Effects of Co/Fe Sulfate Pigments on the Colour and Phase of Porcelain

In this study, an Co/Fe coated porcelain using a cobalt and ferrous sulfate was sintered at 1,250 °C. The specimens were investigated by HR-XRD, FE-SEM (EDS), Dilatometer, UV-vis spectrophotometer. surface of the uniformly fused with pigment, white ware celadon body densely to certain thickness from surface. Other new compounds produced chemical reaction cobalt/ferrous during sintering process. These identified as ferrite spinel phases for mixed ware, andradite phase body, amorphous phase, respectively. As color pigments, it found that L* value greatly affected a* b* values significantly changed in body. fired pure mix 72.1, 60.92, 82.34, C7F3 pigment °C had 39.91, 50.17, 40.53 respectively; -1.07, -2.04, -0.19, 0.46 6.01, be 4.03. formed, seemed have great influence on change ceramic