Effect of Sintering Aid on Synthesis and Magnetic Properties of Nanocrystalline BaFe₁₂O₁₉ Ceramic Foam

Abstract:

BaFe₁₂O₁₉ ceramic foam was synthesized from the mixture of Fe₂O₃ and BaCO₃ using polymeric sponge replication technique. Effect of 1, 1.5, 2, 2.5, and 3 wt.% of SiO₂ addition on foam lattice shape and magnetic properties of foams were investigated. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating samplemagnetometer (VSM) and Brunauer–Emmett–Teller (BET) techniques.Addition of 3 wt.% SiO₂ can completely maintain the foam lattice shape at lower calcination temperature of 1075 °C. It resulted in higher values of coercivity and saturation magnetization. Moreover, BET analysis of the foam sample with 3 wt.% SiO2 demonstrate a specific surface area of 0.3 m²g^-1.

• Periodical: Advanced Materials Research (Volumes 622-623)
• Pages: 980-984
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.622-623.980
• Online since: December 2012
• Authors: Saeed Jafari, A. Ataie, Amin Nozari
• Keywords: BaFe₁₂O₁₉, Ceramic Foam, SiO₂

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