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Moving-Temperature-Gradient Heat-Pipe Furnace ElementIn improved apparatus, ampoule of material directionally solidified mounted in central hole of annular heat pipe, at suitable axial position between heated and cooled ends. Heated end held in fixed position in single-element furnace; other end left in ambient air or else actively cooled. Gradient of temperature made to move along heat pipe by changing pressure of noncondensable gas. In comparison with prior crystal-growing apparatuses, this one simpler, smaller, and more efficient.
Document ID
19930000567
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Gillies, Donald C.
(NASA Marshall Space Flight Center, Huntsville, AL.)
Lehoczky, Sandor L.
(NASA Marshall Space Flight Center, Huntsville, AL.)
Gernert, Nelson J.
(Thermacore, Inc.)
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 9
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
MFS-26205
Accession Number
93B10567
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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