Microwave Absorption Properties of BaFe12O19-TiO2 Composite Coated with Conducting Polymer

• Published in: Journal of superconductivity and novel magnetism Vol. 26; no. 4; pp. 1369 - 1373
• Main Authors: Akman, O., Kavas, H., Baykal, A., Durmus, Z., Aktaş, B., Sözeri, H.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Boston Springer US 01-04-2013; Springer
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conducting polymers; Cross-disciplinary physics: materials science; rheology; Dielectric properties; Electrical, magnetic and optical properties; Exact sciences and technology; Frequency ranges; Magnetic Materials; Magnetic properties and materials; Magnetism; Mass ratios; Materials science; Microwave absorption; Microwave and radio-frequency interactions (excluding resonances); Microwaves; Networks; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Organic polymers; Original Paper; Other interactions of matter with particles and radiation; Other materials; Physicochemistry of polymers; Physics; Physics and Astronomy; Properties and characterization; Specific materials; Strongly Correlated Systems; Superconductivity; Titanium dioxide; Magnetic and dielectric composite; Microwave absorption; Conducting polymer; Magnetic properties; Scanning electron microscopy; Barium; Hexagonal ferrites; Microwave radiation; XRD; Coatings; Thickness; Microwave measurement; Conducting polymers; Composite materials; Barium ferrites; Titanium oxide
• ISSN: 1557-1939; 1557-1947
• DOI: 10.1007/s10948-012-1884-7

This study investigates microwave absorption properties of Ba-hexaferrite (BaFe
12
O
19
) and titanium dioxide (TiO
2
) particles coated with conducting polymer (PANI) and BaFe
12
O
19
-TiO
2
mixture in the frequency range of 8–18 GHz. Samples having different magnetic to dielectric mass ratios and various thicknesses from 1.5 to 4 mm have been prepared to investigate effect of magnetic and dielectric fillers together with influence of conducting polymer layer on microwave absorption properties of BaFe
12
O
19
-TiO
2
composite. Structural, magnetic, and microwave absorption properties of composites have been investigated using X-ray diffraction, scanning electron microscopy and near field microwave measurements using vector network analyzer. Microwave measurements revealed that composites with PANI coating have much higher absorption values which are independent of an absorber thickness. Among PANI coated absorbers, sample having magnetic to dielectric mass ratio of 2 showed better microwave properties in 8–18 GHz range.