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Ga-Substituted Cobalt-Chromium Spinels as Ceramic Pigments Produced by Sol–Gel Synthesis
Department of Detailed Research, Cultural Heritage Centre, Asmenos 10, 01135 Vilnius, Lithuania. Institute of Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0003-3283-9313
Institute of Chemistry, Vilnius University, Naugarduko 24, 03225 Vilnius, Lithuania.
SRI Nature Research Centre, Institute of Geology and Geography, Akademijos 2, 08412 Vilnius, Lithuania.
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2020 (English)In: Crystals, ISSN 2073-4352, Vol. 10, no 12, article id 1078Article in journal (Refereed) Published
Abstract [en]

For the first time to the best of our knowledge, cobalt-chromium spinels CoCr2−xGaxO4 with different amounts of gallium (x = 0–2 with a step of 0.5) were synthesized via the aqueous sol–gel route as ceramic pigments. The phase composition, crystallite size, morphological features, and color parameters of new compositions and their corresponding ceramic glazes were investigated using XRD, CIELab, SEM, and optical microscopy. It was demonstrated that the formation of single-phase CoCr2−xGaxO4 samples was problematic. Full substitution of Cr3+ by Ga3+ ion in the spinel resulted in the formation of light blue powders, which yielded violetish blue color for the corresponding ceramic glaze.

Place, publisher, year, edition, pages
MDPI, 2020. Vol. 10, no 12, article id 1078
Keywords [en]
sol–gel processing, cobalt chromite, mixed-metal oxides, gallium substitution, ceramic pigments
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-81579DOI: 10.3390/cryst10121078ISI: 000602019800001Scopus ID: 2-s2.0-85096642278OAI: oai:DiVA.org:ltu-81579DiVA, id: diva2:1503349
Projects
FORMAS "Utilization of solid inorganic waste from the aquaculture industry as wood reinforcement material for flame retardancy 2018-01198"
Note

Validerad;2020;Nivå 2;2020-12-07 (alebob)

Available from: 2020-11-24 Created: 2020-11-24 Last updated: 2021-01-14Bibliographically approved

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Garskaite, Edita

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