| 摘要 |
PURPOSE:In the titled synthesis by fused salt method using a solvent, to obtain high-quality beryl single crystal efficiently, by carrying out the use of raw material substance and temperature control more accurately, regulating crystal growth rate. CONSTITUTION:A raw material substance showing almost beryl composition, comprising BeO, Al2O3, SiO2, and, if necessary, Cr oxide, and other colorant, is mixed with one or more of lithium molybdate, MoO3, LiOH, V2O5, etc. as a solvent. The mixture is heated at >= the melting temperature of the solvent, a fused salt is formed to synthesize or to grow artificial beryl single crystal. In order to regulate crystal growth rate, lithium molybdate is premixed with MoO3 in powder to give a fused salt, one or more of the raw material substances are sintered or made into glass to give a raw material substance, and the fused salt, the raw material substance and quartz are used. Further the crucible 5 is divided by the buffle 7 into the seed crystal growth zone 12 and the zone 13 of the raw material and quartz, temperature is controlled in each zone, an amount of dissolution is regulated, and an amount of transportation of the raw material substance to the zone 12 is controlled. |
