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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 |
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| Cite this article: |
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MA Yan-Mei, CHEN Hai-Yong, YANG Kai-Feng et al 2008 Chin. Phys. Lett. 25 1603-1605 |
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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.
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| Keywords:
07.35.+k
61.10.-i
91.60.Hg
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Received: 03 January 2008
Published: 29 April 2008
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