Abstract

AbstractCeramics may be colored by melting a transition metal into a glass or dispersing it in a ceramic body, by precipitating a colored crystal in a transparent matrix, or by dispersing in a matrix an insoluble crystal or crystals that are colored. The latter is the principal method of coloration of ceramic coatings. Most of the crystals used for ceramic pigments are complex oxides. The choices to obtain the principal colors are described in this article. Also discussed are the factors to be considered in selecting a ceramic pigment: processing stability requirements, pigment uniformity and reproducibility, particle size distribution, dispersibility, and compatibility of all materials to be used.

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