Chinese Academy of Sciences

Wenbo Wang

Qin Hua Wang

Yuru Kang

Aiping Hui

Bin Mu

Aiqin Wang

Yongfeng Zhu

Li Zong

Aiqing Wang

Xiaowen Wang

The present disclosure relates to a method for preparation of a high temperature-resistant bismuth yellow pigment. The method comprises: mixing an oxide which served as a matrix and dopan with a bismuth source, a vanadium source, or a molybdenum source, and then placing the mixture into a mill for grinding to obtain a precursor; further calcining and crushing the precursor to obtain the high temperature-resistant bismuth yellow pigment powder. The bismuth yellow pigment has a bright color, a b* value greater than 90, a stable performance, and a high heat-resistance above 800° C. The method is environmentally friendly without waste, and reaction conditions are simple. Doping of BiVOcrystal lattices by incorporation of oxides can be achieved, so that the particle size and distribution of the bismuth yellow pigment can be effectively controlled while the color performance of the bismuth yellow pigment is greatly improved.

Method for mechanochemical preparation of high temperature-resistant bismuth yellow pigment

The disclosure relates to a method for mechanochemical preparation of an iron red pigment, which comprise steps: mixing a clay mineral, a soluble iron source and an alkali source in a mill for grinding to obtain a precursor, wherein the ratio of ball to material is controlled at 20-50, the grinding speed is 300-1200 rpm, and the grinding time is 30-360 min; and calcining the precursor at 500-900&#xb0; C. for 30-120 min to obtain a high-performance iron oxide red/clay mineral hybrid pigment. The iron oxide red/clay mineral hybrid pigment has a bright and beautiful color, high-temperature and acid resistance, and can satisfy requirements for high-performance iron oxide red pigments in fields of paints, inks, ceramics, anti-corrosive coatings, etc. Furthermore the method is a simple process without waste that is environmentally friendly and suitable for industrialized production, thus it is expected to replace existing processes of iron oxide red pigments.

Method for mechanochemical preparation of high-performance iron red/clay mineral hybrid pigment

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Lanzhou, China

Wenbo Wang