| 镧掺杂对PMN—PT陶瓷结构与性能的影响 |
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| 引用本文： | 张金选.镧掺杂对PMN—PT陶瓷结构与性能的影响[J].陕西师范大学学报,2001,29(2):63-66. |
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| 作者姓名： | 张金选 |
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| 作者单位： | 张金选（陕西师范大学生命科学学院,陕西西安 710062） |
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| 摘 要： | 采用熔盐法制备了0．82MN－0．28PT－xLa陶瓷，研究了掺镧离子对0．82PMN－0．18PT陶瓷相结构、显微结构以及介电性能的影响。结果表明，随着掺镧含量的增加，不仅预烧粉体和陶瓷的焦绿石相含量逐渐增加，而且在显微结构中逐渐出现了小颗粒，气孔增多，陶瓷的致性逐渐下降，严重恶化了介电性能，导致介电常数急剧下降，但蛤电温度稳定性却大幅度提高。
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| 关 键 词： | 镧掺杂 相结构 显微结构 介电性能 弛豫铂电陶瓷 PMN－PT陶瓷 |
| 文章编号： | 1001-3857(2001)02-0063-04 |
| 修稿时间： | 2000年10月10 |
Effect of Lanthanum-doping on structure and dielectric properties for PMN-PT ceramics |
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| ZHANG Jin_xuan.Effect of Lanthanum-doping on structure and dielectric properties for PMN-PT ceramics[J].Journal of Shaanxi Normal University: Nat Sci Ed,2001,29(2):63-66. |
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| Authors: | ZHANG Jin_xuan |
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| Abstract: | PMN-0.18PT-xLa% ceramics are prepared by molten salt synthesis (MSS). The influence of La-doping on phase structure, microstructure and dielectric properties are investigated. The results indicate that with the increment of Lanthanum (La) content, not only the content of perovskite phase in calcined powders and sintered ceramics decreased,and pyrochlore phase content increased gradually, but small particles are also produced in the microstructure pore increased, density of ceramics decreased, and the dielectric properties decreased drastically. But the temperature stability of dielectric property increased. |
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| Keywords: | La-doping Pb(Mg 1/3 Nb 2/3 )O 3-PbTiO 3 ceramics phase structure microstructure dielectric property |
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