Papers by Keyword: Ceramic Pigments

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Authors: Ewa Stobierska, Jerzy Lis, Mirosław M. Bućko, Agnieszka Gubernat
Abstract: The results of preliminary investigation on preparation of perovskite pigments by solid state reaction are presented. The effects of different raw materials used as component carriers on formation of colored pigments were examined. Pigment composition, optimum chromophore addition, type of mineralizer and the conditions of synthesis were determined experimentally as well as the resulting color, phase composition and morphology of powders. The wet method of preparation of starting mixtures was also analyzed.
276
Authors: Mariya B. Sedelnikova, Y.I. Pautova, Valeriy M. Pogrebenkov, Alexandra S. Shulzhenko
Abstract: The possibility of ceramic pigments synthesis using industrial waste is studied. These raw materials will lower production costs of ceramic pigments. The synthesized pigments can be recommended for obtaining on-glaze ceramic paints and volume coloring of ceramic pastes in the manufacture of construction materials.
272
Authors: F. Matteucci, M. Dondi, G. Cruciani, Giovanni Baldi, A. Barzanti
1549
Authors: G. Costa, M.J. Ribeiro, Tito Trindade, Joao A. Labrincha
Abstract: The preparation of ceramic pigments using industrial waste, a galvanizing sludge from the Cr/Ni plating process, as primary source is here reported. The ceramic pigments were prepared using the common solid state reaction process, investigating the optimal formulation, milling and firing conditions. The main focus will be given on the synthesis of chrome-tin red malayaite Ca(Cr,Sn)SiO5 pigment that was fully characterised and then tested in a standard ceramic glaze. Typical working conditions and colour development will be also reported.
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Authors: Ana Ribeiro, W. Hajjaji, M.P. Seabra, J.A. Labrincha
Abstract: In this work chrome-tin red malayaite pigments Ca(Cr,Sn)SiO5 were obtained from industrial wastes: a marble sawing sludge, a galvanizing sludge from the Cr/Ni process and a foundry sand. The pigments were prepared using the common solid state reaction process. The influence of Cr2O3/SnO2 ratio, calcination temperature and introduced sludges compositions, on its structural stability, was investigated by X-ray diffraction coupled with SEM/EDS. Standard formulations, obtained from commercial reagents, were also prepared and characterized for sake of comparison. CIELab colour measurements and UV-Vis spectroscopy were used to evaluate the stability (thermal and chemical) and applicability of the synthesized pigments in colouring distinct ceramic matrixes fired at high temperatures (1050°C-1200°C). The pigment was added (1/20 wt. ratio) to a transparent and shining lead free glaze and to a porcelain stoneware body (1/10 wt. ratio). The incorporation of three industrial wastes, in the chrome-tin red malayaite pigment, was possible without a notorious change in terms of colouring effect allowing decreasing the synthesis temperature.
1371
Authors: Asenete Frutuoso Costa, P.M. Pimentel, F.M. Aquino, D.M.A. Melo, M.A.F. Melo, R.M. Nascimento
Abstract: In this paper, CuCrO2 the compound was synthesized by a route new that uses gelatin as organic precursor in order to application as ceramic pigments. The type of compound delafossite CuCrO2 is known for its wide range of application, such as, thermoelectric devices, catalysts for the steam reforming process, ceramic pigments, NiO2 removal, among. The powders resulting from the synthesis process were calcined the 900 °C and characterized by X-ray diffraction (XRD), infrared spectroscopy, scanning electron microscopy (SEM), UV-Visible spectroscopy and colorimetry analysis. The results showed for the CuCrO2 have coloring green.
160
Authors: Mario Llusar, Carina Gargori, Sara Cerro, Jose Antonio Badenes, Guillermo Monrós
Abstract: In this communication we provide some examples of hot research topics in the field of ceramic pigments. The more classical approach of finding new host lattices or chromophores is first illustrated with recent examples of new formulations for yellow-orange, reddish-brown and blue ceramic pigments based on pseudobrookites and related titanates. Then we highlight the advantages of using non-conventional preparation routes, which can provide different pigmenting alternatives for the emerging ink-jet printing technology, such as the development of nanoor sub-micron pigments and “ceramic inks”, or the use of appropriate precursors for in situ-generating pigments.
148
Authors: Marilena Valadares Folgueras, G.B. Albuquerque, S.R. Prim
Abstract: In the ceramic industry, color is of great importance to product development. Parameters such as hue, brightness and color intensity influence the visual appearance of the ceramic surface and its market value. Research on the development of new pigments is ongoing, with focus on cost reduction, environmental suitability and color innovation. Different studies have shown the feasibility of using industrial by-products to obtain pigments. Many of these waste products have calcium carbonate and nickel oxides in their composition. This study investigates the synthesis of ceramic pigment with the structure of wollastonite - CaSiO3, with the use of nickel as chromophore ion. In order to evaluate the effect of adding nickel to the formation of crystalline phases X-ray diffraction was used. Particle size analysis was performed by Laser diffraction technique and a colorimetric study was conducted through the analysis of the pigment applied to a commercial enamel, by determining colorimetric parameters L*, a* and b*. The results showed that wollastonite combined with nickel acts as pigment and that its presence may interfere with the performance of new pigments depending on the nickel content and synthesis temperature.
170
Authors: T. Stoyanova, F. Matteucci, Anna L. Costa, M. Dondi, F.J. Carda
Abstract: Ceramic pigments with Cr-doped sphene structure (CaSn1-xCrxSiO5, CaTi1-xCrxSiO5) were synthesized by both spray drying an aqueous solution of precursor salts plus further calcining the resulting powders and conventional ceramic method. The thermal evolution of products was studied by X-Ray Powder Diffraction (XRPD). The powder morphology and chemical composition were analyzed by SEM-EDX. The color efficiency of pigments was evaluated by colorimetric analysis (CIELab system). Results showed that the spray drying process decreased the maximum firing temperature and increased the color efficiency of Cr-doped sphene pigments therefore enhancing a higher reactivity of powders compared with the solid state process.
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