高温氧化物熔体中表面张力对流效应研究实验  

Experiments on Surface Tension Driven Flow in High Temperature Oxide Melt

作　　者：刘照华[1] 金蔚青[1] 潘志雷[1] 程宁[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》1998年第1期113-116,共4页Journal of Inorganic Materials

摘　　要：利用高温实时光学观察方法，实时地观察了高温氧化物熔体中的表面张力对流效应．稳态的热毛细对流流线呈轴对称形式，非稳态的热毛细涡流运动伴随熔液温度呈周期性变化，同时还观察到另一种由熔体自由表面的弯月面曲率的变化引起的非稳态的热毛细对流现象．最后测定了相对熔液温度下非稳态热毛细对流的振荡频率．Surface tension driven flow in high temperature oxide melt was visualized by means of the already proved method of high temperature in situ optical obserx.ation. The streamlines of the steady thermocapillary convection were marked in the form of an axially symmetric pattern. The oscillation motion of thermocapillary vortex was observed accompanied by synchronous temperature oscillations. Another type of oscillation thermocapillary convection was also observed mainly caused by the variation of the curvature of meniscus of the melt free surface. Finally the oscillatory frequency of the convection against the temperature of the melt was meajsured.

关 键 词：表面张力对流 氧化物熔体 高温 晶体生长 

分 类 号：O78[理学—晶体学]