Raman scattering study of phase transition in Lu2O3–Ta2O5

The lutetium tantalate compounds obtained from Lu2O3–Ta2O5 with a molar ratio of 0.515 ： 0.485 were studied by Raman scattering and x-ray diffraction. The results of the room temperature Raman scattering indicate that the sample has a phase transition between 1830℃ and 1872℃, the polycrystalline is...

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Published in中国物理B：英文版 no. 9; pp. 553 - 556
Main Author 王小飞 邢雪 张庆礼 尤静林 伍俊 张德明 孙彧 孙敦陆 殷绍唐
Format Journal Article
LanguageEnglish
Published 01.09.2015
Subjects
Ta2O5
X射线衍射
拉曼散射
氧化镥
混合物
温度
相变
高温拉曼光谱
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/24/9/098104

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Summary:The lutetium tantalate compounds obtained from Lu2O3–Ta2O5 with a molar ratio of 0.515 ： 0.485 were studied by Raman scattering and x-ray diffraction. The results of the room temperature Raman scattering indicate that the sample has a phase transition between 1830℃ and 1872℃, the polycrystalline is a mixture of M-LuTaO4 and Lu3TaO7（F m3m）when it is prepared at 1830℃, and a mixture of M-LuTaO4（B112/b） and Lu3 Ta O7（Fm3^-m） when it is prepared at above 1872℃. The sample melts at a temperature of 2050℃. The phase transition of the sample prepared at 2050℃ was also investigated by the high-temperature Raman spectra, and the result indicates that no phase transition occurs between room temperature and 1400℃, which is consistent with the results from the x-ray diffraction.
Bibliography:The lutetium tantalate compounds obtained from Lu2O3–Ta2O5 with a molar ratio of 0.515 ： 0.485 were studied by Raman scattering and x-ray diffraction. The results of the room temperature Raman scattering indicate that the sample has a phase transition between 1830℃ and 1872℃, the polycrystalline is a mixture of M-LuTaO4 and Lu3TaO7（F m3m）when it is prepared at 1830℃, and a mixture of M-LuTaO4（B112/b） and Lu3 Ta O7（Fm3^-m） when it is prepared at above 1872℃. The sample melts at a temperature of 2050℃. The phase transition of the sample prepared at 2050℃ was also investigated by the high-temperature Raman spectra, and the result indicates that no phase transition occurs between room temperature and 1400℃, which is consistent with the results from the x-ray diffraction.
11-5639/O4
LuTaO4,phase transition,Raman scattering,x-ray diffraction
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/24/9/098104