种合成方法的晶粒形成机理及对材料微观结构和介电性能的影响．
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| 关 键 词： | 钛酸钡 纳米材料 溶胶-凝胶 溶胶-沉淀 |
| 收稿时间： | 1997-7-8 |
| 修稿时间： | 1997-8-15 |
Preparation and Characterization of Nanocrystalline BaTiO3 |
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| LUAN Wei-Ling,GAO Lian,GUO Jing-Kun.Preparation and Characterization of Nanocrystalline BaTiO3[J].Journal of Inorganic Materials,1998,13(4):456-462. |
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| Authors: | LUAN Wei-Ling GAO Lian GUO Jing-Kun |
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| Affiliation: | StateKeyLaborotoryonHighPeformanceCeramicsandSuperfineMicrostructure;ShanghaiInstituteofCeramics;ChineseAcademyofSciencesShanghai200050China |
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| Abstract: | Nanocrystallines of BaTiO3 with a cubic phase were synthesized by two methods, sol-gel method and sol-precipitation method. Powders obtained by the sol-gel method was homogeneous and ultrafine (19nm), with a few amounts of BaCO3. Pure crystallines of BaTiO3 with larger grain size of 42nm and some degrees of aggregates were obtained by the sol-precipitation method. The sol-gel powders had higher sintering density and better dielectric property. Mechanisms for the evolution of crystalline BaTiO3 in the sol-gel and the sol-precipitation methods were discussed in the context of microstructure and dielectric properties. |
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| Keywords: | barium titanate nano crystalline sol-gel sol-precipitation |
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