On the synthesis and cation distribution of aluminum-substituted spinel-related lithium ferrite
Artykuł w czasopiśmie
| Status: | |
| Autorzy: | Widatallah Hisham M., Johnson Clive , Berry Frank John , Jartych Elżbieta, Gismelseed Abbasher M., Pękała Marek, Grabski Jan |
| Rok wydania: | 2005 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 8-9 |
| Wolumen/Tom: | 59 |
| Strony: | 1105 - 1109 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Spinel-related Al-substituted Li0.5Fe2.5O4 has been synthesized by sintering a mixture of Al-substituted corundum-related α-Fe2O3 and Li2CO3 at 700 °C which is ca. 450-500 °C lower than the temperatures normally used to prepare the material by conventional ceramic methods. The cation distribution in the material was investigated with X-ray diffraction, Mössbauer spectroscopy and magnetic measurements. Rietveld refinement of the X-ray diffraction data shows the Al3+ ions to substitute for both Fe 3+ and Li+ ions on octahedral B-sites while the displaced Li+ ions substitute for Fe3+ ones at tetrahedral A-sites. This structural model is consistent with Mössbauer and magnetic data. © 2004 Elsevier B.V. All rights reserved. |
