Fragmentation by thermal relaxation of zirconium oxide aerogel

Authors
Olivi-Tran, N Lecomte, A Lenormand, P Dauger, A
Citation
N. Olivi-tran et al., Fragmentation by thermal relaxation of zirconium oxide aerogel, J PHYS-COND, 12(34), 2000, pp. 7547-7557
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984 → ACNP
Volume
12
Issue
34
Year of publication
2000
Pages
7547 - 7557
Database
ISI
SICI code
0953-8984(20000828)12:34<7547:FBTROZ>2.0.ZU;2-1
Abstract
Zirconia aerogels are made of connected fractal clusters composed of small crystalline particles. When heated at a low temperature (i.e. 0.13 times th e melting temperature), the mass transport process which predominantly occu rs is surface diffusion. Due to the local character of surface diffusion, f ragmentation appears in the sample during thermal annealing. This particula r evolution of the structure is numerically analysed and experimentally stu died by small-angle x-ray scattering.