| 氧化镓的同步辐射研究 |
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| 引用本文： | 崔启良,涂宝招,潘跃武,王成新,高春晓,张剑,刘景,邹广田.氧化镓的同步辐射研究[J].高压物理学报,2002,16(2):81-84. |
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| 作者姓名： | 崔启良 涂宝招 潘跃武 王成新 高春晓 张剑 刘景 邹广田 |
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| 作者单位： | 1. 吉林大学超硬材料国家重点实验室,吉林长春,130023
2. 中国科学院高能物理研究所,北京,100039 |
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| 基金项目： | 国家自然科学基金(50072005) |
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| 摘 要： | 利用金刚石对顶砧（DAC）高压装置产生高压，使用体积比为16∶3∶1的甲醇、乙醇和水混合液作为传压介质，通过原位高压同步辐射技术对氧化镓的高压行为进行了研究（0～42.5 GPa）。实验发现在室温下13.3 GPa压力附近，单斜结构的氧化镓发生了结构相变，变成三角结构。相变后镓离子由原来同时位于由氧离子围成的四面体和八面体的中心位置变成只位于八面体的中心位置。卸压后的X射线衍射谱表明，氧化镓又恢复为单斜结构，该相变为可逆相变。
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| 关 键 词： | 氧化镓 同步辐射 高压相变 DAC |
| 文章编号： | 1000-5773(2002)02-0081-04 |
| 收稿时间： | 2002-01-28; |
| 修稿时间： | 2002年1月28日 |
SYNCHROTRON RADIATION DIFFRACTION OF GALLIUM OXIDE UNDER HIGH PRESSURE |
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| CUI Qi-Liang,TU Bao-Zhao,PAN Yue-Wu,WANG Cheng-Xin,GAO Chun-Xiao,ZHANG Jian,LIU Jing,ZOU Guang-Tian.SYNCHROTRON RADIATION DIFFRACTION OF GALLIUM OXIDE UNDER HIGH PRESSURE[J].Chinese Journal of High Pressure Physics,2002,16(2):81-84. |
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| Authors: | CUI Qi-Liang TU Bao-Zhao PAN Yue-Wu WANG Cheng-Xin GAO Chun-Xiao ZHANG Jian LIU Jing ZOU Guang-Tian |
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| Institution: | 1. National Laboratory of Superhard Materials, Jilin University, Changchun 130023, China;2. Institute of High Energy, Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | The in-situ synchrotron radiation diffraction of gallium oxide under high pressure has been studied in the range of 0～42.5 GPa with diamond anvil cell (DAC), using methanol-ethanol-water (16∶3∶1) mixture as transmission medium. We have found that under room temperature, the monoclinic gallium oxide turns into a rhombohedral one under 13.3 GPa. After the phase changs, the Ga ions are only at the centers of the octahedrons instead of their original locations which are at both the centers of the octahedrons and the tetrahedrons. When the pressure goes back to ambient pressure, the sample turns back to monoclinic structure. |
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| Keywords: | gallium oxide synchrotron radiation high pressure phase transition DAC |
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