PREPARATION OF ALUMINA-ZIRCONIA DISPERSIO NS BY REACTIONS IN MOLTEN NITRATES AND CHARACTERIZATION

Authors
JEBROUNI M DURAND B ROUBIN M SAIKALI Y
Citation
M. Jebrouni et al., PREPARATION OF ALUMINA-ZIRCONIA DISPERSIO NS BY REACTIONS IN MOLTEN NITRATES AND CHARACTERIZATION, Annales de chimie, 19(2), 1994, pp. 55-65
Citations number
9
Categorie Soggetti
Chemistry,"Material Science
Journal title
Annales de chimie → ACNP
ISSN journal
01519107
Volume
19
Issue
2
Year of publication
1994
Pages
55 - 65
Database
ISI
SICI code
0151-9107(1994)19:2<55:POADNB>2.0.ZU;2-A
Abstract
Simultaneous reactivity of zirconium oxychloride and of an aluminium s alt, chloride or nitrate, with molten alkali nitrates leads at 450-deg rees-C to alumina-zirconia dispersions. Zirconia is present in the sha pe of agglomerates constituted of nano-sized crystallites giving to th e powder a large specific surface area. Alumina particles exhibit a di fferent microstructure, They delay the growth of tetragonal zirconia c rystallites and consequently stabilize the tetragonal variety.