Heat shield to control thermal gradients, melt convection, and interface shape during shouldering in Czochralski oxide growth

J. Carlos Rojo; Ernesto Diéguez; Jeffrey J. Derby

doi:10.1016/S0022-0248(98)01250-0

Heat shield to control thermal gradients, melt convection, and interface shape during shouldering in Czochralski oxide growth

J. Carlos Rojo, Ernesto Diéguez, Jeffrey J. Derby

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A modification of the Czochralski growth system consisting of a circular disk attached to the pulling rod has been used during the shouldering of Bi₁₂SiO₂₀ single crystals. Experimental results show significant changes to the melt-crystal interface shape and faceting behavior from the use of disks of different materials. A simple mathematical analysis of enclosure radiation provides a self-consistent explanation for the observed changes in terms of system thermal gradients and the intensity of melt convection.

Original language	English (US)
Pages (from-to)	329-334
Number of pages	6
Journal	Journal of Crystal Growth
Volume	200
Issue number	1-2
DOIs	https://doi.org/10.1016/S0022-0248(98)01250-0
State	Published - Apr 1 1999

Bibliographical note

Funding Information:
This work was supported in part by the Army High Performance Computing Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement DAAH04-95-2-0003/contract DAAH04-95-C-0008, the content of which does not necessarily reflect the position or policy of the government, and no official endorsement should be inferred. Additional computational resources were provided by the University of Minnesota Supercomputer Institute. The authors gratefully acknowledge Dr. P.S. Dutta, Dr. C. Marı́n and Dr. L. Arizmendi for discussion of the experimental results and F. Abella for technical assistance in the laboratory.

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abstract = "A modification of the Czochralski growth system consisting of a circular disk attached to the pulling rod has been used during the shouldering of Bi12SiO20 single crystals. Experimental results show significant changes to the melt-crystal interface shape and faceting behavior from the use of disks of different materials. A simple mathematical analysis of enclosure radiation provides a self-consistent explanation for the observed changes in terms of system thermal gradients and the intensity of melt convection.",

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Heat shield to control thermal gradients, melt convection, and interface shape during shouldering in Czochralski oxide growth

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