| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1523107 | Materials Chemistry and Physics | 2012 | 7 Pages |
Abstract
⺠Sol-gel derived spinel-type CoAl2O4 thermal evolution was monitored. ⺠Below 700 °C part of Co exists in 3+ state (octahedral sites), yielding green color. ⺠Above 700 °C Co3+ reduction to Co2+ (tetrahedral sites) is promoted, changing to blue. ⺠Treatment at 500-600 °C resulted in crystal spinel-type phase Co2AlO4. ⺠At 700-900 °C Co2AlO4 and amorphous alumina react, producing CoAl2O4.
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Authors
S. Kurajica, J. PopoviÄ, E. TkalÄec, B. Gržeta, V. MandiÄ,