Portal de Periódicos da CAPES

Synthesis and characterizations of microwave sintered ferrite powders and their composite films for practical applications

2011; Elsevier BV; Volume: 324; Issue: 2 Linguagem: Inglês

10.1016/j.jmmm.2011.07.050

1873-4766

Santiranjan Shannigrahi, K. P. Pramoda, Ferry Anggoro Ardy Nugroho,

Multiferroics and related materials

Phase pure single phase ferrite powders of (NixR1−x)0.5Zn0.5Fe2O4 (R=Mn, Co, Cu; x=0, 0.5) were manufactured using microwave sintering at 930 °C for 10 min in air atmosphere. The powders were characterized for their structure, microstructure, thermal, and magnetic properties. Selected powders were used as fillers to prepare their composite films using polymethyl methacrylate polymers as matrix. The composite films were prepared using the melt blending approach and were tested for their microstructure, thermal, and magnetic hysteresis loop as well as 3D magnetic field space mappings using an electromagnetic compatibility scanner. Among the studied ferrites, cobalt doped ferrites and their composites showed the best electromagnetic interference (EMI) shielding effectiveness value and have potential for practical EMI shielding applications.