Abstract
Rutile titanium dioxide pigments were prepared by using metatitanic acid as raw material, hydrolyzed from industrial low concentration titanyl sulfate solution via short sulfate process. The orthogonal interactions of the addition of salt treatment agents (ZnO, K2O, P2O5) and the highest calcination temperature were investigated by using four-factor quadric orthogonal regression test. The metatitanic acid and rutile TiO2 were characterized by XRD, particle size distribution and pigment properties test. Different salt addition and the highest calcination temperature had great effects on the achromatic power (TCS) of the rutile TiO2 pigments. The orthogonal interactions regression model for TCS was built and showed high repeatability and stability, which could be used to forecast the pigment properties and preset the salt treatment and calcination conditions. And the optimal salt treatment conditions were ZnO of 0.36%, K2O of 0.70%, P2O5 of 0.20%, and the highest calcination temperature of 850 °C.
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