High‐Temperature Phase Relations in the Lu2O3–Ta2O5 System
High‐Temperature Phase Relations in the Lu2O3–Ta2O5 System
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DOI：
10.1111/jace.13977
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发表时间：
2016-03
影响因子：
3.9
通讯作者：
Xue Xing;Xiaofei Wang;Qingli Zhang;Guihua Sun;C. Shi;Wenpeng Liu;D. Sun;S. Yin
中科院分区：
文献类型：
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作者：
Xue Xing;Xiaofei Wang;Qingli Zhang;Guihua Sun;C. Shi;Wenpeng Liu;D. Sun;S. Yin
在1350°C ~ 2058°C温度范围内，采用固相反应法制备了组成为25- 60mol%Ta2O5的Lu 2 O3-Ta 2 O 5体系化合物，并用X射线衍射（XRD）研究了其相转变。观察到立方Lu_3TaO_7、M′-LuTaO_4、M-LuTaO_4、O-Ta_2 O_5和T-Ta_2 O_5。当Ta_2O_5含量为30- 52mol%时，在1770°C附近有一个从M′到M-LuTaO_4的不可逆相变;当Ta_2O_5含量大于52mol%且≤ 60mol%时，在1685°C附近有一个从T-Ta_2 O_5到O-Ta_2 O_5的不可逆相变。绘制了0- 100mol%Ta_2O_5范围内Lu_2O_3-Ta_2O_5系统的相图。这些结果有助于解释Lu_2O_3-Ta_2O_5系统的相变过程，并有助于设计LuTaO_4单晶或陶瓷闪烁体的制备工艺，使其在核医学和高能物理领域得到应用。
The compounds formed from the Lu2O3–Ta2O5 system in the composition range 25–60 mol% Ta2O5 were prepared by solid-state reaction from 1350°C to 2058°C, and the phase transitions were investigated by X-ray diffraction (XRD). Cubic Lu3TaO7, M′-LuTaO4, M-LuTaO4, O-Ta2O5, and T-Ta2O5 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% Ta2O5, and another phase transition from T-Ta2O5 to O-Ta2O5 at about 1685°C when the ratio of Ta2O5 is >52 and ≤60 mol%. A phase diagram of the Lu2O3–Ta2O5 system in the range 0–100 mol% Ta2O5 was constructed. These results are helpful to explain the phase transition of Lu2O3–Ta2O5 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.