OH-1 absorption bands of LiNbO3 with varying composition |
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Authors: | Chen Hong-Jian Shi Li-Hong Yan Wen-Bo Chen Gui-Feng Shen Jun and Li Yang-Xian |
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Institution: | School of Materials Science and Engineering,
Hebei
University of Technology, Tianjin 300130, China; Tianjin Institute of Urban Construction, Tianjin
300384, China |
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Abstract: | This paper reports that OH-1 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-1 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. |
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Keywords: | optical materials Fourier
transform infrared heat treatment adsorption |
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