Synthesis and in situ high pressure Raman spectroscopy study of AlN dendritic crystal
Synthesis and in situ high pressure Raman spectroscopy study of AlN dendritic crystal
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AlN枝晶的合成及原位高压拉曼光谱研究
DOI：
10.1016/j.materresbull.2013.05.002
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发表时间：
2013-09
影响因子：
5.4
通讯作者：
Li, Ming
中科院分区：
文献类型：
--
作者：
Li, Xuefei;Kong, Lingnan;Shen, Longhai;Yang, Jinghai;Gao, Ming;Hu, Tingjing;Wu, Xingtong;Li, Ming
采用直流电弧放电法合成了AlN枝晶。X射线衍射（XRD）分析表明，样品为六方AlN，且沿沿着a轴方向择优生长。扫描电子显微镜（SEM）和透射电子显微镜（TEM）图像表明，产物主要由微米级AlN树枝状晶体组成。采用金刚石对顶砧装置，在室温下，在常压至32.97GPa的压力范围内，对AlN枝晶进行了原位高压拉曼光谱测量。根据拉曼散射结果，在20.73GPa附近出现了一个新的拉曼信号，证实了纤锌矿到岩盐的相变。在20.73GPa以上，观察到了一个新的拉曼信号，这是由于在岩盐相中的无序激活的拉曼散射。此外，还对AlN枝晶的压力系数、相变判据和模格吕奈森参数等可能不同于其它AlN的参数进行了详细的讨论。
AlN dendritic crystal was synthesized by the direct current arc discharge apparatus. X-ray diffraction (XRD) patterns indicated that the sample is hexagonal AlN and preferentially grown along the a-axis direction. Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) images reveal that the product mainly consists of micron AlN dendritic crystal. In situ high pressure Raman spectra of AlN dendritic crystal has been measured in the pressure ranged from ambient pressure to 32.97GPa at room temperature by using diamond anvil cell. According to the Raman scattering results, the phase transition from the wurtzite to rock salt was found at about 20.73GPa by the appearance of a new Raman signal. Above 20.73GPa, a new Raman signal due to disorder-activated Raman scattering in the rock salt phase was observed. In addition, the pressure coefficients, phase transition criterion, and mode Grüneisen parameters of AlN dendritic crystal, which could be different from that of other AlN, are carefully discussed.
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影响因子：
3.5
作者：
Pengfei Wang;Zh.H. Li;Y. M. Zhu
通讯作者：
Pengfei Wang;Zh.H. Li;Y. M. Zhu
DOI：
10.1021/jp711530q
发表时间：
2008-01
期刊：
The journal of physical chemistry. B
影响因子：
--
作者：
G. Ouyang;Chang Q. Sun;Weiguang Zhu
通讯作者：
G. Ouyang;Chang Q. Sun;Weiguang Zhu
影响因子：
5.2
作者：
Kim, Hui-sik;Chae, Jung-min;Lee, Sung-min
通讯作者：
Lee, Sung-min
影响因子：
1.8
作者：
Kuball, M;Hayes, JM;Dunstan, DJ
通讯作者：
Dunstan, DJ
影响因子：
13.1
作者：
Yong-gai Hou;G. Qiao;Yong Shang;Wen-jun Zou;F. Xiao;B. Liao
通讯作者：
Yong-gai Hou;G. Qiao;Yong Shang;Wen-jun Zou;F. Xiao;B. Liao