INFLUENCE OF THE THERMAL TREATMENT ON THE COLOUR OF RO٠Al₂O₃ (R=Co, Ni) TYPE SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD

Firuţa GOGA; Roxana DUDRIC; Liliana-Antonela  BIZO; Alexandra  AVRAM; Thomas  DIPPONG; Gabriel  KATONA; Gheorghe  BORODI; Andreea  ANTON

INFLUENCE OF THE THERMAL TREATMENT ON THE COLOUR OF RO٠Al₂O₃ (R=Co, Ni) TYPE SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD

Authors

Firuţa 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-Antonela 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.
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
Gabriel KATONA Department of Chemistry and Chemical Engineering of Hungarian Line of Study, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Email: gabik@chem.ubbcluj.ro. https://orcid.org/0000-0003-3508-0023
Gheorghe BORODI Department of Molecular and Biomolecular Service, National Institute for Research and Development for Isotopic and Molecular Technologies, Cluj-Napoca, Romania. Email: borodi@itim-cj.ro. https://orcid.org/0000-0003-4915-4169
Andreea ANTON Department of Chemical Engineering, Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. Corresponding author: fgoga@chem.ubbcluj.ro.

Keywords:

ceramic pigment nanopowders, cobalt spinels, nickel spinels, sol–gel method, sucrose, pectin

Abstract

This paper presents the results obtained through the synthesis of spinel-structured, ceramic pigment nanopowders (CoAl₂O₄ si NiAl₂O₄), using a modified sol-gel method. This study focuses on the influence of the thermal treatment, applied during gel calcination, 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 the thermal treatment, was analyzed using X-ray diffraction. The colour of the powders was characterized by UV–VIS spectroscopy, determining the absorption spectra. Additionally, the trichromatic coordinates were determined, and the corresponding pigment positions were fixed on the chromaticity diagram.

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STUDIA UBB CHEMIA, Volume 61 (LXI), No. 3, September 2016

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Published

2016-09-30

How to Cite

GOGA, F., DUDRIC, R., BIZO, L.-A. ., AVRAM, A. ., DIPPONG, T. ., KATONA, G. ., … ANTON, A. . (2016). INFLUENCE OF THE THERMAL TREATMENT ON THE COLOUR OF RO٠Al₂O₃ (R=Co, Ni) TYPE SPINEL PIGMENTS PREPARED BY A MODIFIED SOL – GEL METHOD. Studia Universitatis Babeș-Bolyai Chemia, 61(3), 263–273. Retrieved from https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8349