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Study on Flux Growth of KBBF Crystals in Rotary Temperature Field by Rotating Chamber Furnace

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


KBBF and RBBF are the only two deep-UV nonlinear optical crystals that can generate coherent radiation below 200 nm by direct second harmonic. The common technique used to grow these two kinds of crystals is spontaneous nucleation by flux method. In this paper, we modified the growth method by applying a rotating temperature field during the crystallization process. The rotary temperature field was realized by rotating the heating chamber while the crucible and crystal were immobilized. It enhances the mass and heat transport during a non-seeded growth process in the absence of convective flow. The inclusions enveloped in crystals were reduced and the growth rate of KBBF crystal was increased. By studying the mass and heat transfer within the melt and subsequently optimizing the growth parameters in rotating temperature field, we were able to obtain high quality KBBF crystals. The prospect of this new crystal growth method was evaluated.


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

Submitted: 2013-04-03 12:07
Revised:   2013-04-07 04:15