Synthesis and microstructural properties of mixed iron-gallium oxides
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Аутори
Krehula, Stjepko![](/themes/MirageVinar/images/orcid.png)
Ristić, Mira
![](/themes/MirageVinar/images/orcid.png)
Kubuki, Shiro
![](/themes/MirageVinar/images/orcid.png)
Iida, Yusuke
Perović, Marija M.
![](/themes/MirageVinar/images/orcid.png)
Fabian, Martin
![](/themes/MirageVinar/images/orcid.png)
Musić, Svetozar
![](/themes/MirageVinar/images/orcid.png)
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Various mixed Fe-Ga oxides were prepared by the calcination of mixed Fe-Ga oxyhydroxide precursors (alpha-Fe1 xGaxOOH solid solutions, 0 LT = x LT = 1) at 500 or 1000 degrees C. Isostructural corundum-type oxides alpha-Fe2O3 and alpha-Ga2O3, as well as their solid solutions alpha-Fe-2 xGaxO3 in the entire concentration range (x = 0, 0.4, 1, 1.6 and 2) were prepared by calcination at 500 degrees C. An increase in the Ga content in alpha-Fe2 xGaxO3 resulted in a reduction of the unit cell size, a weakened hyperfine magnetic field, a disappearance of the Morin transition, an increase of magnetization at low temperatures, a shift in the position of IR bands to higher wavenumbers, and a lower intensity of absorption bands in the UV-Vis-NIR spectra. The calcination of Fe-Ga oxyhydroxides at 1000 degrees C resulted in the formation of a rhombohedral alpha-Fe-2 xGaxO3 phase for x = 0 and 0.4. An orthorhombic GaFeO3 phase with Fe3+ cations located in 3 different octahedral sites was obtained by... the calcination at 1000 degrees C of mixed Fe-Ga oxyhydroxide with the Fe:Ga ratio of 1:1. A monoclinic phase b-Fe-2 xGaxO3 (x = 1.6 and 2) was obtained by the calcination at 1000 degrees C of Fe-Ga oxyhydroxides with 80 and 100 mol% Ga. The monoclinic beta-Ga1.6Fe0.4O3 showed two strong luminescence peaks in the blue region of the PL spectrum. (C) 2015 Elsevier B.V. All rights reserved.
Кључне речи:
Hematite / alpha-Ga2O3 / beta-Ga2O3 / GaFeO3 / Mossbauer spectroscopy / FE-SEMИзвор:
Journal of Alloys and Compounds, 2015, 634, 130-141Финансирање / пројекти:
- Croatian Centre of Excellence for Advanced Materials and Sensing Devices
DOI: 10.1016/j.jallcom.2015.02.065
ISSN: 0925-8388; 1873-4669
WoS: 000350915200022
Scopus: 2-s2.0-84923562439
Колекције
Институција/група
VinčaTY - JOUR AU - Krehula, Stjepko AU - Ristić, Mira AU - Kubuki, Shiro AU - Iida, Yusuke AU - Perović, Marija M. AU - Fabian, Martin AU - Musić, Svetozar PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/265 AB - Various mixed Fe-Ga oxides were prepared by the calcination of mixed Fe-Ga oxyhydroxide precursors (alpha-Fe1 xGaxOOH solid solutions, 0 LT = x LT = 1) at 500 or 1000 degrees C. Isostructural corundum-type oxides alpha-Fe2O3 and alpha-Ga2O3, as well as their solid solutions alpha-Fe-2 xGaxO3 in the entire concentration range (x = 0, 0.4, 1, 1.6 and 2) were prepared by calcination at 500 degrees C. An increase in the Ga content in alpha-Fe2 xGaxO3 resulted in a reduction of the unit cell size, a weakened hyperfine magnetic field, a disappearance of the Morin transition, an increase of magnetization at low temperatures, a shift in the position of IR bands to higher wavenumbers, and a lower intensity of absorption bands in the UV-Vis-NIR spectra. The calcination of Fe-Ga oxyhydroxides at 1000 degrees C resulted in the formation of a rhombohedral alpha-Fe-2 xGaxO3 phase for x = 0 and 0.4. An orthorhombic GaFeO3 phase with Fe3+ cations located in 3 different octahedral sites was obtained by the calcination at 1000 degrees C of mixed Fe-Ga oxyhydroxide with the Fe:Ga ratio of 1:1. A monoclinic phase b-Fe-2 xGaxO3 (x = 1.6 and 2) was obtained by the calcination at 1000 degrees C of Fe-Ga oxyhydroxides with 80 and 100 mol% Ga. The monoclinic beta-Ga1.6Fe0.4O3 showed two strong luminescence peaks in the blue region of the PL spectrum. (C) 2015 Elsevier B.V. All rights reserved. T2 - Journal of Alloys and Compounds T1 - Synthesis and microstructural properties of mixed iron-gallium oxides VL - 634 SP - 130 EP - 141 DO - 10.1016/j.jallcom.2015.02.065 ER -
@article{ author = "Krehula, Stjepko and Ristić, Mira and Kubuki, Shiro and Iida, Yusuke and Perović, Marija M. and Fabian, Martin and Musić, Svetozar", year = "2015", abstract = "Various mixed Fe-Ga oxides were prepared by the calcination of mixed Fe-Ga oxyhydroxide precursors (alpha-Fe1 xGaxOOH solid solutions, 0 LT = x LT = 1) at 500 or 1000 degrees C. Isostructural corundum-type oxides alpha-Fe2O3 and alpha-Ga2O3, as well as their solid solutions alpha-Fe-2 xGaxO3 in the entire concentration range (x = 0, 0.4, 1, 1.6 and 2) were prepared by calcination at 500 degrees C. An increase in the Ga content in alpha-Fe2 xGaxO3 resulted in a reduction of the unit cell size, a weakened hyperfine magnetic field, a disappearance of the Morin transition, an increase of magnetization at low temperatures, a shift in the position of IR bands to higher wavenumbers, and a lower intensity of absorption bands in the UV-Vis-NIR spectra. The calcination of Fe-Ga oxyhydroxides at 1000 degrees C resulted in the formation of a rhombohedral alpha-Fe-2 xGaxO3 phase for x = 0 and 0.4. An orthorhombic GaFeO3 phase with Fe3+ cations located in 3 different octahedral sites was obtained by the calcination at 1000 degrees C of mixed Fe-Ga oxyhydroxide with the Fe:Ga ratio of 1:1. A monoclinic phase b-Fe-2 xGaxO3 (x = 1.6 and 2) was obtained by the calcination at 1000 degrees C of Fe-Ga oxyhydroxides with 80 and 100 mol% Ga. The monoclinic beta-Ga1.6Fe0.4O3 showed two strong luminescence peaks in the blue region of the PL spectrum. (C) 2015 Elsevier B.V. All rights reserved.", journal = "Journal of Alloys and Compounds", title = "Synthesis and microstructural properties of mixed iron-gallium oxides", volume = "634", pages = "130-141", doi = "10.1016/j.jallcom.2015.02.065" }
Krehula, S., Ristić, M., Kubuki, S., Iida, Y., Perović, M. M., Fabian, M.,& Musić, S.. (2015). Synthesis and microstructural properties of mixed iron-gallium oxides. in Journal of Alloys and Compounds, 634, 130-141. https://doi.org/10.1016/j.jallcom.2015.02.065
Krehula S, Ristić M, Kubuki S, Iida Y, Perović MM, Fabian M, Musić S. Synthesis and microstructural properties of mixed iron-gallium oxides. in Journal of Alloys and Compounds. 2015;634:130-141. doi:10.1016/j.jallcom.2015.02.065 .
Krehula, Stjepko, Ristić, Mira, Kubuki, Shiro, Iida, Yusuke, Perović, Marija M., Fabian, Martin, Musić, Svetozar, "Synthesis and microstructural properties of mixed iron-gallium oxides" in Journal of Alloys and Compounds, 634 (2015):130-141, https://doi.org/10.1016/j.jallcom.2015.02.065 . .