SOLUTE TRANSPORT MODEL OF ACRT-B CRYSTAL GROWTH PROCESS
ACRT—B法晶体生长过程的传质模型

Based on the present knowledge of convective flow and solute transport during ACRT-B crystal growth process, a one-dimensional soIute transport modeI of ACRT-B cyStal grwthis presented. AnalyticaI results of axial solute distribution applicable to the initial transient region, the steady-state region and the final transient region are obtained. In comparison with the traditional Bridgman method- ACRT-B process with the same Bridgman parameters will decrease the axial compositional uniform region. On the premise of assuring the effect of ACRT-B process on promoting crystallinity and radial compositional uniformify efFective and applicable ways to decrease the loss of axial compositional uniform region are properly increasing growth rate, selecting possibly small maximum rotation rate or using the ampoule with a much larger aspect ratio L R-1