Effect of surface tension-driven flow on BaB2O4 crystal growth from high temperature melt-solution by Xiuhong Pan, Weiqing Jin, Yan Liu, and Fei Ai

Crystal Research and Technology

Cryst. Res. Technol. 43, 152 (2008) - Abstract -

Effect of surface tension-driven flow on BaB₂O₄ crystal growth from high temperature melt-solution

Xiuhong Pan, Weiqing Jin, Yan Liu, and Fei Ai

Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China

Keywords	crystal growth, surface tension-driven convection, boundary layer, BaB₂O₄
PACS	81.10.Aj, 47.55.pf, 47.15.Cb
DOI	10.1002/crat.200711045

The surface tension driven-flow in BaB₂O₄ (BBO) melt-solution is visualized by differential interference microscope coupled with Schlieren technique, and the streamline of the steady thermocapillary convection is found to be in form of an axially symmetric pattern. Based on the observation of BBO crystal rotation caused by the convective vortex, the widths of interfacial concentration, heat and momentum boundary layer are calculated. The effect of thermocapillary convection on boundary layer thickness is also investigated. Results show that the width of boundary layer decreases linearly with the increasing of dimensionless Marangoni number.

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