The Structure and Liquid Flow Effect of Melt during NaCl Crystal Growth

• Published in: Crystal research and technology (1979) 2020-07, Vol.55 (7), p.n/a
• Main Authors: Li, Yongtao, Li, Yongju, Yang, Zhenxiao, Zhang, Xuejian, Zeng, Fanming, Li, Chun, Lin, Hai, Su, Zhongmin, Mahadevan, Chelliah Kamalakshiammal, Liu, Jinghe
• Format: Article
• Language: English
• Subjects: alkali halide; hydrodynamic equation; NaCl melt; quasi‐lattice model; solid–liquid interface
• ISSN: 0232-1300; 1521-4079
• DOI: 10.1002/crat.201900229

The quasi‐lattice model of NaCl melt is proposed by the ion movement characteristics, melt structure, and radial distribution function of ions, which is composed of regular and irregular regions. These regions are connected by an irregular interface with a thickness of several sublayers, and the ions on the interface are continuously and rapidly transferred. The mixed transmission kinetic equation of NaCl melt is analyzed theoretically by using the heat transfer equation and hydrodynamic equation. The liquid flow effect of NaCl melt and the temperature distribution in crystal are analyzed according to the numerical results. It is found that the shape of a solid–liquid interface will change with the rotation rate or diameter increase. The related properties of the NaCl melt are calculated. These studies of the NaCl melt provide theoretical support to a further study on crystal growth, other alkali halide, and alkaline earth metal halide melt. NaCl crystal growth model consists of melt and crystal. From the model, the mixed transmission kinetic equation of NaCl melt is analyzed theoretically by using the heat transfer equation. According to the calculation results, the streamline of the melt and the temperature profile of the crystal under the natural and forced convection is obtained.