INFLUENCE OF THE Ni/Mg RATIO ON THE COLOUR OF SPINEL PIGMENTS PREPARED BY A  MODIFIED SOL – GEL METHOD

Firuța GOGA; Roxana  DUDRIC; Liliana  BIZO; Alexandra  AVRAM; Alexandru-Horațiu MĂRINCAŞ; Csaba VARHELY Jr.; Thomas  DIPPONG

doi:10.24193/subbchem.2017.1.23

INFLUENCE OF THE Ni/Mg RATIO ON THE COLOUR OF SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD

Authors

Firuța GOGA Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: fgoga@chem.ubbcluj.ro. https://orcid.org/0000-0001-8367-7874
Roxana DUDRIC Faculty of Physics, Babes-Bolyai University, Cluj-Napoca, Romania. Email: roxana.dudric@ubbcluj.ro. 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. Email: lbizo@chem.ubbcluj.ro. 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. Email: alexandra.avram@ubbcluj.ro.
Alexandru-Horațiu MĂRINCAŞ Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania. Email: horatiu.marincas@yahoo.com. 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. Corresponding author: dippong.thomas@yahoo.ro. 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. Email: dippong.thomas@yahoo.ro. https://orcid.org/0000-0002-4625-6525

DOI:

https://doi.org/10.24193/subbchem.2017.1.23

Keywords:

ceramic pigment nanopowders, nickel spinels, sol – gel method, sucrose, pectine.

Abstract

This paper focuses on the synthesis and analysis of some spinel-structured, ceramic pigment nanopowders (Mg_(1-x)Ni_xAl₂O₄) 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.

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STUDIA UBB CHEMIA, Volume 62 (LXII), No. 1, March 2017

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Published

2017-03-30

How to Cite

GOGA, F., DUDRIC, R. ., BIZO, L. ., AVRAM, A. ., MĂRINCAŞ, A.-H., VARHELY Jr., C., & DIPPONG, T. . (2017). INFLUENCE OF THE Ni/Mg RATIO ON THE COLOUR OF SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD. Studia Universitatis Babeș-Bolyai Chemia, 62(1), 261–270. https://doi.org/10.24193/subbchem.2017.1.23