Research of Mica/Fe₃O₄ Pearlescent Pigment by Co-
Precipitation¹

Liang Xiaojuan^a,c, Xu Haiquan^b, Chen Jing^b, Sun Juncai^a, Yang Yuxiang^b,*, and Liu Xiangnong^d

^aDalian Maritime University, Dalian, 116026, P. R. China

^bDepartment of Chemistry, East China University of Science and Technology, Shanghai, 200237, P. R. China

*e-mail: yuxyang@online.sh.cn

^cCollege of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325035, P. R. China

^dTesting Center, Yangzhou University, Yangzhou, 225009, P. R. China

Received May 19, 2010

Abstract—Experiments on preparation of mica/Fe₃O₄ pearlescent pigment were performed to discuss influ-
ences of several crucial parameters on final products. The samples were characterized by XRD, HRSEM, FTIR
and color measurement, the content of Fe₃O₄ on the mica surface was also analyzed by XPS. It was found that
the smoothness, compactness and colour deepness of the coating were influenced by different pH values and
temperatures. The optimum preparation parameters of mica/Fe₃O₄ pearlescent pigment were obtained: the
value of pH 9.2; the concentration of sodium hydroxide was 0.5 mol/l; the concentration ratio of Fe³⁺ to Fe²⁺
was 1.6 : 1; the velocity of magnetic stirring was 138 v 151 r/min; reaction temperature was 70–80°C; cal-
cination temperature was 350°C and calcination time was 3 h.

Keywords: co-precipitation, pearlescent pigment, mica

10.1134/S1087659611030084

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