Effect of microwave sintering on structural and magnetic properties of SrFe12O19 nanopowders

Author

Katlakunta, Sadhana ; Meena, S.S. ; Shinde, R.S. ; Murthy, S.R.

Author_Institution

Dept. of Phys., Osmania Univ., Hyderabad, India

fYear

2013

fDate

24-26 July 2013

Firstpage

572

Lastpage

575

Abstract

Nanocrystalline SrFe₁₂O₁₉ has been prepared by microwave hydrothermal method at 473 K/90 min, subsequently annealed at different temperatures using microwaves (2.45GHz). The average particle size of the powders was found to be 48 nm. The plate shape grains were observed in FE-SEM at 1073 K. The crystals exhibited the typical hexagonal ferrite growth habit with a plate-like geometry. The effects of microwave sintering temperature on crystallinity, morphology and magnetic properties have been investigated. The grain sizes of sintered hexaferrites are in the range of 250 to 890 nm. The value of M_s = 58 kA/m and H_c = 125 kA/m was obtained at 1173 K/1h.

Keywords

annealing; ferrites; field emission electron microscopy; grain size; magnetic particles; magnetisation; nanofabrication; nanomagnetics; nanoparticles; particle size; scanning electron microscopy; sintering; strontium compounds; FESEM; SrFe₁₂O₁₉; annealing; grain sizes; hexaferrites; hexagonal ferrite growth; magnetic properties; magnetization curves; microwave hydrothermal method; microwave sintering; morphological properties; nanocrystalline materials; nanopowders; particle size; plate-like geometry; structural properties; temperature 1073 K; temperature 473 K; time 90 min; Magnetic analysis; Magnetic domains; Random access memory; Silicon; Strontium; Systematics; X-ray scattering; FE-SEM; Microwave-hydrothermal method; TG/DTA; XRD; magnetic properties;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Nanomaterials and Emerging Engineering Technologies (ICANMEET), 2013 International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4799-1377-0

Type

conf

DOI

10.1109/ICANMEET.2013.6609368

Filename

6609368