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Raman scattering study of phase transition in Lu_2O_3–Ta_2O_5

Raman scattering study of phase transition in Lu_2O_3–Ta_2O_5
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摘要 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. 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.
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第9期553-556,共4页 中国物理B(英文版)
基金 Project supported by the National Natural Science Foundation of China(Grant Nos.51172236,51272254,51102239,and 61205173) the National Science Fund for Distinguished Young Scholars,China(Grant No.61405206)
关键词 LuTaO4 phase transition Raman scattering x-ray diffraction LuTaO4,phase transition,Raman scattering,x-ray diffraction
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