AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Autori: FIRUTA GOGA, ROXANA DUDRIC, LILIANA BIZO, ALEXANDRA AVRAM, ALEXANDRU HORATIU MARINCAS, CSABA VARHELYI JR., THOMAS DIPPONG.
DOI: http://dx.doi.org/10.24193/subbchem.2017.1.23
Published Online: 2017-03-17
Published Print: 2017-03-31
VIEW PDF: INFLUENCE OF THE Ni/Mg RATIO ON THE COLOUR OF SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD
This paper focuses on the synthesis and analysis of some spinel-structured, ceramic pigment nanopowders (Mg(1-x)NixAl2O4) using a modified sol – gel method. This study emphasizes the influence of the Ni/Mg ratio and that of the thermal treatment on the properties of the obtained powders. The behavior of the dried gels during calcination was studied by differential thermal analysis. The formation of the spinel structure after calcination was analyzed using x-ray diffraction. The colour of the powders was characterized by UV – VIS spectroscopy, determining the absorption spectra. In addition, the trichromatic coordinates were determined, and the corresponding pigment positions were fixed on the chromaticity diagram.
Keywords: ceramic pigment nanopowders, nickel spinels, sol – gel method, sucrose, pectine.
