INFLUENCE OF THE Ni/Mg RATIO ON THE COLOUR OF SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD
Date
2017-03-30
Authors
Firuța GOGA
Roxana DUDRIC
Liliana BIZO
Alexandra AVRAM
Alexandru-Horațiu MARINCAȘ
Csaba VARHELY Jr.
Thomas DIPPONG
Journal Title
Journal ISSN
Volume Title
Publisher
STUDIA UBB CHEMIA. Published by Babeş-Bolyai University
Abstract
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.
Description
STUDIA UBB CHEMIA, LXII, 1, 2017 (p. 261-270), DOI:10.24193/subbchem.2017.1.23
Firuța GOGA
Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania
https://orcid.org/0000-0001-8367-7874
Roxana DUDRIC
Faculty of Physics, Babes-Bolyai University, Cluj-Napoca, Romania
https://orcid.org/0000-0002-4123-0801
Liliana BIZO
Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania
https://orcid.org/0000-0002-8775-8492
Alexandra AVRAM
Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania
https://orcid.org/0009-0006-7583-778X
Alexandru-Horațiu MĂRINCAŞ
Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania
https://orcid.org/0000-0003-2301-7721
Csaba VARHELY Jr.
Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania
https://orcid.org/0000-0003-2938-4637
Thomas DIPPONG
Department of Chemistry and Biology, Faculty of Sciences, Technical University, Cluj-Napoca; Heidenroslein Association, Baia Mare, Romania
*Corresponding author: dippong.thomas@yahoo.ro
https://orcid.org/0000-0002-4625-6525
Keywords
ceramic pigment nanopowders, nickel spinels, sol – gel method, sucrose, pectine
Citation
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