| 包覆MgO对BaTiO3基陶瓷性能的影响 |
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| 引用本文： | 涂伟,丁士华,宋天秀,王红妮,张静.包覆MgO对BaTiO3基陶瓷性能的影响[J].西华大学学报(自然科学版),2012(6):13-15. |
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| 作者姓名： | 涂伟 丁士华 宋天秀 王红妮 张静 |
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| 作者单位： | 西华大学材料科学与工程学院 |
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| 基金项目： | 国家自然科学基金项目(11074203) |
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| 摘 要： | 采用均匀沉淀法将MgO均匀地包覆在BaTiO3基陶瓷粉体表面，制备包覆MgO的BaTiO3基陶瓷复合粒子，研究了不同包覆量对BaTiO3基陶瓷的微观结构、微观形貌、介电性能、绝缘性能和击穿电压的影响。实验表明：包覆剂MgO能有效抑制晶粒长大，从而获得晶粒均匀的陶瓷，此细晶效应是由于晶界区MgO的抑制作用；MgO有助于形成“壳-芯”结构晶粒，降低并展宽BaTiO3基陶瓷的ε峰，增加电阻率和击穿电压强度。
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| 关 键 词： | 钛酸钡 氧化镁 包覆 “壳-芯”结构 |
Effects of MgO Coating on the Properties of BaTiO3-based Ceramics |
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| TU Wei,DING Shi-hua,SONG Tian-xiu,WANG Hong-ni,ZHANG Jing.Effects of MgO Coating on the Properties of BaTiO3-based Ceramics[J].Journal of Xihua University:Natural Science Edition,2012(6):13-15. |
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| Authors: | TU Wei DING Shi-hua SONG Tian-xiu WANG Hong-ni ZHANG Jing |
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| Affiliation: | School of Materials Science and Engineering,Xihua University,Chengdu 610039 China |
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| Abstract: | MgO - coated BaTiO3 - based composite particles were prepared from BaTiO3 - based particles coated uniformly with MgO by a heterogeneous precipitation method. The effect of MgO coating on the microstructure, micromorphology, dielectric properties, insulation resistivity and breakdown voltage of BaTiO3 - based ceramics with various content was studied. The results show that MgO can effectively inhibit grain growth, resulting in a uniform grain size of ceramics, the fine grain effect is due to MgO which acts as a grain growth inhibitor in the grain boundary; MgO is helpful for the formation of ＂shell - core＂ structure, lowers and broadens e peak of BaTiO3 - based ceramics, and increases insulation resistivity and breakdown voltage. |
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| Keywords: | BaTiO3 MgO coating ＂shell-core＂ structure |
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