Preparation of cobalt blue ceramic glaze ink based on sol-gel method

Cobalt blue pigment precursor xerogel was prepared by sol-gel method and then calcined to obtain cobalt blue pigment by self-propagating combustion. The effect of process parameters such as pH value, metal ion concentration, dispersant, sol reaction temperature, citric acid dosage and calcination temperature on the crystalline form of cobalt blue pigment was studied. The ultrafine cobalt blue pigment obtained by the above method is used as the inorganic pigment of the blue ink, and the blue ceramic ink is prepared by a dispersion method. The effects of the milling medium size, milling time, dispersion effect of different kinds of dispersants, and solvent addition was studied. Dry gel is processed by self-propagating combustion and then calcined at high temperature. With the calcination temperature increasing, pigment color is more bright. At 1250 ℃, the grain size of the sample is approximately 200 to 500 nm. The sample is tested by a colorimeter, and its b* value is -43.09. Copyright © 2018, AIDIC Servizi S.r.l.