The Effect of Adding Elements on Single Crystal Formation of InSb Particles by Using Short Drop Tube Process

DOI:10.15011/ijmsa.33.330216
Int. J. Microgravity Sci. Appl. 2016p330216
Author
Kenta ARAI and Katsuhisa NAGAYAMA
Organization
Department of Materials Science, Faculty of Engineering, Shibaura Institute of Technology
Abstract
In this study, we investigate the microstructure of InSb particles to which several elements are added (Ag, Sn, Al, and Fe). The microstructure of these particles changes depending on the kind of element incorporated. InSb becomes the primary phase and exhibits a polycrystalline structure by adding Ag or Sn, whereas it becomes a secondary phase by adding Al or Fe. When Al is added, AlSb becomes the primary phase and the InSb phase is solidified as fine crystal grains. When Fe is added, FeSb becomes the primary phase and InSb phase is solidified as large crystal grains. We consider that the AlSb phase becomes a nucleation site; however, the FeSb phase does not become a nucleation site of the secondary phase of the InSb compound. In addition, we suggest that addition of Fe is effective for monocrystallization of InSb particles.
Keyword(s)
Drop tube process, Crystal growth, Ssingle crystal formation, Nucleation site, FeSb fine crystal
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Received: 22 December 2015, accepted 10 April 2016, published 30 April 2016

© The Japan Society of Microgravity Applicaiton

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