光学学报, 2005, 25 (7): 949, 网络出版: 2006-05-22
不同退火气氛下γ-LiAlO2形貌和结构研究
Research of the Morphologies and Structure of γ-LiAlO2 Annealed in Various Atmospheres
光学材料 温度梯度法 铝酸锂 退火 表面结构 表面形貌 吸收光谱 optical materials temperature gradient technique lithium aluminate anneal surface structure surface morphology absorption spectrum
摘要
研究了温度梯度法生长的γ-LiAlO2晶体在1100 ℃下富Li气氛和空气中退火处理后的表面形貌、表面结构以及吸收光谱。发现γ-LiAlO2晶体的抛光面在1100 ℃空气中退火后变为粗糙面,X射线衍射(XRD)分析表明此粗糙面为单相的LiAl5O8。而γ-LiAlO2晶体的抛光面在1100 ℃富Li气氛中处理后几乎没有变化。同时对不同气氛下热处理的γ-LiAlO2晶体进行了光谱分析,确认了晶片中196 nm的吸收峰是由Li空位引起的。
Abstract
(001) γ-LiAlO2 plates grown by temperature gradient technique (TGT) have been annealed in Li-rich and O2 atmosphere at 1100 ℃/70 h. The surface structure, morphology and absorption spectra were investigated through scanning electron microscopy, X-ray diffraction, spectrophotometer at room temperature. Compared to the plate annealed in Li-rich atmosphere, the surface of the plate annealed in O2-atmosphere became coarse and grew Li-poor polycrystalline (LiAl5O8). With the all spectral analysis, it is confirmed that the 196 nm absorption peak is probably caused by Li vacancies in the plate.
邹军, 周圣明, 彭观良, 杨卫桥, 李抒智, 周国清, 徐军, 张荣. 不同退火气氛下γ-LiAlO2形貌和结构研究[J]. 光学学报, 2005, 25(7): 949. 邹军, 周圣明, 彭观良, 杨卫桥, 李抒智, 周国清, 徐军, 张荣. Research of the Morphologies and Structure of γ-LiAlO2 Annealed in Various Atmospheres[J]. Acta Optica Sinica, 2005, 25(7): 949.
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