Raman scattering study of phase transition in Lu2O3-Ta2O5

doi:10.1088/1674-1056/24/9/098104

Abstract 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 (Fm3m) when it is prepared at 1830 ℃, and a mixture of M-LuTaO₄ (B112/b) and Lu₃TaO₇ (Fm3m) 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.

Keywords: LuTaO₄ phase transition Raman scattering x-ray diffraction

Received: 03 February 2015
Revised: 12 March 2015
Accepted manuscript online:

PACS:	81.30.Dz	(Phase diagrams of other materials)
	87.64.kp	(Raman)
	42.70.-a	(Optical materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51172236, 51272254, 51102239, and 61205173) and the National Science Fund for Distinguished Young Scholars, China (Grant No. 61405206).

Corresponding Authors: Zhang Qing-Li
E-mail: zql@aiofm.ac.cn

Cite this article:

Wang Xiao-Fei (王小飞), Xing Xue (邢雪), Zhang Qing-Li (张庆礼), You Jing-Lin (尤静林), Wu Jun (伍俊), Zhang De-Ming (张德明), Sun Yu (孙彧), Sun Dun-Lu (孙敦陆), Yin Shao-Tang (殷绍唐) Raman scattering study of phase transition in Lu₂O₃-Ta₂O₅ 2015 Chin. Phys. B 24 098104

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Raman scattering study of phase transition in Lu2O3-Ta2O5

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Raman scattering study of phase transition in Lu₂O₃-Ta₂O₅