SYNTHESIS OF HIGH-QUALITY AGGASE2 POLYCRYSTALLINE MATERIAL BY THE MELT TEMPERATURE OSCILLATION METHOD

The melt temperature oscillation method (MTOM) has been used to synthe size high-quality AgGaSe2 polycrystalline materials. The mechanism and advantages of MTOM for synthesizing a single phase of AgGaSe2 are dis cussed. It is found that the polycrystalline material synthesized by M TOM is pure single phase, is free of interior voids and has a high mas s density, which is better than that synthesized by the conventional m ethod. The crack-free, as-grown single crystal of AgGaSe2 grown using polycrystalline materials by MTOM has a high infrared transmission (62 .4% at 10.6 mu m), which is greater than that of the as-grown crystal synthesized using polycrystalline materials by the conventional method , even after the annealing treatment. MTOM is a new, effective method for synthesizing high-quality polycrystalline materials.