水熱 溫度差法에 의한 水晶의 育成

Growth of quartz crystals by hydrothermal temperature difference method

High quality quartz crystals are grown in 0.5N NaOH+LiOH solution on the seed crystal at 370-395℃ and 1200-1300 kg/㎠ condition. Growth rates are determined by the crystal thickness grown on the seed crystals with Z(0001) and X(1120) direction. Relatively high growth rate of Z(0001) direction gradually changes as the temperaure difference (ΔTi) between growth and dissolution zones from 25 to 10℃. The X axis direction is affeced by ΔTi, and +X(1120) direction shows a high growth rate than -X(1120) direction. According to the variation with kinds of solutions used, the crystal growth that in NaOH solution is found to be slower than that in Na₂CO₃ solution. However, for the case in the NaOH solution mixed with LiOH, it shows a favorable growth rate in terms of grown crystal quality.