Widatallah, H.M.; Johnson, C.; Berry, Frank; Jartych, E.; Gismelseed, A.M.; Pekala, M. and Grabski, J.
(2005).
On the synthesis and cation distribution of aluminum-substituted spinel-related lithium ferrite.
Materials Letters, 59(8-9)
pp. 1105–1109.
Abstract
Spinel-related Al-substituted Li0.5Fe2.5O4 has been synthesized by sintering a mixture of Al-substituted corundum-related alpha-Fe2O3 and Li2CO3 at 700 degreesC which is ca. 450-500 degreesC 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, Mossbauer spectroscopy and magnetic measurements. Rietveld refinement of the X-ray diffraction data shows the Al3+ ions to substitute for both Fe3+ 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 Mossbauer and magnetic data.
| Item Type: |
Journal Article
|
| ISSN: |
0167-577X |
| Extra Information: |
Some of the symbols may not have transferred correctly into this bibliographic record and/or abstract. |
| Keywords: |
Ceramics; Sintering; X-ray diffraction; Mössbauer spectroscopy |
| Academic Unit/Department: |
Science > Life, Health and Chemical Sciences |
| Item ID: |
5740 |
| Depositing User: |
David Shuker
|
| Date Deposited: |
09 Nov 2006 |
| Last Modified: |
02 Dec 2010 19:54 |
| URI: |
http://oro.open.ac.uk/id/eprint/5740 |
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