| 氮化铝纳米线的高压同步辐射研究 |
| |
| 引用本文： | 沈龙海,崔启良,李雪飞.氮化铝纳米线的高压同步辐射研究[J].高压物理学报,2010,24(4). |
| |
| 作者姓名： | 沈龙海 崔启良 李雪飞 |
| |
| 作者单位： | 1. 沈阳理工大学理学院，辽宁沈阳 110159；2. 吉林大学超硬材料国家重点实验室，吉林长春 130012 |
| |
| 摘 要： | 利用金刚石对顶砧和同步辐射光源,对用电弧法制备的、具有纤锌矿结构的氮化铝(AlN)纳米线进行了最高压力达51.1 GPa的原位角散X射线衍射研究。结果表明:当压力上升至24.9 GPa时,纤锌矿结构的AlN纳米线开始向岩盐矿结构转变;当完全卸压后,最终的岩盐矿结构被保留下来;纤锌矿AlN纳米线的轴向比例c/a随压力增加而线性减小。AlN纳米线独特的线状结构决定了其区别于AlN微晶和AlN纳米晶的高压行为。
|
| 关 键 词： | 氮化铝纳米线 同步辐射 结构转变 体弹性模量 |
| 收稿时间： | 2009-07-22; |
Synchrotron Radiation X-Ray Diffraction Study of AlN Nanowires under High Pressures |
| |
| SHEN Long-Hai,CUI Qi-Liang,LI Xue-Fei.Synchrotron Radiation X-Ray Diffraction Study of AlN Nanowires under High Pressures[J].Chinese Journal of High Pressure Physics,2010,24(4). |
| |
| Authors: | SHEN Long-Hai CUI Qi-Liang LI Xue-Fei |
| |
| Institution: | 1. School of Science, Shenyang Ligong University, Shenyang 110159, China;2. National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
| |
| Abstract: | The high-pressure behavior of wurtzite AlN nanowires is studied up to 51.1 GPa by in situ angle dispersive X-ray diffraction using synchrotron radiation source and a diamond anvil cell. With increasing pressure up to 24.9 GPa, the wurtzite-to-rocksalt phase transition was observed. The rocksalt phase is quenched after a complete pressure release. The axial ratio c/a of the wurtzite AlN nanowires decreases linearly with increasing pressure. The unique wire-like structure in AlN nanowires results in the high pressure behavior being different from that of the bulk and nanocrystal AlN. |
| |
| Keywords: | AlN nanowires synchrotron X-ray diffraction structure transition bulk modulus |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《高压物理学报》浏览原始摘要信息 |
| 点击此处可从《高压物理学报》下载免费的PDF全文 |
