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Composite pigments based on surface coated kaolin and metakaolin
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SYSNO ASEP 0438732 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Composite pigments based on surface coated kaolin and metakaolin Author(s) Štengl, Václav (UACH-T) RID, ORCID, SAI
Popelková, Daniela (UACH-T) SAI
Matys Grygar, Tomáš (UACH-T) RID, SAI, ORCIDSource Title Applied Clay Science. - : Elsevier - ISSN 0169-1317
Roč. 101, NOV (2014), s. 149-158Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords Kaolin ; Homogeneous hydrolysis ; Thioacetamide ; Urea ; Mullite ; Metakaolin Subject RIV CA - Inorganic Chemistry R&D Projects FR-TI1/006 GA MPO - Ministry of Industry and Trade (MPO) Institutional support UACH-T - RVO:61388980 UT WOS 000345807700021 EID SCOPUS 84908371073 DOI 10.1016/j.clay.2014.07.030 Annotation Synthesis: The method of homogeneous hydrolysis of Fe, Co, Cr, Ni, Mn,Ti, Al, and Zn salts with urea in aqueous solutions in the presence of substrates (kaolin, metakaolin and mullite) was used for the preparation of composite pigments. In these composites individual kaolinite platelets were covered by a thin layer of hydroxide or oxy-hydroxides of selected metals, which were transformed into a metal oxide layer strongly bond to the aluminosilicate surface by heat treatment. An analogous method, homogeneous hydrolysis of thioacetamide in the presence of Cd and Zn salts was used for pigments based on sulphides. Characterization: The mineralogical composition of the pigments was identified by X-ray powder diffraction (XRD), the particle morphology was studied by transmission electron microscopy (TEM) and the color was characterized in CIEL*a*b colours coordinates. Results: The kaolin and metakaolin coated with layer of metal oxides are interesting new composite materials, obtained by a very simple preparation process at a low cost. (C) 2014 Elsevier B.V. All rights reserved. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2015
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