Pechini synthesis and microstructure of nickel-doped copper chromites

dc.contributor.authorPimentel, Patrícia Mendonça
dc.contributor.authorMartinelli, Antonio Eduardo
dc.contributor.authorMelo, Dulce Maria de Araújo
dc.contributor.authorPedrosa, Anne Michelle Garrido
dc.contributor.authorCunha, Jardel Dantas
dc.contributor.authorSilva Júnior, Carlos Neco da
dc.date.accessioned2021-01-19T18:39:10Z
dc.date.available2021-01-19T18:39:10Z
dc.date.issued2005
dc.description.resumoSpinel-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 blackpt_BR
dc.identifier.citationPIMENTEL, 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.pt_BR
dc.identifier.doi10.1590/S1516-14392005000200024
dc.identifier.issn1516-1439
dc.identifier.issn1980-5373
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/31283
dc.languageenpt_BR
dc.publisherScielopt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectChromitespt_BR
dc.subjectCeramic pigmentspt_BR
dc.subjectPechini methodpt_BR
dc.subjectSpinelpt_BR
dc.titlePechini synthesis and microstructure of nickel-doped copper chromitespt_BR
dc.typearticlept_BR

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