Reflection and Transmission Coefficient of Yttrium Iron Garnet Filled Polyvinylidene Fluoride Composite Using Rectangular Waveguide at Microwave Frequencies

• Main Authors: Hassan Soleimani, Zulkifly Abbas, Noorhana Yahya, Kamyar Shameli, Hojjatollah Soleimani, Parvaneh Shabanzadeh
• Format: Article
• Language: English
• Published: MDPI AG 2012-07-01
• Series: International Journal of Molecular Sciences
• Subjects: microwave measurements; RW-90 waveguide; YIG; PVDF; composites
• Online Access: http://www.mdpi.com/1422-0067/13/7/8540

The sol-gel method was carried out to synthesize nanosized Yttrium Iron Garnet (YIG). The nanomaterials with ferrite structure were heat-treated at different temperatures from 500 to 1000 °C. The phase identification, morphology and functional groups of the prepared samples were characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR), respectively. The YIG ferrite nanopowder was composited with polyvinylidene fluoride (PVDF) by a solution casting method. The magnitudes of reflection and transmission coefficients of PVDF/YIG containing 6, 10 and 13% YIG, respectively, were measured using rectangular waveguide in conjunction with a microwave vector network analyzer (VNA) in X-band frequencies. The results indicate that the presence of YIG in polymer composites causes an increase in reflection coefficient and decrease in transmission coefficient of the polymer.