Orthogonal Mutual Influences of Salt Processing and Calcination on Rutile Titanium White Pigment

The orthogonal mutual influences of the amount of salt treatment agents (zinc,potassium and phosphate salt) and the highest calcination temperature on the preparation of rutile titanium white pigment were investigated by L₂₇(3¹³) orthogonal experiments,using meta-titanic acid hydrolyzing from the industrial titanyl sulfate solution of low concentration as raw material.The orthogonal optimizing experiments for preparing rutile titanium white pigment were carried out based on the salt processing and calcination.The achromic ability,blue phase,whiteness and granularity of the calcined samples were detected and SEM,TEM were employed for the characterizations.The optimum conditions are zinc salt amount of 0.30%,potassium salt amount of 0.60%,phosphate salt amount of 0.12% and the highest calcination temperature of 850℃.The achromic ability,blue phase,whiteness and granularity of the rutile titanium white pigment by the optimum conditions are respectively 1713,3.07,96.88 and 0.28 um.It shows that the orthogonal mutual influences with different degrees exist between the salt treatment agents and calcination strength,and also among the salt treatment agents themselves.