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利用高温熔体实时观察装置观察和研究了Ｂｉ１２ＳｉＯ２０熔体中表面张力对流从稳态向振荡态的转变过程；稳态过程中的对流图样变化；可能与对流转变有关的两个对流区域的交叉；振荡态对流的分叉现象．
The observation of the transition of surface tension convection from steady-state to oscillatory state in Bi12SiO20 melt, the change of convection pattern in steady-state process, the cross-over of two convectional regions which may be related to convective transition, Bifurcation of Oscillatory State Convection.