摘要
在空间晶体生长实时观察装置上,利用熔液中形成的铌酸钾微晶作示踪粒子,首次在空间高温氧化物熔液内,实时观察和记录了空间表面张力对流效应。利用测量的结果计算了熔体内空间表面张力对流的速度场,并与地面表面张力对流的速度场进行了对比,理论计算与实验结果基本吻合。探讨了空间均匀分布铌酸钾微晶的形成机理。结果表明:表面张力对流在空间晶体生长过程中起主要作用,是形成均匀分布胞状晶体的主要机理。
The space surface tension convection was observed in high temperature oxide solution by using space high temperature situ observation facility and the traced particles of microcrystal KNbO3 . The velocity field of the space surface tension convection was theoretically calculated with the detected experimental data in the solution and compared with that of the ground surface tension convection. The theoretical data were found in good agreement with the experimental results. The mechanism of formation of uniformly distributed microcrystal KNbO3 was analyzed and the result show that the surface tension convection plays a main role in the space crystal growth and the formation of uniformly distributed cellulation.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2002年第6期725-730,共6页
Journal of The Chinese Ceramic Society
基金
"九五"攀登计划资助项目(攀95-预-34)
国家自然科学基金资助项目(59832080)。
