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INFLUENCE OF pH ON IRON DOPED Zn2TiO4 PIGMENTS
Zinc titanate, Zn2TiO4, can be used as ceramic pigment, due to its stability up to approximately 1550°C and chemical inertia. This
work aims to obtain ceramic pigments, using the polymeric precursor method, based on zinc titanate spinel (Zn2TiO4), containing 5 mol% of iron. The synthesis was carried out with pH values of 1, 7 and 10, in order to verify the influence of the chelation upon the obtained color. The characterization of the samples was performed by termogravimetric analyses, X-ray diffraction and colorimetry. The crystallite size decreases with the increase of pH. The segregation of zinc oxide or titanium oxide was observed, according to the pH of the polymeric resin. The pH of the synthesis changed the color of pigment due to the iron ligand field.
S. C. Souza, Ieda Maria Garcia dos Santos, Márcia Rejane Santos da Silva, M.R. Cássia-Santos, Luiz Edmundo Bastos Soledade, Antonio Gouveia de Souza, Severino J.G. Lima, Elson Longo |
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Acesse o CMDMC
pelo celular
Fotomicrografia referente a sistemas de TiO2.
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