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Effect of Mass Transport Stability and Undercooling on Nucleation of ZnS Crystals in Closed Ampoule CVT
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نویسنده
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Tafreshit M. J. ,Dibaie B. ,Fazli M. ,Alidaic M.
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منبع
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iranian journal of materials science and engineering - 2011 - دوره : 8 - شماره : 1 - صفحه:48 -52
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چکیده
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Zns crystals were grown by cvt technique using iodine as a transporting agent under different mass transport stability conditions. theoretically predicted optimum growth temperature and lower undercooling ( δt) were appliedforgetting better control on mass transport and nucleation inside the quartz ampoule. zns crystals were grown at both optimum and non-optimum temperatures under different undercooling conditions and their characteristics were compared with each other. for 2 mg/cm3 concentration of transporting agent ( c) and δt= 15 °c growth at optimum temperature (1000 °c) yielded zns crystals with volume of 12x4x2 mm3 and proper quality. for c= 2 mg/cm3 and δt=50 °c growth at non optimum temperature (1050 °c) resulted to the formation of zns polycrystallites with faulty structures
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کلیدواژه
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ZnS ,CVT ,Nucleation
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آدرس
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semnan university, Faculty of Science, Physics Department, ایران, semnan university, Faculty of Science, Physics Department, ایران, semnan university, Faculty of Science, Chemistry Department, ایران, semnan university, Faculty of Science, Physics Department, ایران
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پست الکترونیکی
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m..jtafreshi@yahoo.com
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Authors
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