Pattanayak, J and Rao, V S and Maiti, Himadri Sekhar (1990) Effect of iron concentration on the thermal-behavior of gamma-Mn2O3. Thermochimica Acta, 160 (2). pp. 233-242. ISSN 0040-6031

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Samples of y-Mn,O, with various iron contents are obtained by co-precipitation from appropriate amounts of manganese sulphate and ferric nitrate solutions by a concentrated (2.5 N) boiling solution of sodium hydroxide. Thermal analysis, X-ray diffraction and IR spectroscopy of the specimens reveal that the presence of iron in y-MnrO, up to 15 to 25 at.% leads to formation of a single phase y-Mn,O, solid solution, which is partly reduced to Mn,O, around 680°C and finally transforms to the a-Mn203 phase on heating at or above 950°C. With increasing iron concentration beyond 25 at.%, the formation of a ferrite phase has been detected in addition to the y-Mn203 solid solution. However, this ferrite phase is thermally unstable and breaks down on heating around 600 o C.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 02 Mar 2016 09:41
Last Modified: 15 May 2016 13:28

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