Abstract
The purpose of this paper is to prepare novel nanocomposite pressure sensors with lightweight, low cost, and high sensitivity. The nanocomposites of poly (ethylene oxide)-polyvinyl pyrrolidone-Tin dioxidenanoparticles -manganese dioxide nanoparticles have been investigated. The structural and dielectric properties (PEO-PVP-SnO2-MnO2) nanocomposite has been studied. Nanocomposite dielectric properties have been evaluated in the frequency range (100 -5×106)Hz. The experimental results demonstrated that as the frequency rises, the dielectric constant and dielectric losses decrease. The dielectric constant, and dielectric losses increase with the concentration of manganese dioxide nanoparticles. The A.C electrical conductivity increases with the concentration of manganese dioxide nanoparticles and the frequency. The application of nanocomposite pressure sensors in the pressure interval (80-160) bar was investigated. The results exhibited that the electric capacitance of (PEO-PVP-SnO2-MnO2) nanocomposites decreases, as the pressure increases. Also, with increasing the weight percentage of manganese dioxide nanoparticles, the electric capacitance of nanocomposites rises. The nanocomposite has a high sensitivity to pressure.
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