| 摘要 |
PURPOSE:To synthesize a single crystal of artificial beryl economically with high efficiency by controlling the speed of crystal growth. CONSTITUTION:One or >= two kinds of flux among lithium molybdate, molybdenum trioxide, lithium hydroxide, and vanadium pentoxide are added to a starting material consisting of beryllium oxide, aluminum oxide, and SiO2 having a compositional ratio corresponding to beryl to synthesize single crystal of artificial beryl by forming molten salt by heating the mixture at above the melting temp. of the flux material. In this stage, one or >= two kinds among the starting materials are sintered or vitrified previously and charged to a vessel separated into two chambers with a baffle plate to produce temp. difference to the molten salt prepd. by mixing two kinds i.e. lithium hydroxide and vanadium pentoxide among the flux materials in the powder state to synthesize single crystal of beryl by controlling the speed of crystal growth simultaneously. |
