Hwang, D.-H. Han, Kyong Sop Lee, B.-H. 2024-01-20T18:30:50Z 2024-01-20T18:30:50Z 2021-09-02 2010-11 1229-7801 https://pubs.kist.re.kr/handle/201004/130988 Turquoise blue pigment of Vanadium-zircon blue (DCMA number 14-42-2), which was already commercialized, was stable to be reproduced but insufficient to give strong blue. However, it possible to obtain more intense blue by partially substituting cobalt ions into the willemite(Zn2Si04) lattice classified into DCMA number 7-10-2 for blue ceramic pigment. By the composition of willemite CoxZn2-xSiO4(X=0-01, 0.03, 0.05, 0.07, 0.09 mole), this study used reagent grade zinc oxide, cobalt oxide and silicon dioxide as starting materials, carrying out the synthesis with solid reaction method by adding H3BO3 as a mineralizer. The firing temperature was between 1200°C and 1400°C. The characteristics of synthesized pigment were analyzed by X-ray diffraction, Raman spectroscopy and SEM and the characteristics of color tones were analyzed by UV-Vis spectroscopy and CIE-L*a*b* measurement. As a result, the optimal composition was Zn1.95Co0.05 with 1wt% of H 3BO3 as a mineralizer and firing condition was 1350°C/3 h. L*a*b* value was 29.25, 41.03, -59.93 for on glaze pigment and 37.03, 36.41, -60.03 for under glaze pigment. Korean 한국세라믹학회 Synthesis and formation mechanism of cobalt doped willemite blue pigments Article 10.4191/KCERS.2010.47.6.603 1 Journal of The Korean Ceramic Society, v.47, no.6, pp.603 - 607 Journal of The Korean Ceramic Society 47 6 603 607 N scopus kci ART001496975 2-s2.0-78751560943 Article Blue pigment Ceramic pigment Coxzn2sio4 pigment Cobalt ion Cobalt oxides Color properties Color tone Firing conditions Firing temperature Formation mechanism Intense blue Optimal composition Reagent grades SEM Silicon dioxide Solid reaction method Starting materials UV-vis spectroscopy Willemite Ceramic materials Cobalt Glazes Raman spectroscopy Silica Silicate minerals Silicon oxides Synthesis (chemical) Ultraviolet spectroscopy Vanadium X ray diffraction Zinc Zinc oxide Color Blue ceramic pigment Coxzn2sio4 pigment Color properties Willemite