Preparation of Bismuth Vanadate Pigment by Solid-state Calcination

Bismuth vanadate pigment was synthesized by solid-state reaction,and the influences of raw materials,calcination temperature and time on the phase compositions,particle size,specific surface area and chromatic property of the obtained bismuth vanadate were investigated in this paper.It is indicated that a more moderate preparation condition can be satisfied using NH₄VO₃ and Bi(NO₃)₃·5H₂O as raw materials.Bismuth vanadate possessing a higher phase purity,more excellent particle size distribution and specific surface area can be obtained by calcination at 500℃ for 12 h,with a chromaticity coordinates of L^*=84.91,a^*=1.18,b^*=85.87 and c^*=85.88 for the product demonstrating a superior pigmentary performance to the bismuth vanadate sold around the market.