Characterisation of nanocrystalline magnesium oxide by X-ray absorption spectroscopy
- Savin, Shelley L. P.
- Chadwick, Alan V.
- O'Dell, Luke A.
- Smith, Mark E.
DOIAbstract
27Al MAS NMR has been used to study a sol–gel prepared alumina annealed at various temperatures. Two-field simulation of the sample heated to 1200 °C confirmed the presence of corundum, as suggested by XRD, and also the presence of nanocrystalline θ-Al2O3. 27Al MAS NMR chemical shifts, quadrupolar coupling constants and asymmetry parameters are reported for the tetrahedral and octahedral aluminium sites within θ-Al2O3
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