Magnetic and Microwave Absorption Properties of PVB/Fe3O4 and PVB/NiFe2O4 Composites (original) (raw)

Electromagnetic and microwave absorbing properties of Polyvinylbutyral (PVB)/Fe3O4 and PVB/NiFe2O4 com- posites were investigated in the 1-14 GHz. PVB/filler particles (Fe3O4 and NiFe2O4) composites were pre- pared with 90/10 mixture ratios via Ultrasonic Probe Sonicator method in solution. The complex permittivity (e0 2je00) and permeability (l0- jl00) of the composites have been measured at different microwave frequen- cies in 1–14 GHz employing vector network analyzer (Keysight N9926A). The reflection loss (RL) of compo- sites was calculated and evaluated using theory of the absorbing wall. It was found that, both composites exhibit the large reflection loss and broadband within the frequency range from 1 to 14 GHz for 3, 5, and 7 mm. However, the RL results show that, when the thickness is 7 mm, the minimum RL was found to be 222.9 dB (99% power absorption) at the frequency of 13.93 GHz. The Fe3O4/PVB and NiFe2O4/PVB compo- sites have potential application for microwave and radar absorptions. POLYM. COMPOS., 00:000–000, 2017. VC 2017 Society of Plastics Engineers

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