Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1459 - C7-1462
DOI http://dx.doi.org/10.1051/jp4:19937227
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1459-C7-1462

DOI: 10.1051/jp4:19937227

Processing of submicron a-alumina powders doped with Mg-physical and chemical characterization

M. FILAL, D. MONCEAU, G. PETOT-ERVAS, C. PETOT and J.G. ZAO

CNRS-LPCM/UPR-211, Université Paris XIII, 93430 Villetaneuse, France


Abstract
This work examines the influence of the thermal treatment conditions at T > 1150°C, on the microstructure and microchemistry of submicron a-alumina powders doped with '500 and 1650 ppm by weight of MgO. The powders have been characterized by XPS, TEM, SEM, BET surface area measurements and chemical analysis. Quantitative XPS analysis show a strong segregation of Mg at the near surface of the grains. The determining factor is the size of the grains and it has been possible to relate the amount of Mg at the periphery of the grains to the BET surface area measurements.



© EDP Sciences 1993