Microwave-assisted solution combustion synthesis of Fe3O4 powders
Source abstract
Abstract
Abstract Magnetite (Fe 3 O 4 ) powders were synthesized by solution combustion method at different fuel to oxidant ratios (ϕ = 0.5, 0.75, 1 and 1.5) using conventional and microwave ignition. The ignition method and fuel content affected the phase evolution, microstructure and magnetic properties of Fe 3 O 4 powders as characterized by X-ray diffractometry, infrared spectroscopy, N 2 adsorption–desorption, electron microscopy and vibrating sample magnetometry techniques. Single phase Fe 3 O 4 powders were only obtained using conventional ignition at ϕ value of 1, while the impurity phases such as α-Fe 2 O 3 and FeO together with Fe 3 O 4 phase were formed by microwave ignition. The bulky microstructure of conventionally combusted powders with specific surface area of 71.5 m 2 /g was transformed to disintegrated structure (76.5 m 2 /g) by microwave heating. The microwave combusted powders showed the highest saturation magnetization of 86.5 emu/g at ϕ value of 0.5 and the lower coercivity than that of conventionally combusted powders at all ϕ values, due to their larger particles.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Iron oxide chemistry and applications · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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