Formation of alpha-Si3N4 whiskers with addition of NaN3 as catalyst

Citation
Yg. Cao et al., Formation of alpha-Si3N4 whiskers with addition of NaN3 as catalyst, J CRYST GR, 234(1), 2002, pp. 9-11
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF CRYSTAL GROWTH
ISSN journal
0022-0248 → ACNP
Volume
234
Issue
1
Year of publication
2002
Pages
9 - 11
Database
ISI
SICI code
0022-0248(200201)234:1<9:FOAWWA>2.0.ZU;2-W
Abstract
alpha -Si3N4 whiskers with diameters of about 0.1 mum and length of 3-5 mum were fabricated through combustion synthesis route under very low nitrogen pressure of 0.5-1 MPa. The measured maximum combustion temperature is abou t 1863 K which is rather lower than the adiabatic temperature (about 4400 K ) and the decomposition temperature (about 2170 K) of Si3N4 under atmospher ic pressure. The addition of NaN3 catalyst plays a key role in the formatio n of alpha -Si3N4 whiskers under such low nitrogen pressure. (C) 2002 Publi shed by Elsevier Science B.V.