Chineese researchers prepared  bright blue CoAl2O4/halloysite hybrid pigments via combining chemical co-precipitation and calcination process. The introduction of halloysite not only decreased the calcining temperature for formation of spinel-type CoAl2O4, but also enhanced the color properties of CoAl2O4 pigments including hue, brightness and chroma. The hybrid pigments could be well dispersed into water-based paint with good suspension stability. It indicated that the hybrid pigments could be served as a promising pigment with bright blue to be applied in various fields such as ceramics, water based paints, inks, etc.


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Volume 139, April 2017, Pages 473–481