METHOD FOR PREPARING HIGH-PERFORMANCE IRON OXIDE RED/CLAY MINERAL HYBRID PIGMENT BY MECHANOCHEMISTRY

摘要

Disclosed is a method for preparing a high-performance iron oxide red/clay mineral hybrid pigment by mechanochemistry, the method comprising mixing a clay mineral, a soluble iron source and an alkali source in a mill for grinding so as to obtain a precursor, wherein the ratio of balls to materials is controlled at 20-50, the grinding speed is 300-1200 rpm, and the grinding time is 30-360 min; and then calcining the precursor at 500ºC-900ºC for 30-120 min to obtain the high-performance iron oxide red/clay mineral hybrid pigment. The iron oxide red/clay mineral hybrid pigment has a bright and beautiful color, excellent high-temperature and acid resistance, and can satisfy requirements for high-performance iron oxide red pigments in the fields of paints, inks, ceramics, anti-corrosive coatings, etc. Furthermore, the preparation method of the present invention does not produce the three wastes, and is a simple process that is environmentally friendly and suitable for industrialized production, thus it is expected to replace existing production processes of iron oxide red pigments.