PRODUCTION OF CRYSTAL OF MULTIPLE SYSTEM

摘要

PURPOSE:To produce high-quality crystal of multiple system having stable characteristics in high yield, by putting a proper substance in a vapor pressure control part communicated with a reaction part to grow crystal consisting of plural elements and sustaining the crystal at a given temperature. CONSTITUTION:A sealed reaction tube 1 is divided by a partition wall 2 into a reaction part 3 and a vapor pressure control part 4 and both the parts are communicated with a small hole. A raw material for crystal of multiple system consisting of three or more constituent elements placed on a boat 5 is put in the reaction part 3. The raw material is heated by a furnace 8 set at the outer periphery of the reaction tube 1 and crystal 10 is grown from melt 9 of the raw material. Further a vapor pressure control substance 6 consisting of two or more components having high vapor pressure of the raw material is put in the vapor pressure control part 4 and is kept at a given temperature by the furnace 8. Consequently, high-quality crystal of multiple system is obtained by growing the crystal 10 while controlling the vapor pressure of the reaction system.