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http://dx.doi.org/10.3740/MRSK.2014.24.2.93

Reactions of Various Ceramic Materials with Cobalt Sulfate Solution  

Won, Il-An (Department of Ceramic Design, Kangwon National University)
Kim, Kyung-Nam (Department of Materials Engineering, Kangwon National University)
Publication Information
Korean Journal of Materials Research / v.24, no.2, 2014 , pp. 93-97 More about this Journal
Abstract
In this study, a cobalt sulfate ceramic coating was sintered on various clays at $1250^{\circ}C$. The specimen characteristics were investigated by X-ray diffraction(XRD), scanning electron microscopy(SEM), TG-DTA, UV-vis spectrophotometer, and HRDPM. The ceramic coating had a constant thickness of thousands ${\mu}m$, and the surface was confirmed to be densely fused. Other new compounds were produced by the cobalt sulfate sintering process and reactions. These compounds were a $CoAl_2O_4$ phase, $Co_2SiO_4$ phase, anorthite($CaAl_2Si_2O_8$) phase, and $FeAl_2O_4$ phase, respectively. UV properties of the coated specimen were investigated, celadon clay specimen in 530-550 nm band is showing a dark gray color. The white clay and white mix clay specimen in 460-500 nm band is showing a blue color. The cobalt-aluminate($CoAl_2O_4$) spinel and the cobalt-silicate olivine($Co_2SiO_4$) were the strongest of the ceramic pigments, producing a very pure, navy blue color.
Keywords
ceramic coating; cobalt aluminate; cobalt sulfate; sintering;
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Times Cited By KSCI : 1  (Citation Analysis)
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