SYNTHESIS OF TOURMALINE RED COLORED CUBIC ZIRCONIA SINGLE CRYSTALS

摘要

A manufacturing method of a tourmaline red colored cubic zirconia single crystal is provided to enable mass production and improve quality by adding MnO2 to the material of the crystal as a color developer and performing a heat-treatment in a neutral or reduction atmosphere. A manufacturing method of a tourmaline red colored cubic zirconia single crystal includes the steps of: mixing an oxide material; charging a skull melting apparatus with a compound obtained from the prior step, and growing a zirconia single crystal with a skull melting method; and performing the heat-treatment of the single crystal at the temperature of 950 - 1500 degrees centigrade in a furnace of a neutral or reduction atmosphere. The oxide material includes ZrO2 of 50 - 90 weight%, Y2O3 of 10 - 50 weight%, CeO2, Er2O3, a color former of 0.02 - 9 weight%, and MnO2 of 0.01 - 4 weight% as a color developer. The color developer is added less than half of the color former.