Abstract
We have measured Raman spectra of samples of natural MgAl2O 4 spinel before and after annealing at different temperatures and quenching. The appearance of 727cm-1 mode in the samples annealed at 800°C or higher is believed to be due to the cation-disorder of spinel. The full-width-at-the-half-maximum (FWHM) values of the 410cm-1 mode as a function of the annealing temperature clearly shows an abrupt increase at the temperature between 700 and 750°C as the annealing temperature increases. Thus, we find the annealing temperature at which the cation-disorder occurred in the natural MgAl2O4 spinel to be between 700 and 750°C.
Original language | English |
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Pages (from-to) | 93-96 |
Number of pages | 4 |
Journal | Vibrational Spectroscopy |
Volume | 35 |
Issue number | 1-2 |
DOIs | |
State | Published - 17 Jun 2004 |
Event | The 2nd International Conference on Advanced Vibrational Spectroscopy - Nottingham, United Kingdom Duration: 24 Aug 2003 → 29 Aug 2003 |
Bibliographical note
Funding Information:We wish to thank Luc Huy Hoang and Nguyen The Khoi for their X-ray diffraction measurements. We thank Korea Research Foundation Grant KRF-2000-015-DS0014 for financial support.
Keywords
- Cation-disorder
- MgAlO
- Raman study