Gazi University Journal of Science Part A: Engineering and Innovation

Yazarlar: Burak KARAKAŞ, Selçuk HELHEL

Konular:-

Anahtar Kelimeler:Nano–fluid,Nanotechnology,Electromagnetic shielding,Scattering parameters,Dielectric material

Özet: Electrical shielding effectiveness (ESE) has become a popular research topic after EM waves have begun to be used in our everyday lives. Although the absorption and reflection of electromagnetic energy are those two basic methods used, the efficient techniques used in shielding are based on suppressing the reflection of EM waves and increasing the absorption of energy. This study has focused on BaTiO3-ethanol nano–fluid as an absorber. Absorbing fluid/material was prepared by means of magnetic stirring, heating and ultrasonic bathing methods then the tubings that is going to behave as shielding screen (SS) were filled with this nano–fluid material. Transmission Line Method (TLM) was preferred to obtain reflection, transmission and absorption coefficients of ESE by means of S11 and S21. Fluid speed and its temperature have a potential to change the performance of ESE that it has been observed that increasing flow rate from 0 ml/min to 500 ml/min results in 12% increase in shielding effectiveness at low fluid temperature (300C). In the second case which measurements repeated at high fluid temperature (600C) it is seen that 1.05% increase in shielding effectiveness while flow rate increased from 0 ml/min to 500 ml/min.

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