Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/handle/123456789/31283
Title: Pechini synthesis and microstructure of nickel-doped copper chromites
Authors: Pimentel, Patrícia Mendonça
Martinelli, Antonio Eduardo
Melo, Dulce Maria de Araújo
Pedrosa, Anne Michelle Garrido
Cunha, Jardel Dantas
Silva Júnior, Carlos Neco da
Keywords: Chromites;Ceramic pigments;Pechini method;Spinel
Issue Date: 2005
Publisher: Scielo
Citation: PIMENTEL, Patrícia Mendonça; MARTINELLI, Antonio Eduardo; MELO, Dulce Maria de Araújo; PEDROSA, Anne Michelle Garrido; CUNHA, Jardel Dantas; SILVA JÚNIOR, Carlos Neco da. Pechini synthesis and microstructure of nickel-doped copper chromites. Materials Research, [S.L.], v. 8, n. 2, p. 221-224, jun. 2005. Disponível em: https://www.scielo.br/scielo.php?pid=S1516-14392005000200024&script=sci_abstract&tlng=en. Acesso em: 24 nov. 2020. http://dx.doi.org/10.1590/s1516-14392005000200024.
Portuguese Abstract: Spinel-type solid solutions were synthesized by the Pechini method and calcined between 500 and 900 °C for 4 hours and at 900 °C for 8 hours to produce ceramic pigments. The resulting powders were characterized by thermogravimetric analysis, Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), particle size analysis and BET surface area measurements. The formation of spinel took place upon calcination at 700 °C. IR spectroscopy revealed the presence of N1 and N2 bands, typical of spinel structures, broadened by the presence of more than one cationic species in the structure. The specific area of the resulting powder decreased from 24.7 to 1.4 m2 g-1 as the calcination temperature increased from 700 to 900 °C. Microstructural analyses revealed the presence of crystalline spinel as the only phase present in powders calcined at 900 °C. Colorimetric analyses using L*a*b* coordinates and UV-visible spectroscopy revealed that the pigment was predominantly black
URI: https://repositorio.ufrn.br/handle/123456789/31283
ISSN: 1516-1439
1980-5373
Appears in Collections:CT - DEMAT - Artigos publicados em periódicos
IQ - Artigos publicados em periódicos

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