本文提供了在空间晶体生长观察装置上，实时观察记录了空间高温氧化物晶体生长过程的新方法．该装置具有自动光电调焦、多工位、自动图像记录等特点，通过设置不同的温控程序，利用该装置测定了高温熔体内的温度分布，同时对高温氧化物晶体材料界面形貌变化及其周围的熔体流动状态进行了分析，并首次观察到空间高温溶质的均匀扩散现象和空间高温溶液内均匀胞状结构的形成过程，最后对比空间和地面的实验结果，阐述重力对流和表面张力对流在微重力条件下对晶体生长的影响机制．
The space high temperature oxide crystal growth process was observed and recorded realtimely by means of the space high temperature in-situ
observation facility. This facility has a lot of prominent characteristics, such as automatically photo-focusing lens, multi-working position,
automatically recording image etc. The temperature distribution in high temperature melt was measured by setting different control-temperature
procedure, in the meantime, the boundary shape varying of high temperature oxide crystal and the fluid state of melt in its ambience were analysed,
it was the first time that the even diffuse phenomenon of high temperature solute and the complete cellulation formation in high temperature solution
in space were visualized. In the last, the space experimental results were compared with the ground experimental results under the same growth
condition of technology, for explaining the effect of gravitational convection and surface tension convection under micro-gravity conditions
on the crystal growth in space.
参考文献
| [1] | Jin W Q, Chen J Y, Li W S, et al. Ferroelectrics, 1993, 142: 13--18 2 Benard H. Rev. Gen. Sci. Pure Appl. 1900, 11: 1261--1265 3 Benard H. Ann. Chim. Phys., 1901, 23: 62--65 4 Chai A T, Zhang N. Proc. 3rd Microgravity Fluid Physics Conf., NASA Conference Publication-3338, 1996. 521--527 5 Rayleigh L. Phil. May., 1916, 32: 529--531 6 Block M J. Nature, 1956, 178: 650--652 |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%