Skip to Main content Skip to Navigation
Journal articles

Thermoluminescence and sintering of high-purity α-alumina doped by Zr, Th and Ca

Abstract : Two parameters were studied upon the thermoluminescence (TL) properties and the sintering behaviour of α-alumina: the atmosphere during the heat treatment used to transform γ-Al2O3 into α-Al2O3 and the doping by Zr and Th. It appears that a reducing atmosphere tends to delay the sintering compared with the oxidising atmosphere until 1600°C. Above this temperature, the shrinkage starts again, which is attributed to a change in the mechanism of sintering of α-Al2O3. The concentration of point defects created through charge compensation as the tetravalent dopant integrates into the host material increases until the solubility's limit of the dopant in alumina is reached. Above this concentration, the peaks on the TL glow curves stabilize, and the specific area of the powders stabilizes at its higher value. As a consequence, the final densities obtained for α-Al2O3:Th and α-Al2O3:Zr are the best when the solubility's limit of the dopant in alumina is reached.
Document type :
Journal articles
Complete list of metadatas

Cited literature [4 references]  Display  Hide  Download

https://hal-emse.ccsd.cnrs.fr/emse-00527285
Contributor : Andrée-Aimée Toucas <>
Submitted on : Monday, November 29, 2010 - 9:25:46 PM
Last modification on : Wednesday, June 24, 2020 - 4:18:31 PM
Document(s) archivé(s) le : Thursday, December 1, 2016 - 8:15:51 PM

File

FF-SSI-141-original.pdf
Files produced by the author(s)

Identifiers

Citation

Frédérique Ferey, Philippe Grosseau, Bernard Guilhot, Philibert Iacconi, Mourad Benabdesselam. Thermoluminescence and sintering of high-purity α-alumina doped by Zr, Th and Ca. Solid State Ionics, Elsevier, 2001, 141-142, pp.567-574. ⟨10.1016/S0167-2738(01)00766-4⟩. ⟨emse-00527285⟩

Share

Metrics

Record views

358

Files downloads

757