%0 Journal Article
%T Synthesis and microwave absorption enhancement of BaTiO3 nanoparticle/polyvinylbutyral composites
%A Fatih Hayat
%A Y¨¹ksel Akinay
%J Journal of Composite Materials
%@ 1530-793X
%D 2019
%R 10.1177/0021998318788144
%X Barium titanate (BaTiO3)-polyvinyl butyral (PVB) composites at various weight concentrations were prepared via ultrasonic probe sonicator. The sonication was carried out at 20£¿kHz and 70% amplitude for about 2£¿h and BaTiO3 nanoparticles were dispersed well in the mixture of PVB/ethanol under probe sonication. As a microwave absorbent, the microwave absorbing properties of the BaTiO3 nanoparticle-PVB composites with different mixture ratios of 5£¿wt.% (RAM1), 10£¿wt.% (RAM2) and 15£¿wt.% (RAM3) BaTiO3 were investigated based on transmission line theory in the frequency range from 1 GHz to 14£¿GHz. The minimum reflection loss (RL) of the RAM1 reaches £¿3.47£¿dB at 5.57£¿GHz with a matching thickness of only 7.0£¿mm. For RAM2 with 4£¿mm and 4.2£¿mm thickness (tm), the RL values are less than £¿10£¿dB obtained in the frequency 10.3¨C13.4£¿GHz. The RAM3 composite with 15£¿wt.% BaTiO3 mixture ratio shows a minimum reflection loss of £¿43.8£¿dB at 11.01£¿GHz with a £¿15£¿dB bandwidth over the extended frequency range of 10.2¨C13.2£¿GHz for a thickness of 2.8£¿mm and £¿44.2£¿dB at 4.77£¿GHz for a thickness of 6.5£¿mm
%K Barium titanate
%K polyvinylbutyral
%K permittivity
%K reflection loss
%U https://journals.sagepub.com/doi/full/10.1177/0021998318788144