| 含12mol%铈的四方氧化锆多晶的变温喇曼散射研究 |
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| 引用本文： | 程光煦,张杏奎.含12mol%铈的四方氧化锆多晶的变温喇曼散射研究[J].物理学报,1990,39(8):162-168. |
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| 作者姓名： | 程光煦 张杏奎 |
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| 作者单位： | 南京大学现代分析中心及固体微结构实验室,南京,210008 |
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| 摘 要： | 对含12mol％铈的四方氧化锆多晶耐高温材料从17—505K温度范围进行了50—800cm-1的喇曼散射研究,同时还实测了线膨胀系数随温度的变化。降温时,在165±1K观察到了类四方相向类单斜相的转变,而升温时,在450土2K发生了与之相反的转变。为了探讨该转变的原因,对布里渊区声子凝聚和可能引起的相转变做了较仔细的说明。
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| 关 键 词： | 铈 氧化锆 喇曼散射 耐高温材料 |
| 收稿时间： | 9/4/1989 12:00:00 AM |
VARYING TEMPERATURE RAMAN SCATTERING STUDIES OF 12 mol% Ce TETRAGONAL ZIRCONIA POLYCRYSTAL |
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| CHENG GUANG-XU and ZHANG XING-KUI.VARYING TEMPERATURE RAMAN SCATTERING STUDIES OF 12 mol% Ce TETRAGONAL ZIRCONIA POLYCRYSTAL[J].Acta Physica Sinica,1990,39(8):162-168. |
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| Authors: | CHENG GUANG-XU and ZHANG XING-KUI |
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| Abstract: | Raman scattering studies have been carried out on 12 mol% Ce-Tetragonal Zirconia Poly-crystal over 50-800cm-1, and a range of temperature 17-505K, a phase transition was observed from the tetragonal-like to monoclinic-like phase at approximately 165±1K when the temperature was lowering. The reverse transition occurred at approximately 450±2K when the temperature was raising.In order to study the reason of this transition, the condensation of the phonons in Brillouin zone and possible phase transition have been carefully discussed. |
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