| 摘要 |
PURPOSE: A method of manufacturing a blue cubic zirconia single crystal is provided to improve remarkably the color and reproducibility by adding Nd2O3, CaO and Fe2O3 to cobalt. CONSTITUTION: ZrO2 of 50 to 90 weight% and Y2O3 10 to 50 weight% are mixed with each other. Co3O4, Nd2O3, CaO and Fe2O3 of 0.15 to 7.0 weight% are mixed to the Y2O3. The weight of Fe2O3 is less than 50% of that of Nd2O3. The mixture is filled in a skull container of high frequency inductively heating equipment. A zirconia single crystal is grown by performing skull melting using an oscillating frequency of 200 to 500 kHz. The single crystal is heat-treated at the temperature of 950 to 1500°C in a furnace of N2 or Ar neutral atmosphere or H2, CO, or NH4OH reducing atmosphere.
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