Solid-gas reaction during sintering of Si3N4 ceramics (part 7) - Temperature dependence of mass loss of sintered Si3N4 ceramics during heat treatment

Citation
T. Hattori et al., Solid-gas reaction during sintering of Si3N4 ceramics (part 7) - Temperature dependence of mass loss of sintered Si3N4 ceramics during heat treatment, J CERAM S J, 109(11), 2001, pp. 960-962
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
ISSN journal
0914-5400 → ACNP
Volume
109
Issue
11
Year of publication
2001
Pages
960 - 962
Database
ISI
SICI code
0914-5400(200111)109:11<960:SRDSOS>2.0.ZU;2-R
Abstract
The relationship between mass loss of Si3N4 ceramics during heat treatment and heat treatment temperature was quantitatively examined to elucidate the rate-determining factor of mass loss. Sintered Si3N4 ceramics were heat-tr eated at 1823-2098 K under 0.1 MPa N-2 and mass loss during heat treatment was measured. The mass loss increased with increasing temperature and the s lope of the Arrhenius plot of the mass loss rate was similar to that of the equilibrium gas pressure of SiO generated from the mass loss reaction of S i3N4 ceramics. This finding suggests that the rate-determining factor of ma ss loss is the diffusion rate of SiO to the outside of the sagger.