MECHANO-CHEMICAL PREPARATION OF POWDER QUARTZ/TiO2COMPOSITE PARTICLES

Gao-Xiang Du (), Hao He, Li-Bing Liao and Li-Juan Wang
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Gao-Xiang Du: School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, P. R. China
Hao He: School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, P. R. China
Li-Bing Liao: School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, P. R. China
Li-Juan Wang: School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, P. R. China

Surface Review and Letters (SRL), 2013, vol. 20, issue 02, 1-7

Abstract: Titanium dioxide pigment is a white pigment of high performance. However, its production could cause severe environmental and resource problems. In this paper, powder quartz/TiO2composite particles (PQ/TCP), a type of core (powder quartz)–shell(TiO2) composite powder, were prepared by a mechano-chemical method. The pigment properties of PQ/TCP and the mechanism of the mechano-chemical reaction between quartz andTiO2were investigated. Orthogonal analyses of experimental vairables showed optimal pigment characteristics of PQ/TCP under the following conditions: 4 h of activation for powder quartz, mixing/grinding at 1000 rpm for 1 h, with a mixing slurry made of 50% powder quartz and 0.4% dispersant. Powder quartz was evenly coated byTiO2and theSi–O–Tibond was formed between powder quartz andTiO2in PQ/TCP as revealed by FTIR analyses and confirmed by surface thermodynamic calculation.

Keywords: Grinding; mechano-chemical; pigment performance; powder quartz/TiO2composite particles; titanium dioxide (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X13500169

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