Приказ основних података о документу
Mechanochemical treatment of alpha-Fe2O3 powder in air atmosphere
dc.creator | Zdujić, Miodrag | |
dc.creator | Jovalekić, Čedomir | |
dc.creator | Karanović, Ljiljana | |
dc.creator | Mitrić, Miodrag | |
dc.creator | Poleti, Dejan | |
dc.creator | Skala, Dejan | |
dc.date.accessioned | 2018-03-01T18:33:10Z | |
dc.date.available | 2018-03-01T18:33:10Z | |
dc.date.issued | 1998 | |
dc.identifier.issn | 0921-5093 | |
dc.identifier.uri | https://vinar.vin.bg.ac.rs/handle/123456789/2143 | |
dc.description.abstract | Powder of alpha-Fe2O3 was mechanochemically treated in a planetary ball mill in an air atmosphere. Structural changes were followed by X-ray diffraction analysis, magnetization measurements and differential scanning calorimetry after various milling times. It was found that complete transformation of alpha-Fe2O3 to Fe3O4 is possible during milling in an air atmosphere under appropriate milling conditions. Presumably, the decrease in the oxygen partial pressure during milling has a critical influence on promoting the dissociation of alpha-Fe2O3. Before nucleation of the Fe3O4 phase, the crystallites of the alpha-Fe2O3 phase are reduced to a minimal size accompanied by the introduction of atomic-level strain. Local modeling of a collision event, coupled with a classical thermodynamic assessment of the Fe2O3-Fe3O4 system, were used to rationalize the experimental results. It is proposed that the mechanochemical reactions proceed at the moment of impact by a process of energization and freezing of highly localized sites of a short lifetime. Excitation on a time scale of similar to 10(-5) s corresponds to a temperature rise of the order of (1-2) x 10(3) K. Decay of the excited state occurs rapidly at a mean cooling rate higher than 10(6) K s(-1). (C) 1998 Elsevier Science S.A. All rights reserved. | en |
dc.relation | Ministry of Science and Technology of the Republic of Serbia | |
dc.rights | restrictedAccess | en |
dc.source | Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing | en |
dc.subject | hematite | en |
dc.subject | magnetite | en |
dc.subject | ball milling | en |
dc.title | Mechanochemical treatment of alpha-Fe2O3 powder in air atmosphere | en |
dc.type | article | en |
dc.rights.license | ARR | |
dcterms.abstract | Јовалекиц, Ц; Полети, Д; Скала, Д; Здујиц, М; Карановиц, Л; Митрић Миодраг; | |
dc.citation.volume | 245 | |
dc.citation.issue | 1 | |
dc.citation.spage | 109 | |
dc.citation.epage | 117 | |
dc.identifier.wos | 000073504100013 | |
dc.identifier.doi | 10.1016/S0921-5093(97)00715-6 | |
dc.citation.rank | M22 | |
dc.type.version | publishedVersion | |
dc.identifier.scopus | 2-s2.0-0000353363 |