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 Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. https://orcid.org/0000-0001-8367-7874
  • Roxana DUDRIC Faculty of Physics, Babeş-Bolyai University, Cluj-Napoca, Romania. https://orcid.org/0000-0002-4123-0801
  • Liliana BIZO Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. https://orcid.org/0000-0002-8775-8492
  • Alexandra AVRAM Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. *Corresponding author: aavram@chem.ubbcluj.ro
  • Thomas DIPPONG Department of Chemistry and Biology, Faculty of Sciences, Baia Mare Branch, Technical University, Cluj-Napoca, Romania. https://orcid.org/0000-0002-4625-6525
  • Gabriel KATONA Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania. https://orcid.org/0000-0003-3508-0023
  • Gheorghe BORODI National Institute for Research and Development of Isotopic and Molecular Technologies, nr. 103, 67 Donath Street, Cluj-Napoca RO-400293, Cluj-Napoca, Romania. https://orcid.org/0000-0003-4915-4169
  • Andreea ANTON Faculty of Chemistry and Chemical Engineering, Babeş-Bolyai University, Cluj-Napoca, Romania.

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., 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

Issue

Volume 61, No. 3, Tome I, 2016

Section

Articles

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Copyright (c) 2016 Studia Universitatis Babeș-Bolyai Chemia

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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