High‐Temperature Phase Relations in the Lu2O3–Ta2O5 System. Issue 3 (30th October 2015)

• Record Type: Journal Article
• Authors: Xing, Xue; Wang, Xiaofei; Zhang, Qingli; Sun, Guihua; Shi, Chaoshu; Liu, Wenpeng; Sun, Dunlu; Yin, Shaotang
• Editors: Vanderah, T. A.
• Is Part Of: Journal of the American Ceramic Society. Volume 99:Issue 3(2016)
• Page Start: 1042
• Page End: 1046
• Publication Date: 2015-10-30
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.13977
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : The compounds formed from the Lu2 O3 –Ta2 O5 system in the composition range 25–60 mol% Ta2 O5 were prepared by solid‐state reaction from 1350°C to 2058°C, and the phase transitions were investigated by X‐ray diffraction (XRD). Cubic Lu3 TaO7, M′‐LuTaO4, M‐LuTaO4, O‐Ta2 O5, and T‐Ta2 O5 are observed. With the temperature increase, there is an irreversible phase transition from M′ to M‐LuTaO4 near 1770°C in the composition of 30–52 mol% Ta2 O5, and another phase transition from T‐Ta2 O5 to O‐Ta2 O5 at about 1685°C when the ratio of Ta2 O5 is >52 and ≤60 mol%. A phase diagram of the Lu2 O3 –Ta2 O5 system in the range 0–100 mol% Ta2 O5 was constructed. These results are helpful to explain the phase transition of Lu2 O3 –Ta2 O5 system and design the preparation technique of LuTaO4 single crystal or ceramic scintillator, which may be applied in the fields of nuclear medicine and high‐energy physics.