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Open AccessArticle

Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments

1
Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
2
School of Materials Science and Technology, Shenyang University of Chemical Technology, Shenyang 110142, China
3
Dalian Huanqiu Minerals (Group) Corp., Building 3F, No. 159 Jinma Road, Dalian Economic and Technological Development Zone, Dalian 116600, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(4), 593; https://doi.org/10.3390/ma11040593
Received: 3 February 2018 / Revised: 9 April 2018 / Accepted: 9 April 2018 / Published: 12 April 2018
TiO2-coated wollastonite composite pigments were prepared by the mechano-chemical grinding of wollastonite and TiO2 powder together in a wet ultrafine stirred mill. X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and infrared spectra were used to investigate the microstructures and morphologies of the composite and the reaction mechanism. The results indicate that the TiO2-coated wollastonite composite pigments have similar properties to titanium dioxide pigment, showing much better properties than dry and wet mixing of wollastonite and TiO2. The hiding power of TiO2-coated wollastonite composite pigments (45% TiO2) is 17.97 g/m2, reaching 81.08% of titanium dioxide. A firm combination between wollastonite and TiO2 is obtained through a surface dehydroxylation reaction during the mechano-chemical method. View Full-Text
Keywords: wollastonite; TiO2; composite particles; mechano-chemical method; pigment properties wollastonite; TiO2; composite particles; mechano-chemical method; pigment properties
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MDPI and ACS Style

Chen, W.; Liang, Y.; Hou, X.; Zhang, J.; Ding, H.; Sun, S.; Cao, H. Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments. Materials 2018, 11, 593.

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