Loading Effect of Sol-Gel Derived Barium Hexaferrite on Magnetic Polymer Composites
Open Access
- 24 February 2021
- journal article
- research article
- Published by MDPI AG in Nanomaterials
- Vol. 11 (3), 558
- https://doi.org/10.3390/nano11030558
Abstract
Solution–processing methods were investigated as viable alternatives to produce the polymer-bonded barium hexaferrite (BaM). BaM powders were first synthesized by using the sol-gel auto-combustion method. While the ignition period in two synthesis batches varied, the morphology of hexagonal microplates and nanorods, as well as magnetic properties, were reproduced. To prepare magnetic polymer composites, these BaM powders were then incorporated into the acrylonitrile-butadiene-styrene (ABS) matrix with a weight ratio of 80:20, 70:30, and 60:40 by using the solution casting method. Magnetizations were linearly decreased with a reduction in ferrite loading. Compared to the BaM loose powders and pressed pellet, both remanent and saturation magnetizations were lower and gave rise to comparable values of the squareness. The squareness around 0.5 of BaM samples and their composites revealed the isotropic alignment. Interestingly, the coercivity was significantly increased from 1727–1776 Oe in loose BaM powders to 1874–2052 Oe for the BaM-ABS composites. These composites have potential to be implemented in the additive manufacturing of rare-earth-free magnets.Keywords
Funding Information
- Thailand Center of Excellence in Physics (ThEP-60-PIP-WU3)
This publication has 57 references indexed in Scilit:
- Hexagonal ferrites: A review of the synthesis, properties and applications of hexaferrite ceramicsProgress in Materials Science, 2012
- Electromagnetic and Dynamic Mechanical Properties of Extruded Cobalt Ferrite-Polypropylene CompositesPolymer-Plastics Technology and Engineering, 2011
- Barium hexaferrite nanoparticles: Synthesis and magnetic propertiesMaterials Science and Engineering B, 2010
- Factors Affecting the Synthesis and Formation of Single-Phase Barium Hexaferrite by a Technique of Oxalate PrecursorAmerican Journal of Applied Sciences, 2010
- Effect of Fe3+/Ba2+ mole ratio on the phase formation and microwave properties of BaFe12O19 prepared by citrate–EDTA complexing methodJournal of Alloys and Compounds, 2009
- Influence of pH on characteristics of BaFe12O19 powder prepared by sol–gel auto-combustionJournal of Magnetism and Magnetic Materials, 2006
- Synthesis and characterization of barium hexaferrite nanoparticlesJournal of the American Academy of Dermatology, 2006
- Structural characterization of nano-crystalline BaFe12O19 powders synthesized by sol–gel combustion routeScripta Materialia, 2005
- Magnetic recording materials since 1975Journal of Magnetism and Magnetic Materials, 1991
- A Study of the Magnetic Domains of Isolated Fine Particles of Ba FerriteJapanese Journal of Applied Physics, 1988