Oxidation behavior and mechanism of pentlandite at 973 K (700 °C) in air
Article
Article Title | Oxidation behavior and mechanism of pentlandite at 973 K (700 °C) in air |
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ERA Journal ID | 4730 |
Article Category | Article |
Authors | Zhu, Huihui (Author), Chen, Jun (Author), Deng, Jinxia (Author), Yu, Ranbo (Author) and Xing, Xianran (Author) |
Journal Title | Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science |
Journal Citation | 43 (3), pp. 494-502 |
Number of Pages | 9 |
Year | 2012 |
Place of Publication | United States |
ISSN | 1073-5615 |
1543-1916 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11663-011-9630-2 |
Web Address (URL) | https://link.springer.com/article/10.1007%2Fs11663-011-9630-2 |
Abstract | The oxidation behavior of synthetic pentlandite at 973 K (700 °C) under isothermal conditions was investigated. The pentlandite sample (Ni,Fe)9S8 was synthesized from pure components and oxidized at 973 K (700 °C) in air in a muffle furnace. The phase identification and components analysis of the oxidation products were performed by using the Rietveld quantitative analysis method based on the powder X-ray diffraction (XRD) profiles and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX). The magnetic hysteresis loops were determined by a vibrating sample magnetometer. Fe 2O 3, NixFe 3-xO 4, and NiO were dominant oxidation products, and their weight fractions changed in different ways along with the oxidation time. The nickel-rich phase and sulfur-rich phase were observed as intermediate phases in unreacted cores during oxidation, which led to the formation of gaps and holes. The oxidation reaction rate was rapid in the first 2 hours, and then it slowed down sharply. |
Keywords | Energy dispersive x-ray spectroscopy; Intermediate phasis; Isothermal conditions; Muffle furnaces; Oxidation behaviors; Oxidation products; Oxidation reactions; Oxidation time; Phase identification; Powder X ray diffraction; Pure components; Rietveld; SEM-EDX; Unreacted cores; Vibrating sample magnetometer; Weight fractions; Light and Optics; Chemistry; Chemical Reactions; |
ANZSRC Field of Research 2020 | 401901. Electrometallurgy |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Science and Technology Beijing, China |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4289/oxidation-behavior-and-mechanism-of-pentlandite-at-973-k-700-c-in-air
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