GROWING METHOD FOR LITHIUM TETRABORATE SINGLE CRYSTAL

摘要

PURPOSE:To simply grow an Li2B4O7 single crystal by using a crystal deposited on a metallic wire as a seed crystal to obtain sufficient holding strength of the seed crystal. CONSTITUTION:A noble metallic wire such as a platinum-rhodium wire 9 is fixed to an alumina pipe 8 with alumina cement 10 and calcined by heating to a high temp. This wire 9 as a seed is dipped in molten Li2B4O7 and pulled up under rotation. While pulling up the wire 9, neck-down operation is carried out to obtain a single crystal growing in the direction of the C axis, and the grown single crystal 11 is cut at the thin part 12. The part 12 is repeatedly used as a seed crystal.