Caracterização de materiais cerâmicos à base de CuCr 2 O 4 preparados pelo método da reação de combustão em solução para uso como pigmentos
| Autor: | Marcelo Moizinho Oliveira, José Hilton Gomes Rangel, E. Azevedo, I. C. Nogueira, Adeilton Pereira Maciel, Elson Longo, M. B. M. Coelho, J. S. Vasconcelos |
|---|---|
| Přispěvatelé: | PPGEM, PPGQ, IFMA, UFMA, Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Předmět: |
reação de combustão em solução
Chromite 02 engineering and technology solution combustion synthesis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper chromite pigmentos cerâmicos 0104 chemical sciences Solution combustion synthesis cromitas lcsh:TA1-2040 Ceramics and Composites ceramic pigments 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) Ceramic pigments chromite copper chromite cromita de cobre |
| Zdroj: | Cerâmica, Vol 64, Iss 369, Pp 49-56 Cerâmica v.64 n.369 2018 Cerâmica (São Paulo. Online) Universidade de São Paulo (USP) instacron:USP Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1678-4553 0366-6913 |
| Popis: | Made available in DSpace on 2018-12-11T17:35:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01. Added 1 bitstream(s) on 2021-07-15T15:04:27Z : No. of bitstreams: 1 S0366-69132018000100049.pdf: 1634271 bytes, checksum: ba3999d82fae1d86836f31398ca00097 (MD5) CuCr2O4-based ceramic pigments were prepared by the method of solution combustion synthesis starting at calcination in the range of 500 to 1100 °C, aiming to the application as ceramic pigment. The structural, morphological, chemical and optical properties of the material were studied using the techniques of X-ray diffraction, Rietveld refinement, field emission gun scanning electron microscopy, X-ray fluorescence, diffuse reflectance and L*, a*, b* colorimetric coordinates based on the CIE-L*a*b* method. The synthesized powders were mixed with matte and transparent glazes and applied in ceramic matrices. The results indicated that an increase in temperature led to the conversion of the chromite phase, in which regular polyhedra were observed, to delafossite, presenting a hexagonal platelike morphology. Diffuse reflectance revealed the formation of dark colored powders, confirmed by the colorimetric data. The synthesized powders exhibited green pigmenting ability when mixed into the ceramic glazes. PPGEM PPGQ DAQ IFMA, Av. Getúlio Vargas 4, S. Luís PPGEA UFMA, Av. dos Portugueses 1966, S. Luís CMDMC LIEC Instituto de Química UNESP, C.P. 355 CMDMC LIEC Instituto de Química UNESP, C.P. 355 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|