We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Direct Measurement of Surface Energy of CeO<sub>2</sub> by Differential Scanning Calorimetry.
- Authors
Hayun, Shmuel; Ushakov, Sergey V.; Navrotsky, Alexandra; Klimm, D.
- Abstract
Surface energy of cerium oxide was measured by differential scanning calorimetry ( DSC). Nanocrystalline CeO2 samples were synthesized by a nonaqueous sol-gel method and their surface and interfacial areas were determined from nitrogen adsorption, X-ray diffraction, and electron microscopy measurements. Three samples were repeatedly heated in a differential scanning calorimeter and the excess enthalpy was obtained from the difference in DSC traces between first heating, during which coarsening occurred, and second heating. Surface enthalpy was calculated from excess enthalpy and from changes in surface and interfacial areas. The measured surface enthalpy for CeO2, 1.2 ± 0.2 J/m2, is consistent with values from oxide melt solution calorimetry on samples with different surface areas. This is the first successful measurement of surface energy using scanning calorimetry.
- Subjects
SURFACE energy; CERIUM oxides; CALORIMETRY; NITROGEN absorption &; adsorption; X-ray diffraction; ELECTRON microscopy; CALORIMETERS; NANOCRYSTALS
- Publication
Journal of the American Ceramic Society, 2011, Vol 94, Issue 11, p3679
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2011.04843.x