Effects of Milling Time and Annealing Schedule on Mechanical Activation Synthesis of Brownmillerite Structural Ca₂Fe₂O₅

Abstract:

The brownmillerite structural Ca₂Fe₂O₅ is successfully prepared by high energy milling starting from CaCO₃ and Fe₂O₃. The composition and transformation of phase and structure with different milling time and annealed at 800 °C for 24 h were characterized by the X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) analysis. The results indicate that the high pure brownmillerite structural Ca₂Fe₂O₅ could be efficiently synthesized at lower temperature by the mechanically activated mixtures.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 1099-1102
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.1099
• Online since: July 2011
• Authors: Fen Wang, Chun Zhao, Jian Feng Zhu
• Keywords: Brownmillerite, Ca₂Fe₂O₅, High Energy Milling, Oxygen-Deficient Perovskite

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