【作者】 张帆； 袁欣； 沈德忠； 沈光球； 王晓青；

【Author】 ZHANG Fan1,YUAN Xin1,SHEN De-zhong1,2, SHEN Guang-qiu1, WANG Xiao-qing1 (1.Chemistry Department,Tsinghua University,Beijing 100084,China; 2.Research Institute of Synthetic Crystal,Beijing 100018,China )

【机构】 清华大学化学系；

【Abstract】 Cesium lithium borate (CLBO) is a new nonlinear optical crystal with excellent properties of laser frequency conversion to UV wavelength region.However CLBO single crystals tend to crack at room temperature in an ambient air atmosphere, which has limited their use in device applications. In this paper, polished surfaces of CLBO crystal were etched in glycerol and/or water, and the etching patterns of different surfaces were observed and contrasted. Through comparison of the etching patterns of CLBO crystals immerged in pure glycerol and pure water, it was proved that CLBO crystals crack under chemical attack by water molecules from the (100) and (010) crystallographic planes. By the XRD analysis, the deliquescence products are Cs2B10O16·8H2O, α-Li4B2O5 and H3BO3. The cracking evolution of CLBO crystal immerged in pure water was exhibited and discussed finally.更多还原