High-Pressure and High-Temperature Behaviour of Gallium Oxide
MA Yan-Mei1,3, CHEN Hai-Yong1, YANG Kai-Feng1, LI Min1,CUI Qi-Liang1, LIU Jing2, ZOU Guang-Tian1
1National Laboratory of Superhard Materials, Jilin University, Changchun 1300122Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 1000493Department of Agronomy, Jilin University, Changchun 130062
High-Pressure and High-Temperature Behaviour of Gallium Oxide
MA Yan-Mei1,3;CHEN Hai-Yong1;YANG Kai-Feng1;LI Min1,CUI Qi-Liang1;LIU Jing2;ZOU Guang-Tian1
1National Laboratory of Superhard Materials, Jilin University, Changchun 1300122Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 1000493Department of Agronomy, Jilin University, Changchun 130062
摘要High-temperature and high-pressure behaviours of β-Ga2O3 powder are studied by energy-dispersive x-ray diffraction in a diamond anvil cell (DAC). It is found that the phase transition from the monoclinic β-Ga2O3 to the trigonal α-Ga2O3 occurs at around 19.2GPa under cold compression. By heating the powder to 2000K at 30GPa, we confirm that α-Ga2O3 is the most stable structure at the high pressure. Furthermore, the structural transition from β-Ga2O3 to α-Ga2O3 is irreversible. After laser heating, the recrystallized Ga2O3 has a preferable (012) orientation. This interesting behaviour is also discussed.
Abstract：High-temperature and high-pressure behaviours of β-Ga2O3 powder are studied by energy-dispersive x-ray diffraction in a diamond anvil cell (DAC). It is found that the phase transition from the monoclinic β-Ga2O3 to the trigonal α-Ga2O3 occurs at around 19.2GPa under cold compression. By heating the powder to 2000K at 30GPa, we confirm that α-Ga2O3 is the most stable structure at the high pressure. Furthermore, the structural transition from β-Ga2O3 to α-Ga2O3 is irreversible. After laser heating, the recrystallized Ga2O3 has a preferable (012) orientation. This interesting behaviour is also discussed.
MA Yan-Mei;CHEN Hai-Yong;YANG Kai-Feng;LI Min;CUI Qi-Liang;LIU Jing;ZOU Guang-Tian. High-Pressure and High-Temperature Behaviour of Gallium Oxide[J]. 中国物理快报, 2008, 25(5): 1603-1605.
MA Yan-Mei, CHEN Hai-Yong, YANG Kai-Feng, LI Min, CUI Qi-Liang, LIU Jing, ZOU Guang-Tian. High-Pressure and High-Temperature Behaviour of Gallium Oxide. Chin. Phys. Lett., 2008, 25(5): 1603-1605.
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2008, Vol. 25 
