Síntese de pigmentos cerâmicos inorgânicos nanométricos pela rota dos precursores poliméricos
Considering the constant evolution of technology in growth and the need for production techniques in the ceramics area to move forward together, we sought in this study, the research and development of polymeric precursor method to obtain inorganic ceramic pigments. Method that provides quality to o...
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| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/15643 |
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| Resumo: | Considering the constant evolution of technology in growth and the need for production
techniques in the ceramics area to move forward together, we sought in this study, the
research and development of polymeric precursor method to obtain inorganic ceramic
pigments. Method that provides quality to obtain the precursor powders of oxides and
pigments at the same time, offers time and cost advantages, such as reproducibility,
purity and low temperature heat treatment, control of stoichiometry. This work used
chromium nitrate and iron nitrate as precursors. The synthesis is based on the dissolution
of citric acid as a complexing agent, addition of metal oxides, such as ion chromophores;
polymerization with ethylene glycol and doping with titanium oxide. Passing through precalcination,
breakdown, thermal treatments at different temperatures of calcination (700
to 1100 oC), resulting in pigments: green for chromium oxide deposited on TiO2 (CrTiO3)
and orange for iron oxide deposited on TiO2 ( FeTiO3). Noticing an increase of opacity
with increasing temperature. Were performed thermal analysis (TG and ATD) in order
to evaluate its thermodecomposition. The powders were also characterized by techniques
such as XRD, revealing the formation of crystalline phases such as iron titanate (FeTiO3)
and chrome titanate (CrTiO3), SEM, demonstrating formation of rounded particles for
both oxides and Spectroscopy in the UV-Visible Region, verifying the potential variation
and chromaticity os pigments. Thus, the synthesized oxides were within the requirements
to be applied as pigments and shown to be possible to propose its use in ceramic materials |
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