%0 Journal Article
%T Heat-Resistant Ceramic Pigments on the Base of Waste Vanadium Catalyst and Alumina
%A M. B. Sedelnikova
%A N. V. Liseenko
%A Y. I. Pautova
%A V. M. Pogrebenkov
%J Journal of Waste Management
%D 2013
%I Hindawi Publishing Corporation
%R 10.1155/2013/369174
%X Ceramic pigments on the base of technogenic silica-containing material¡ªwaste vanadium catalyst were obtained in this work. Corundum is identified along with the predominant mullite phase in the composition of pigments. The ions of nickel, chromium, and iron are embedded in the structure if the concentration of the corresponding oxide in the initial mixture does not exceed 10£¿wt.%. In this case, the oxide is not identified in a free form according to the results of X-ray diffraction analysis. Spinel CoAl2O4 is formed in cobalt pigments. The developed pigments keep the firing temperature up to 1200¡ãC. The obtained pigments may be recommended for ceramic paints and colored glazes for building materials. 1. Introduction At the present, the construction industry needs decorative building materials, which are produced with the applying of ceramic pigments, dyes, and decorative glaze. There has been a great interest within the ceramic industry in the development of high-stability pigments, which show intense tonality and satisfy both technological and environmental requirements [1]. While the first step in pigment production involves the judicious choice of raw materials, current trends are towards alternative and less expensive raw materials [2¨C4]. Normally, the materials of a high chemical purity are used for pigment production. Selected industrial wastes have been investigated for this purpose and, in particular, metal-rich sludges [5¨C8]. Indeed, industrial processes such as galvanizing or surface coating consume large amounts of water, yielding high volumes of sludge, which requires both environmental and economic treatments [7]. Black ceramic pigments were prepared from Cr/Ni-rich sludge generated from Cr/Ni plating and Fe-rich galvanizing sludge generated during steel wiredrawing [9]. In another work, chroma-tin red malayaite Ca(Cr, Sn)SiO5 pigment was synthesized using Cr/Ni plating sludge [10]. The ceramic pigments with wollastonite and diopside structures were produced using nepheline sludge [11]. The requirements to raw materials for ceramic pigment production are constant chemical composition, purity (no coloring impurities), and the ability to form stable crystalline structure. Ceramic pigments with the structure of the potassium feldspar were obtained in [12] with the use of a waste vanadium catalyst. The drawback of these pigments is low synthesis temperature 800¨C950¡ãC and limited application: in overglaze ceramic dyes and for coloring of easily fusible glazes. Ceramic pigments with the mullite structure are characterized by high fire resistance
%U http://www.hindawi.com/journals/jwm/2013/369174/