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《Journal of Synthetic Crystals》 2009-01
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Study on the Hygroscopic Mechanism and Moisture-Proof Protection of CsB_3O_5 Crystal

LU Lu1,2,WU Yi-cheng1,FAN Fei-di1,ZHANG Guo-chun1,FU Pei-zhen1(1.Beijing Center for Crystal Research and Development,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;2.Graduated University of Chinese Academy of Sciences,Beijing 100039,China)  
Nonlinear optical crystal CsB3O5(CBO)has shown superior efficiency in THG of Nd:YAG 1064 nm laser.However,CBO crystal is hygroscopic at room temperature and in air atmosphere,which has limited its use in device applications.In this paper,different crystallographic surfaces of CBO crystal were studied by chemical erosion method.Through comparison of the etching patterns of CBO crystal and crystal structure along different directions,it was proved that there are a lot of channels in the(010) plane,from which the water molecule can easily penetrate into CBO crystal.The hygroscopic deterioration problem was solved by using anti-reflective coatings and moisture-proof films.
【Fund】: 国家高技术研究发展计划(No.2007AA03Z445);; 国家自然科学基金项目(No.60378026)
【CateGory Index】: O614.115
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