Firuța GOGARoxana DUDRICLiliana BIZOAlexandra AVRAMAlexandru-Horațiu MARINCAȘCsaba VARHELY Jr.Thomas DIPPONG2024-10-172017-03-30L.K.C. de Souza, J.R. Zamian, G.N. da Rocha Filho, L.E.B. Soledade, I. M.G. dos Santos, A.G. Souza, Th. Scheller, Dyes and Pigments, 2009, 81, 187. F. Goga, R. Dudric, L. Bizo, A. Avram, T. Dippong, G. Katona, G. Borodi, A. Anton, Studia UBB Chemia, 2016, 62(3), 263. I.S. Ahmed, H.A. Dessouki, A.A. Ali, Polyhedron, 2011, 30, 584. M. Gaudonn, L.C. Robertson, E. Lataste, M. Duttine, M. Ménétrier, A. Demourgues, Ceramics International, 2014, 40, 5201. H.E.H. Sadek, R.M. Khattab, A.A. Gaber, M.F. Zawrah, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014, 125, 353. E. Popovici, E. Dvininov, Nanostructured materials - nanoparticles, Ed. Demiurg Iasi, 2009, ISBN 978-973-152-001-8 I. Lazau, C. Pacurariu, Z. Ecedi, R. Ianos, Unconventional Methods Used for Oxide Compounds Synthesis, Ed. Politehnica, Timisoara, 2008. C. Suciu, A.C. Hoffman, A. Vik, F. Goga, Studia UBB Chemia, 2007, 52(2,) 3. C. Suciu, A. Vik, F. Goga, E. Dorolti, R. Teteanu, A.C. Hoffman, Studia UBB Chemia, 2009, 54(4), 262. C. Suciu, A.C. Hoffman, A. Vik, F. Goga, Chemical Engineering Journal, 2008, 138, 608. I. Lazau, C. Corcoveanu, C. Pacurariu, R.I. Lazau, Romanian Journal of Materials, 2013, (43), 425. A.B.P. Lever, Inorganic Electronic Spectroscopy, Elsevier Pub. Comp. Amsterdam, London, New York, 1968. G. Lorenzi, G. Baldi, F.D. Benedetto, V. Faso, Journal of European Ceramic Society, 2006, 26, 317. F. Iova, A. Trutia, Optical Materials, 2000, 13, 455.1224-7154(online): 2065-9520http://dspace.chem.ubbcluj.ro:4000/handle/20.500.14637/56STUDIA 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/0000-0002-4625-6525This 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.enceramic pigment nanopowdersnickel spinelssol – gel methodsucrosepectineArticle