Browsing by Author "Mahmoud A.E.R."

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    Determination of the sensing characteristics of SiO2-Bi2O3-TiO2 system towards relative humidity
    (2018-01-01) Afify A.S.; Slavov S.S.; Mahmoud A.E.R.; Hassan M.; Ataalla M.; Staneva A.; Mohamed A.
    The aim of the present study is to determine the relative humidity (RH) sensing characteristics of the glass and glasscrystalline materials based on SiO2-Bi2O3-TiO2 system prepared by the melt quenching and controlled glass crystallization methods. Sensors were obtained by screen-printing of the prepared compositions onto alumina substrates with Pt electrodes. The sensors were tested in the range (0.0 - 96%) of the relative humidity at room temperature. The results have shown that most of the obtained glass ceramic materials had a lower sensitivity towards RH. The composition 20SiO2.30Bi2O3.50TiO2 has possessed the highest permittivity value (3000 F.m-1) and the lowest value of dielectric loss (0.0002) at room temperature which make it a promising candidate for some industrial applications such as energy storage, electronic capacitors as well as memory devices.