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Forced convection by Inclined Rotary Bridgman method for growth of CoSb3 and FeSb2 single crystals from Sb-rich solutions
Ist Teil von
Journal of crystal growth, 2017-10, Vol.475, p.346-353
Ort / Verlag
Amsterdam: Elsevier B.V
Erscheinungsjahr
2017
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
•An effective kind of forced convection by rotation of an inclined ampoule is used.•Inclusion-free growth of FeSb2 and CoSb3 single crystals is achieved.•Numerical modelling confirms effective mixing mechanism in the solution.
Sb-based compounds such as CoSb3 and FeSb2 are interesting materials for thermoelectric applications. Their single crystal growth can be achieved from high-temperature solutions that are strongly enriched in Sb. In Bridgman growth using closed ampoules, effective mixing of the solution is an important prerequisite in order to minimize the high risk of liquid inclusion formation. We have successfully grown inclusion-free single crystal of CoSb3 and FeSb2 by rotating the ampoule in a Bridgman-type crystal growth set-up being inclined by 75° with respect to the vector of gravity. Numerical modelling as well as experimental growth studies have demonstrated the strong influence of forced convection that is achieved by this modified directional solidification technique called Inclined Rotary Bridgman method.