Abstract
Co-(0.5 mol%) and Ce-(0~0.3 mol%) doped cubic zirconia (ZrO :Y O = 64 : 36 mol%) single crystals grown by a skull melting method were heat-treated in N at 1200 C for 3 hrs. The brown-colored as-grown single crystals were changed into either green or blue color after the heat treatment. Before and after the heat treatment, the YSZ (yttria- stabilized zirconia) single crystals were cut for wafer form (φ7 mm × t2 mm) and round brilliant cut (φ12 mm). The optical and structural properties were examined by UV-VIS spectrophotometer and X-ray diffraction. Absorption by Ce ( F (4f) → T (5d )), Co ( A ( F) → T ( F) or T ( P)) and Co , change of ionization energy and lattice parameter were confirmed.
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