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Defect comparison and analysis of flux and hydrothermally grown KBe2BO3F2 crystals

Lijuan Liu 1Tao Xu 1,2Xiaolong Wang 1,2Xiaoyang Wang 1Chuangtian Chen 1

1. Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2. Graduate university of Chinese Academy of Sciences, Beijing 100049, China


 It is very interesting that the KBe2BO3F2 (KBBF) crystals are grown both by flux and hydrothermal method. In this paper, defects of KBBF crystals grown by these two methods were examined by the optical microscope. The main defects of flux grown KBBF crystals were etch pits and twin boundaries, which were also observed in the hydrothermally grown ones. The composition and morphologies of these defects were analyzed. Some formation mechanisms and the methods of eliminating these defects were also discussed. While the main defect for the hydrothermally grown KBBF is inhomogeneous with two structures R32 and R-3c mixing that is never discovered in the flux grown ones. It is very difficult to overcome up to date. Up to now the high power sixth harmonic generation of Nd:YAG laser at 177.3nm have all been produced by the flux grown KBBF crystals and we suspect that the hydrothermal method is not practical for KBBF crystal growth and applications.   


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Presentation: Poster at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, Topical Session 6, by Lijuan Liu
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17

Submitted: 2013-03-29 11:12
Revised:   2013-04-03 06:05