The growth of crack-free 3-inch-diameter lithium tetraborate (Li2B4O7) single crystals by the Czochralski method has been studied. The relationships between crystal cracking rate during growth and the crystal rotation rate and the position of the work-coil have been examined. It is concluded that crystal cracking at a later stage of growth is related to the temperature fluctuation in melt.
- Growth rate change
- LiBO single crystal
- Temperature fluctuation in melt