FORMATION OF IRON-OXIDE FILMS FROM STABILIZED MAGNETITE SOLS - MAGNETIC LIQUIDS

Authors
MALCHENKO SN GOROSHKO NN BAIKOV MV CHUDAKOV VA ERMOLENKO VI
Citation
Sn. Malchenko et al., FORMATION OF IRON-OXIDE FILMS FROM STABILIZED MAGNETITE SOLS - MAGNETIC LIQUIDS, Thin solid films, 227(2), 1993, pp. 128-132
Citations number
23
Categorie Soggetti
Physics, Applied","Material Science","Physics, Condensed Matter
Journal title
Thin solid films → ACNP
ISSN journal
00406090
Volume
227
Issue
2
Year of publication
1993
Pages
128 - 132
Database
ISI
SICI code
0040-6090(1993)227:2<128:FOIFFS>2.0.ZU;2-D
Abstract
Formation of thin supported iron oxide films from oleic acid stabilize d Fe3O4 sols in decane medium has been studied using thermogravimetry, X-ray and electron diffraction, transmission electron microscopy, Mos sbauer spectroscopy and chemical analysis. The continuous transparent films prepared by casting the sols over a flat substrate with subseque nt heating in the air at 420-820 K were from 50-60 nm up to 1.5 mum th ick, consisting of colloid-size particles. Intensive particle growth h as been observed only above 670 K after complete removal of the disper sion medium and the stabilizer. The films had a crystal structure of m agnetite on heating below 570 K, gamma-Fe2O3 between 620 and 670 K and alpha-Fe2O3 above 670 K.