TITLE:
Microwave Sintering of Zn-Nb Doped Barium Hexaferrite Synthesized via Sol-Gel Method
AUTHORS:
Samikannu Kanagesan, Mansor Hashim, Sinnappan Jesurani, Thirunavukarasu Kalaivani, Ismayadi Ismail
KEYWORDS:
Ceramics; Magnetic Materials; Surface Properties; Magnetic Properties
JOURNAL NAME:
Materials Sciences and Applications,
Vol.5 No.4,
March
25,
2014
ABSTRACT: A series of polycrystalline M-type hexagonal ferrites with the formula BaFe12-2xZnx NbxO19 (x = 0.2, 0.4, 0.6, 0.8 mol%) have been synthesized by the sol-gel method. The composition and microstructure govern the magnetic properties of ferrites. The XRD analysis shows the formation of pure magneto plumbite phase without any other impurity phases. The Zn-Nb substitutions in barium hexaferrite have been confirmed through magnetic measurements. The results show that the magnetic properties are closely related to the distributions of Zn-Nb ions on the five crystallographic sites. The saturation magnetization and coercivity increase with increasing Zn-Nb concentration.