MORPHOLOGICAL INVESTIGATIONS ON IRON POTASSIUM SULFIDE KFES2 - GRINDING EFFECT ON THERMAL-BEHAVIOR

Authors
GALEMBECK A ALVES OL
Citation
A. Galembeck et Ol. Alves, MORPHOLOGICAL INVESTIGATIONS ON IRON POTASSIUM SULFIDE KFES2 - GRINDING EFFECT ON THERMAL-BEHAVIOR, Materials letters, 23(1-3), 1995, pp. 133-138
Citations number
21
Categorie Soggetti
Material Science","Physics, Applied
Journal title
Materials letters → ACNP
ISSN journal
0167577X
Volume
23
Issue
1-3
Year of publication
1995
Pages
133 - 138
Database
ISI
SICI code
0167-577X(1995)23:1-3<133:MIOIPS>2.0.ZU;2-S
Abstract
FeS2 (pyrite form), K2SO4, K3Fe(SO4)(3) and alpha-Fe2O3 are the produc ts of thermal decomposition of crystalline KFeS2, from room temperatur e up to 1000 degrees C, in air. Grinding of iron potassium sulfide pri or to heating leads to a modified reaction pattern; the decomposition products are the same, but their formation temperatures are considerab ly lower than in the case of the unground crystals. Morphological feat ures of the thermal reaction products are also considerably modified b y KFeS2 grinding.