Article Dans Une Revue Journal of the American Ceramic Society Année : 1985

Study by Extended X‐ray Absorption Fine‐Structure Technique and Microscopy of the Chemical State of Yttrium in α‐Polycrystalline Alumina

Résumé

Yttrium‐doped a‐poly crystalline alumina was studied by microscopy observations and by extended X‐ray absorption fine‐structure experiments. The latter results were compared to those obtained for a standard Y 2 O 3 powder and to theoretical spectra for Y 2 O 3 , and Y 3 Al 5 O 12 calculated on the basis of crystallographic data. Most of the yttrium in the doped alumina is precipitated as a Y 3 Al 5 O 12 phase. An observed threshold displacement involves a slight valence electron delocalization for the Y 3+ ion.

Domaines

Chimie

Dates et versions

hal-04664641 , version 1 (30-07-2024)

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Citer

M.K. Loudjani, J. Roy, A.M. Huntz, Robert Cortès. Study by Extended X‐ray Absorption Fine‐Structure Technique and Microscopy of the Chemical State of Yttrium in α‐Polycrystalline Alumina. Journal of the American Ceramic Society, 1985, 68 (11), pp.559-562. ⟨10.1111/j.1151-2916.1985.tb16155.x⟩. ⟨hal-04664641⟩
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