Nd∶Y_3Al_5O_(12)单晶及纳米粉体的Raman光谱分析  

Raman Spectra Analysis of Nd∶YAG Single Crystal and Its Nano-Powder

作　　者：苏静[1] 张庆礼[2] 殷绍唐[2] 孙敦陆[2] 邵淑芳[2] 

机构地区：[1]南京信息工程大学数理学院,江苏南京210044 [2]中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2009年第6期1577-1580,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10804053;60478025);南京信息工程大学校科研基金项目资助

摘　　要：测量了YAG(Y3Al5O12)/Nd∶YAG单晶、Nd∶YAG前驱物及其在不同温度下煅烧获得粉体的拉曼光谱,对谱峰的振动模式进行了指认,对结果进行了分析。Nd∶YAG前驱物在煅烧时,有一个由非晶态向晶态的转化过程;700℃下烧结前驱物获得非晶态产物的结构中含有AlO4四面体结构;随着煅烧温度的升高,拉曼光谱的变化主要表现在两个方面:一是谱峰半高宽(FWHM)减小,谱峰强度增大;二是一些拉曼光谱谱峰发生了频移,这是纳米多晶粉体的界面组元的有序度提高所致。另外,800℃下煅烧获得的Nd∶YAG纳米粉体的晶格振动模式与Nd∶YAG晶体的晶格振动模式存在差异,这是纳米多晶粉体的界面组元的贡献所致。In the present paper, the authors measured the Raman spectra of YAG/Nd ： YAG single crystal, Nd ： YAG precursor and the powder sintered at different temperatures. The bands of these Raman spectra were assigned and analyzed. The results show that there is a structure transformation process in the course of sintering Nd ： YAG precursor. The powder sintered at 700 ℃ was amorphous and it is of AlO4 tetrahedron structure. With the increase in sintering temperatures, the Raman spectra varied mainly in two respects. One is the decrease in FWHM with the increase in the bands intensity; the other is the bands shift. These should be due to the increase in the order degree of the ihterfaee component. Additionally, the difference in the lattice vibration modes between the powders sintered at 800 ℃ and the Nd ： YAG single crystal powder was caused by the contribution of the interface component.

关 键 词：Nd∶YAG 纳米粉体 RAMAN光谱 

分 类 号：O657.3[理学—分析化学]