OH^- absorption bands of LiNbO_3 with varying composition  

作　　者：陈洪建 师丽红 阎文博 陈贵锋 沈俊 李养贤 

机构地区：[1]School of Materials Science and Engineering,Hebei University of Technology [2]Tianjin Institute of Urban Construction

出　　处：《Chinese Physics B》2009年第6期2372-2376,共5页中国物理B（英文版）

基　　金：Project supported by Natural Science Foundation of Hebei Province of China (Grant No F2007000119);Scientific Research Foundation of Education Bureau of Hebei Province of China (Grant No 2008113);Technology Development Foundation of Higher Educational Institutions of Tianjin of China (Grant No 20070502);the Natural Science Foundation of Tianjin in 2009

摘　　要：This paper reports that OH^- absorption bands of lithium niobate crystal have been measured at room temperature, and the band shape depending on the crystal composition has been observed. The OH^- absorption bands are fitted with three Lorentzian peaks by varying position, halfwidth, and height. Nearly constant peak positions （3468, 3481 and 3490 cm^-1） are obtained for all samples. It shows that the height and area of the decomposed peaks vary with the Li composition in a complex way. However, the combinations of these fitting parameters show a linear dependence on the composition up to nearly 50 mol%, which is very useful for the composition determination in a wide range. The linear relationships between the parameter combinations and Li composition are also presented quantitatively. In addition, the explanations were given for the excellent composition linearity of parameter combinations.This paper reports that OH^- absorption bands of lithium niobate crystal have been measured at room temperature, and the band shape depending on the crystal composition has been observed. The OH^- absorption bands are fitted with three Lorentzian peaks by varying position, halfwidth, and height. Nearly constant peak positions （3468, 3481 and 3490 cm^-1） are obtained for all samples. It shows that the height and area of the decomposed peaks vary with the Li composition in a complex way. However, the combinations of these fitting parameters show a linear dependence on the composition up to nearly 50 mol%, which is very useful for the composition determination in a wide range. The linear relationships between the parameter combinations and Li composition are also presented quantitatively. In addition, the explanations were given for the excellent composition linearity of parameter combinations.

关 键 词：optical materials Fourier transform infrared heat treatment ADSORPTION 

分 类 号：O614.111[理学—无机化学]