Chin. Phys. Lett.  2008, Vol. 25 Issue (5): 1603-1605    DOI:
Original Articles |
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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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.
Keywords: 07.35.+k      61.10.-i      91.60.Hg     
Received: 03 January 2008      Published: 29 April 2008
PACS:  07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells)  
  61.10.-i  
  91.60.Hg (Phase changes)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I5/01603
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MA Yan-Mei
CHEN Hai-Yong
YANG Kai-Feng
LI Min
CUI Qi-Liang
LIU Jing
ZOU Guang-Tian
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