MECHANISM OF FORMATION OF NANOCRYSTALLINE HEMATITE PREPARED BY FREEZE-DRYING

Authors
BERMEJO E DANTAS T LACOUR C
Citation
E. Bermejo et al., MECHANISM OF FORMATION OF NANOCRYSTALLINE HEMATITE PREPARED BY FREEZE-DRYING, Materials research bulletin, 30(5), 1995, pp. 645-652
Citations number
9
Categorie Soggetti
Material Science
Journal title
Materials research bulletin → ACNP
ISSN journal
00255408
Volume
30
Issue
5
Year of publication
1995
Pages
645 - 652
Database
ISI
SICI code
0025-5408(1995)30:5<645:MOFONH>2.0.ZU;2-A
Abstract
In order to elucidate the mechanism of the elaboration of raw material s by freeze-drying, a characterization of alpha-Fe2O3 freeze-dried pow ders has been undertaken during the main phases of the preparation. Th e freezing of the salt solution and the salt solidification in amorpho us form govern mainly the properties of the produced powder -ultrafine , pure and highly reactive particles- and its thermal behaviour. The u sefulness of such unconventional process is the lowering of temperatur e of chemical reactions involving alpha-Fe2O3.