| β-BaB2O4晶体高压相变的X光衍射研究 |
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| 引用本文： | 顾惠成,陈良辰,李凤英,车荣钲,陈红,王积方,林远坤,蓝国祥.β-BaB2O4晶体高压相变的X光衍射研究[J].高压物理学报,1995,9(1). |
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| 作者姓名： | 顾惠成 陈良辰 李凤英 车荣钲 陈红 王积方 林远坤 蓝国祥 |
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| 作者单位： | 中国科学院物理研究所，南开大学物理系 |
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| 摘 要： | 我们用金刚石压砧装置（DAC）高压X射线粉末衍射照相方法，研究了β-BaB2O4晶体的相变。压力从0.1 MPa逐步加至17.6 GPa，发现BBO由室温下的六方相经历了若干次相变后，当压力加至11.5 GPa时，转变为无定形相。在11.5 GPa压力前的相变是可逆的，一旦进入无定形相，则相变是不可逆的。
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| 关 键 词： | 偏硼酸钡（简称β-BBO） 压致相变 X光衍射 金刚石压砧装置 |
| 收稿时间： | 1993-03-19; |
A Pressure-Induced Phase Transition Study of β-BaB2O4 Crystal by X-Ray Diffraction |
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| Gu Huicheng,Chen Liangchen,Li Fengying,Che Rongzheng,Chen Hong,Wang Jifang,Lin Yuankun,Lan Guoxiang.A Pressure-Induced Phase Transition Study of β-BaB2O4 Crystal by X-Ray Diffraction[J].Chinese Journal of High Pressure Physics,1995,9(1). |
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| Authors: | Gu Huicheng Chen Liangchen Li Fengying Che Rongzheng Chen Hong Wang Jifang Lin Yuankun Lan Guoxiang |
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| Institution: | 1. Institute of Physics, Academia Sinica, Beijing 100080, China;2. Department of Physics, Nankai University, Tianjin 30007, China |
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| Abstract: | Phase transitions of β-BaB2O4 crystal have been studied by using X-ray powder diffraction technique with a diamond anvil cell (DAC) at high pressure up to 17.6 GPa. According to the X-ray diffraction results, β-BaB2O4 crystal undergoes three pressure-induced phase transitions neat 2.2 GPa, 5.3 GPa, 11.5 GPa, respectively. The phase transitions are reversible below 11.5 GPa. β-BaB2O4 becomes amorphous and the phase transition is irreversible above 11.5 GPa. |
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| Keywords: | β-BBO barium metaborate (β-BBO pressure-induced phase transition X-ray diffraction diamond anvil cell |
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