Manganese Ferrite Containing Glass-Crystalline Materials—Phase Composition, Microstructure and Magnetic Properties.
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| Title: | Manganese Ferrite Containing Glass-Crystalline Materials—Phase Composition, Microstructure and Magnetic Properties. |
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| Authors: | Takov, Petar1 (AUTHOR), Harizanova, Ruzha1,2 (AUTHOR) rharizanova@uctm.edu, Mihailova, Irena2,3 (AUTHOR), Bancheva-Koleva, Pavlina1,4 (AUTHOR), Avdeev, Georgi3,5 (AUTHOR), Paneva, Daniela4,6 (AUTHOR), Cherkezova-Zheleva, Zara1,4 (AUTHOR), Georgieva, Milena2,5 (AUTHOR), Karadimov, Todor3,5 (AUTHOR), Rüssel, Christian4,6 (AUTHOR) |
| Source: | Materials (1996-1944). May2026, Vol. 19 Issue 9, p1771. 18p. |
| Subjects: | Ferrites, Magnetic properties, Solidification, Composite materials, Ferrimagnetism, Microstructure, Glass chemistry |
| Abstract: | Highlights: What are the main findings? New glass-crystalline magnetic materials are synthesized in the system Na2O-MnO-SiO2-Fe2O3. The spinel phase MnxFe1−xO4 precipitates. Iron occurs in both the glass and the crystals as Fe2+ and Fe3+. What are the implications of the main findings? It is proved that the proposed set of compositions allows the preparation of glasses for up to 15 mol% Fe2O3 and spontaneous crystallization occurs for 20 and 25 mol% Fe2O3. The compositions chosen and the method of melt-quenching enable preparation of materials with high degree of crystallinity and uniform bulk crystallization. Soft ferrimagnetic materials with relatively high saturation magnetization and potential for application in electronics are obtained. The preparation of new magnetic materials is important because of their potential application in various electronic components. In the present work, the synthesis of glass-crystalline materials in the system Na2O-MnO-SiO2-Fe2O3 prepared by applying melt-quenching is reported. The phase composition as studied by X-ray diffraction and Raman spectroscopy reveals the precipitation of monophase MnxFe3−xO4 based solid solutions. The microstructure is studied by scanning electron and optical microscopy and shows bulk crystallization and the presence of polygon-shaped as well as of dendritic crystals, depending on the iron oxide concentration and used raw materials. Mössbauer spectra show that in the amorphous matrix the Fe ions are mainly present as Fe3+ in tetrahedral coordination and as Fe3+ in a solid solution with the composition MnxFe3−xO4. The simultaneous presence of MnFe2O4 (jacobsite) and a Mn-containing solid solution based on Fe3O4 (magnetite) is suggested. The room temperature magnetic properties were studied by vibrating sample magnetometer and reveal ferrimagnetic properties for all investigated glass-crystalline materials. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Highlights: What are the main findings? New glass-crystalline magnetic materials are synthesized in the system Na2O-MnO-SiO2-Fe2O3. The spinel phase MnxFe1−xO4 precipitates. Iron occurs in both the glass and the crystals as Fe2+ and Fe3+. What are the implications of the main findings? It is proved that the proposed set of compositions allows the preparation of glasses for up to 15 mol% Fe2O3 and spontaneous crystallization occurs for 20 and 25 mol% Fe2O3. The compositions chosen and the method of melt-quenching enable preparation of materials with high degree of crystallinity and uniform bulk crystallization. Soft ferrimagnetic materials with relatively high saturation magnetization and potential for application in electronics are obtained. The preparation of new magnetic materials is important because of their potential application in various electronic components. In the present work, the synthesis of glass-crystalline materials in the system Na2O-MnO-SiO2-Fe2O3 prepared by applying melt-quenching is reported. The phase composition as studied by X-ray diffraction and Raman spectroscopy reveals the precipitation of monophase MnxFe3−xO4 based solid solutions. The microstructure is studied by scanning electron and optical microscopy and shows bulk crystallization and the presence of polygon-shaped as well as of dendritic crystals, depending on the iron oxide concentration and used raw materials. Mössbauer spectra show that in the amorphous matrix the Fe ions are mainly present as Fe3+ in tetrahedral coordination and as Fe3+ in a solid solution with the composition MnxFe3−xO4. The simultaneous presence of MnFe2O4 (jacobsite) and a Mn-containing solid solution based on Fe3O4 (magnetite) is suggested. The room temperature magnetic properties were studied by vibrating sample magnetometer and reveal ferrimagnetic properties for all investigated glass-crystalline materials. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961944 |
| DOI: | 10.3390/ma19091771 |
