Heat transfer and fluid flow in floating-zone crystal growth with a mostly covered melt surface
Journal
International Journal of Heat and Mass Transfer
Journal Volume
35
Journal Issue
2
Pages
433-442
Date Issued
1992
Author(s)
Abstract
Computer simulation was conducted to study a modified floating-zone crystal growth process, in which the melt surface is mostly covered with a heated ring. The growth of 6 mm diameter single crystals of NaNO3 was considered, and the effects of the following parameters were studied: (1) temperature of the ring, (2) growth rate, (3) surface tension-temperature coefficient of the melt, (4) thermal expansion coefficient of the melt, and (5) gravity. It was demonstrated that thermocapillary convection in the melt zone is reduced significantly in this modified process. The model was checked against the measured lengths of the meniscus near the growth front and axial temperature distribution in a growing crystal, and the agreement was good. © 1992.
Type
journal article