Szczegóły publikacji
Opis bibliograficzny
Investigation of thermal decomposition of $CrO_{x} (x\geq 2.4)$ / S. ŁABUŚ, A. MAŁECKI, R. GAJERSKI // Journal of Thermal Analysis and Calorimetry ; ISSN 1388-6150. — Tytuł poprz.: Journal of Thermal Analysis ; ISSN: 0368-4466. — 2003 — vol. 74 iss. 1, s. 13–20. — Bibliogr. s. 20, Abstr.
Autorzy (3)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 14657 |
|---|---|
| Data dodania do BaDAP | 2003-11-26 |
| Tekst źródłowy | URL |
| DOI | 10.1023/A:1026309315556 |
| Rok publikacji | 2003 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Thermal Analysis and Calorimetry |
Abstract
The phase transitions and thermal effects occurring during annealing in air of material with general formula CrOx (xgreater than or equal to2.4) have been investigated. The investigations were performed with TG, DTA, DSC, EGA, XRD and other spectral techniques. The formation of an amorphous phase with average composition Cr5O12 in the range 300-400degreesC has been observed. Further heating leads to partial loss of oxygen, simultaneous decay of Cr2O5 and CrO2 phases and formation of nonstoichiometric Cr2O3+x. The distinct loss of mass is observed in the range 415-428degreesC, connected with evolving oxygen and small amount of nitric oxides. Thermal effects accompanying the mass changes depend on the mass of the sample. When the mass decreases, the transition from exothermic to endothermic effects is observed. This phenomenon can be explained as the competition between two processes: reconstruction of the crystalline lattice (endothermic effect) and recombination of the evolved atomic oxygen (exothermic effect).
