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The growth of zinc selenide single crystals by physical vapor transport in microgravity

Author
Cheng, Hai-Yuin
Published
Jun 5, 1990.
Physical Description
1 electronic document
Additional Creators
Rosenberger, Franz E. and Anderson, Elmer E.
Online Version

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Summary
Growth and characterization studies will be performed on zinc selenide single crystals. The high temperature outgassing behavior of the silica ampoule material will be studied in order to develop a cleaning and bake-out procedure that will minimize the amount of impurities introduced into the vapor from the ampoule materials and in particular during the seal-off procedure. The outgassing behavior of the ZnSe starting material will be studied during high vacuum refinement at elevated temperatures in order to develop a temperature pressure program that will optimize the removal of impurities while minimizing a shift in stoichiometry due to preferred evaporation of the higher fugacity component. The mass spectrometer system was completed, and after calibration, will be used to perform the above tasks. The system and its operation is described in detail.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19910001442.
Accession ID: 91N10755.
NAS 1.26:180428.
NASA-CR-180428.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15684170