Abstract
A crystal growth furnace with new structure was designed based on a conventional vertical resistance-wound tubular two-temperature-zone furnace in order to meet the requirements of growing high-quality AgGaS 2 single crystals. Large temperature gradients of 25–30 °C/cm at the growth interface and stable thermal profile were obtained. Integral and crack-free AgGaS 2 single crystals with fewer defects were grown successfully and reproducibly in the furnace mentioned above. A new cleavage face (1 0 1) was observed in the as-grown AgGaS 2 crystal. The crystal was characterized by using XRD and IR transmission microscopy. It is found that multiple diffraction peaks of the {1 0 1} faces are evident, and that IR transmittance is above 60%. The results show not only that the modified furnace is a new promising furnace for the growth of AgGaS 2 single crystals, but also that the quality of the grown crystal is good.
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