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Growth of triglycine sulfate (TGS) crystals by solution techniqueThe growth of crystals from solution is greatly influenced by buoyancy driven convection. In a low-g environment, convection is greatly suppressed and diffusion becomes the predominant mechanism for thermal and mass transport. An experiment to grow TGS crystals by solution technique during the orbital Spacelab III mission has been designed. Crystals are grown by a new and unique technique of extracting heat from the crystal through a sting. The cooling at the sting tip is responsible for the desired supersaturation near the growing crystal. Calculations indicate that the cooled sting technique for solution crystal growth is necessary in low-g to maintain a maximum growth rate of 1 mm/day. Results of groundbased work in support of the flight experiment are discussed.
Document ID
19830062076
Document Type
Conference Paper
Authors
Lal, R. B.
(Alabama, A & M University Normal, AL, United States)
Kroes, R. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Wilcox, W. R.
(Clarkson College of Technology Potsdam, NY, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Astronautics (General)
Meeting Information
Meeting: Materials processing in the reduced gravity environment of space; Annual Meeting
Location: Boston, MA
Start Date: November 16, 1981
End Date: November 18, 1981
Sponsors: NASA
Accession Number
83A43294
Funding Number(s)
CONTRACT_GRANT: NAS8-32945
Distribution Limits
Public
Copyright
Other

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