Author/Authors :
Tafreshit, M. J. semnan university - Faculty of Science - Physics Department, سمنان, ايران , Dibaie, B. semnan university - Faculty of Science - Physics Department, سمنان, ايران , Fazli, M. semnan university - Faculty of Science - Chemistry Department, سمنان, ايران , Alidaic, M. semnan university - Faculty of Science - Physics Department, سمنان, ايران
Abstract :
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
