INFLUENCE OF SEED CRYSTAL DIMENSION ON CRYSTAL GROWTH FROM SOLUTION UNDER MICROGRAVITY
Zhu Zhen-he (朱振和)ab, Ge Pei-wen (葛培文)a, Xu Zheng-yi (许政一)a
a Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; Department of Physics, Central University for Nationalities, Beijing 100081, China
Abstract The influence of the dimension of seed crystal on the characteristics of crystal growth from solution under microgravity is studied. The dimensionless average velocity of fluid Vav, the dimensionless maximum velocity of fluid Vmax, the temperature distribution index $S_{\theta}$, the concentration distribution index $S_{\phi}$ and the dimensionless average growth rate of crystal $\overline{V}_{\rm cg}$ are calculated by only taking into account the variation of the solution density caused by the temperature change, that caused by the concentration change being neglected. In certain regions of the parameter (Ra, Pr, Sc and $\mu$) space, some scaling laws are generated: the scales of $S_{\phi}$ and $\overline{V}_{\rm cg}$ are given by power functions of $\mu$ with negative exponents. It is shown that the characteristics of crystal growth for small seed crystal are different from those for large seed crystal.
Received: 17 November 1999
Accepted manuscript online:
PACS:
81.10.Aj
(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
Zhu Zhen-he (朱振和), Ge Pei-wen (葛培文), Xu Zheng-yi (许政一) INFLUENCE OF SEED CRYSTAL DIMENSION ON CRYSTAL GROWTH FROM SOLUTION UNDER MICROGRAVITY 2000 Chinese Physics 9 321
Characteristics of urea under high pressure and high temperature Shuai Fang(房帅), Hong-An Ma(马红安), Long-Suo Guo(郭龙锁), Liang-Chao Chen(陈良超), Yao Wang(王遥), Lu-Yao Ding(丁路遥), Zheng-Hao Cai(蔡正浩), Jian Wang(王健), Xiao-Peng Jia(贾晓鹏). Chin. Phys. B, 2019, 28(9): 098101.
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
