The Mechanisms of Nickel-Iron Spinel Phase Nucleation in Aquous Solutions: Crystal Quasichemical Approach
| Autor: | B. Dzundza, V. Bojchuk, O. Khatsevych, V.O. Kotsyubynsky, Kh. V. Bandura, M. Hodlevska |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Spinel Nucleation engineering.material Condensed Matter Physics lcsh:QC1-999 defect nickel-iron spinel Partial charge Lattice constant Electrical resistivity and conductivity Phenomenological model lattice parameter engineering Physical chemistry General Materials Science Physical and Theoretical Chemistry optical spectroscopy Spectroscopy hydroxocomplex lcsh:Physics Stoichiometry |
| Zdroj: | Фізика і хімія твердого тіла, Vol 20, Iss 2, Pp 156-164 (2019) |
| ISSN: | 2309-8589 1729-4428 |
| DOI: | 10.15330/pcss.20.2.156-164 |
| Popis: | The phenomenological model of nikel-iron spinel nucleation with spinel structure based on the partial charge theory and analysis of hydrolysis and polycondensation processes at the interaction of Fe3+-, Fe2+- and Ni2+- hydroxocomplexes at different pH values of reaction medium was proposed. UV-vis optical spectroscopy was used for verification of the obtained results about the regularities of hydroxocomplexes formation. Crystal quasichemistry approach was applied for nucleation of nikel-iron spinel under the conditions of predomination of different defect types in NixFe3-xO4-δ (d is oxygen non-stoichiometry) spinel lattice. The analysis of changes in electrical conductivity and lattice parameter of defect nickel-iron spinel as a function of Ni2+ atomic concentration was done for different values of d parameter. |
| Databáze: | OpenAIRE |
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