| 稀土锆酸盐Sm_2Zr_2O_7的二价离子掺杂研究 |
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| 引用本文： | 瞿志学,万春磊,潘伟.稀土锆酸盐Sm_2Zr_2O_7的二价离子掺杂研究[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 瞿志学 万春磊 潘伟 |
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| 作者单位： | 清华大学,先进陶瓷与精细工艺国家重点实验室,北京,100084 |
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| 摘 要： | 研究了二价元素Ca、Sr、Ba在稀土锆酸盐Sm_2Zr_2O_7中掺杂固溶情况,并采用激光闪射法测定了固溶样品的热导率.X射线衍射数据表明,相对于Mg~(2+)离子,Ca~(2+)、Sr~(2+)、Ba~(2+)离子在Sm_2Zr_2O_7中的固溶度并不大,在较小的掺杂量时,就有相应的锆酸盐化合物相析出,这是掺杂机制的不同造成的;而固溶样品的热导率测试结果说明,掺杂能降低材料的热导率,但降低幅度不大.
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| 关 键 词： | 热障涂层 稀土锆酸盐 二价掺杂 热导率 |
Bivalent Ions Doping in Rare-Earth Zirconate Sm_2Zr_2O_7 |
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| Qu Zhixue,Wan Chunlei,Pan Wei.Bivalent Ions Doping in Rare-Earth Zirconate Sm_2Zr_2O_7[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Qu Zhixue Wan Chunlei Pan Wei |
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| Affiliation: | Qu Zhixue,Wan Chunlei,Pan Wei (State Key Laboratory of New Ceramics , Fine Progressing,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Bivalent ions doping in rare-earth zirconate Sm2Zr2O7 was studied. The composition range in which a complete solid solution forms was investigated for Ca2+/Sr2+/Ba2+-doped samples and thermal conductivities of the samples with complete solid solution was measured by means of laser flash method. The XRD patterns show that the solid solubility of Ca2+,Sr2+and Ba2+ ions in the lattice of Sm2Zr2O7 is small compared with Mg2+ ion,and a second phase of the corresponding zirconates appear at a low content of dopin... |
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| Keywords: | thermal barrier coatings rare-earth zirconate bivalent ions doping thermal conductivity |
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