【摘 要】
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Nanoparticles of potassium ferrite (KFeO2) in this work were synthesized by a simple egg white solution method upon calcination in air at 773, 873, and 973 K for 2 h. The effects of calcination temperature on the structural and magnetic properties of the
【机 构】
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School of Physics,Institute of Science,Suranaree University of Technology,Nakhon Ratchasima,30000,Th
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Nanoparticles of potassium ferrite (KFeO2) in this work were synthesized by a simple egg white solution method upon calcination in air at 773, 873, and 973 K for 2 h. The effects of calcination temperature on the structural and magnetic properties of the synthesized KFeO2 nanoparticles were investigated. By varying the calcination temperature, X-ray diffraction and transmission electron microscopy results indic-ated the changes in crystallinity and morphology including particle size, respectively. Notably, the reduction in particle size of the synthesized KFeO2 was found to have a remarkable influence on the magnetic properties. At room temperature, the synthesized KFeO2 nanoparticles pre-pared at 873 K exhibited the highest saturation magnetization (MS) of 2.07 × 104 A·m?1. In addition, the coercivity (HC) increased from 3.51 to 16.89 kA·m?1 as the calcination temperature increased to 973 K. The zero-field cooled (ZFC) results showed that the blocking temperatures (TB) of about 125 and 85 K were observed in the samples calcined at 773 and 873 K, respectively. Therefore, this work showed that the egg white solution method is simple, cost effective, and environmentally friendly for the preparation of KFeO2 nanoparticles.
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