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Title: On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace

Abstract

The CrysMAS code of the Crystal Growth Laboratory, Fraunhofer IISB, is applied to reveal conditions occurring in electrodynamic gradient freeze furnaces during the growth of cadmium zinc telluride crystals. Of particular interest are heat transfer and growth conditions associated with crucibles of different design, one constructed of graphite and the other of pyrolytic boron nitride (PBN). Under identical furnace set-point schedules, the PBN system exhibits very different heat transfer through the cone region of the crucible, resulting in steeper axial thermal profiles and convex solid-interface shapes (rather than the concave shapes computed for the graphite crucible). Both systems exhibit a concave interface during growth through the cylindrical part of the crucible; however, the axial thermal profile through the contents of the graphite crucible is considerably more offset from the set-point profile of the furnace due to the large axial flows of heat through the crucible walls. These conditions argue for advantage to the PBN system; however, comparatively larger radial gradients in the PBN system could lead to higher dislocation levels.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
983429
Report Number(s):
PNNL-SA-67116
Journal ID: ISSN 0022-0248; JCRGAE; NN2001000; TRN: US201014%%201
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Crystal Growth, 311(8):2327-2335; Journal Volume: 311; Journal Issue: 8
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CADMIUM TELLURIDES; ZINC TELLURIDES; CRYSTAL GROWTH; CRUCIBLES; DESIGN; HEAT TRANSFER; GRAPHITE; BORON NITRIDES; MATERIALS TESTING

Citation Formats

Gasperino, David, Bliss, Mary, Jones, Kelly A., Lynn, Kelvin G., and Derby, Jeffrey. On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace. United States: N. p., 2009. Web. doi:10.1016/j.jcrysgro.2009.01.141.
Gasperino, David, Bliss, Mary, Jones, Kelly A., Lynn, Kelvin G., & Derby, Jeffrey. On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace. United States. doi:10.1016/j.jcrysgro.2009.01.141.
Gasperino, David, Bliss, Mary, Jones, Kelly A., Lynn, Kelvin G., and Derby, Jeffrey. Sun . "On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace". United States. doi:10.1016/j.jcrysgro.2009.01.141.
@article{osti_983429,
title = {On crucible effects during the growth of cadmium zinc telluride in an electrodynamic gradient freeze furnace},
author = {Gasperino, David and Bliss, Mary and Jones, Kelly A. and Lynn, Kelvin G. and Derby, Jeffrey},
abstractNote = {The CrysMAS code of the Crystal Growth Laboratory, Fraunhofer IISB, is applied to reveal conditions occurring in electrodynamic gradient freeze furnaces during the growth of cadmium zinc telluride crystals. Of particular interest are heat transfer and growth conditions associated with crucibles of different design, one constructed of graphite and the other of pyrolytic boron nitride (PBN). Under identical furnace set-point schedules, the PBN system exhibits very different heat transfer through the cone region of the crucible, resulting in steeper axial thermal profiles and convex solid-interface shapes (rather than the concave shapes computed for the graphite crucible). Both systems exhibit a concave interface during growth through the cylindrical part of the crucible; however, the axial thermal profile through the contents of the graphite crucible is considerably more offset from the set-point profile of the furnace due to the large axial flows of heat through the crucible walls. These conditions argue for advantage to the PBN system; however, comparatively larger radial gradients in the PBN system could lead to higher dislocation levels.},
doi = {10.1016/j.jcrysgro.2009.01.141},
journal = {Journal of Crystal Growth, 311(8):2327-2335},
number = 8,
volume = 311,
place = {United States},
year = {Sun Jan 04 00:00:00 EST 2009},
month = {Sun Jan 04 00:00:00 EST 2009}
}