HUANG Gang, LU Xilong, ZENG Xinqian, CAO Chun'e

(Jingdezhen Ceramic Institute, Jingdezhen 333403 Jiangxi, China )

Abstract: The uvarovite green ceramic pigments were synthesized through the solid-state method. The effects of six unitary and two composite mineralizers on the performance of uvarovite green ceramic pigments were investigated.The as-synthesized samples were characterized by XRD and chromatometry. The most appropriate mineralizer and the best doping amount were decided. Results show the effects of the mineralizers decrease as follows: CaF₂+CaCl₂>CaF₂>Na₂SiF₆ >NaF>CaF₂+KNO₃>CaCl₂>H3BO₃>KNO₃.The pure crystal phase of Ca₃Cr₂(SiO₄) can be synthesized and the pigment exhibits the best color with the a* value at the optimal -23.52 when 6% of composite mineralizer CaF₂+CaCl₂ (the mole ratio is 1∶1) is added.

Key words: mineralizer; uvarovite; ceramic pigment