Speaker
Description
Our research was aimed to use fly-ash as a solution to the problem of electromagnetic pollution. By re-purposing the class-F fly-ash from Bokaro TPP, Jharkhand, suitable for geopolymerization, we engineered FA tiles and comprehensively characterized them by VNA and impedance analysis.The tiles were further functionalized as an excellent dielectric yet significantly conducting material. The FA tiles had dielectric constant ε’≈14 with electrical conductivity σ≈4x10-6S/m at 1 MHz and attenuated X-band electromagnetic waves by 90%, giving (SET)>10dB. The electrical properties of the tiles were further enhanced by incorporating waste food wrappers (aluminized LDPE), resulting in ε’≈22 and σ≈ 5x10-4S/m. These FA tiles with aluminized wrappers gave 99% attenuation (SET>20dB) for microwaves. The EM wave absorption to reflection ratio was unity meeting the green index criteria for EMI shields.
| Nature of work | Experimental |
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