本研究成功以水解塗層製備摻雜氧化鈷 (0.5、1.0、1.5 wt％) 與氧化鋁 (0.5、1.0、1.5 wt％) 於氧化鋯 (TZP, Tetragonal Zirconia Poly-crystals) 粉末，經模壓成形，在空氣燒結至1430℃，發現當氧化鈷與氧化鋁比例相近時，所生成鈷、鋁尖晶石與氧化鋯因液相燒結使整體緻密度有所提昇。摻雜後的氧化鋯機械性質隨著緻密度有些許變化，但幅度不大，氧化鈷摻雜較氧化鋁比例高時，容易使部分氧化鋯晶粒成長，同時也發現少許氧化鋯單斜晶相，氧化鋁的摻雜較氧化鈷多時，氧化鋯晶粒尺寸較小。隨著氧化鈷摻雜濃度升高趨近藍黑色。當生成的鈷、鋁尖晶石比例多時，顏色趨近深藍色。氧化鋁則是造成整體的反射率些許下降。

Tetragonal zirconia polycrystal (TZP, ZrO2-3mol%Y2O3) was doped with cobalt oxide (0.5, 1.0, or 1.5 wt％) and aluminum oxide (0.5, 1.0, or 1.5 wt％) by a solution coating method in the powder state. After sintering the pressed specimens in air at 1430 degC, the relative density of the sintered specimens could be enhanced for the specimens having the approximately equivalent molar ratios of cobalt oxide and aluminum oxide, due to the formation of a spinel phase. The mechanical properties of the doped TZP were only slightly affected by the dopants. A minor fraction of monoclinic phase of larger grain was induced if the doping concentration of cobalt oxide was higher than that of aluminum oxide, while the grain size of zirconia became slightly smaller if the doping concentration of aluminum oxide was higher than that of cobalt oxide. The color of the doped TZP became dark blue if the concentration of cobalt oxide was high, but became royal blue if the relative abundance of the spinel phase of cobalt oxide and aluminum oxide was high. A high doping concentration of aluminum oxide could reduce the reflection ratio of visible light spectrum.

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