• Vapour phase crystal growth under microgravity environment

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    • Keywords


      Crystal growth; microgravity environment; space

    • Abstract


      Vapour phase crystal growth experiments performed in the Skylab and ASTP missions are reviewed. The basic vapour phase crystal growth technique is described and effect of gravity is discussed. The multipurpose furnace specially designed to carry out various experiments in flight conditions is described. Ge Se, Ge Te and GeS as well as ternary GeSe0·99 Te0·01 and GeS0·98 Se0·02 crystals have been grown in space showing improvement over similarly grown crystals on ground as determined by x-ray diffraction, chomical homogeneity and surface morphology studies. Mass flux rates under microgravity conditions have been found to be up to 10 times larger than expected indicating need for better theoretical and experimental understanding of the effect of gravity on crystal growth.

    • Author Affiliations


      Vikram Kumar1

      1. Department of Physics, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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