A New Method for Synthesis of FeMnO₃ Ceramics and its Phase Transformation

Abstract:

FeMnO₃ powders were synthesized through a modified polyacrylamide gel route. The gel and the heat treated final powders have been characterized by X-ray diffractometry (XRD), differential scanning calorimetry and thermogravimetric analysis (TG/DSC) and field-emission scanning electron microscopy (SEM). Phase transformation sequence of dry gel during heating is (Mn⁺³,Fe⁺³)₂O₃→(α-Mn₂O₃)·(α-Fe₂O₃)→FeMnO₃. The thermal expansion properties of as-prepared sample were determined. From 100 to 700 °C, the average coefficient of expansion is 9.0139×10^-6 /K. The experimental results demonstrates that the FeMnO₃ sample exhibit a ferromagnetic transitions with T_N ≈ 40 K.

• Periodical: Journal of Nano Research (Volume 37)
• Pages: 122-131
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.37.122
• Online since: December 2015
• Authors: Zhi Jie Li, Shi Fa Wang, Bo Li, Xia Xiang*
• Keywords: FeMnO₃, Polyacrylamide Gel, Thermal Expansion

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