36 research outputs found
Solid electrolytes based on {1 − (x + y)}ZrO2-(x)MgO-(y)CaO ternary system: Preparation, characterization, ionic conductivity, and dielectric properties
No full textDifferent composition of composite material of zirconium dioxide co-doped with magnesium oxide [MgO(x)] and calcium oxide [CaO(y)] according to the general molecular formula {1 − (x + y)}ZrO2-(x)MgO-(y)CaO were prepared by co-precipitation method and characterized by different techniques, such as XRD, FTIR, TG-DTA, and SEM. Co-doping was conducted to enhance the ionic conductivity, as mixed system show higher conductivity than the single doped one. Arrhenius plots of the conductance revealed that the co-doped composition “6Mg3Ca” has a higher conductivity with a minimum activation energy of 0.003 eV in temperature range of 50–190 °C. With increasing temperature, dielectric constant value increased; however, with increasing frequency it shows opposite trend. Co-doped composition C2 exhibit higher conductivity compared to C3, owing to the concentration of Mg content (0–6%); the conductivity decreases thereafter. Zirconium oxide was firstly used for medical purpose in orthopaedics, but currently different type of zirconia-ceramic materials has been successfully introduced into the clinic to fix the dental prostheses
Behaviour of electrical conductivity in CsI–Al2O3 and CsI–TiO2 systems
No full textAbstractThis paper reports the effect of heterogeneously doped alumina and titania on the ionic conductivity of CsI. Composite materials (1−x)CsI–xAl2O3 and (1−x)CsI–xTiO2, x=0–0.7 have been prepared and studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and impedance spectroscopy. The results confirmed the formation of a composite in which the interface layer plays an important role in controlling the bulk properties of the material. Enhancement of electrical conductivity is noticed with the increase in the mole percent (mol%) of dispersoid and the maximum enhancement is observed at x=0.3 in case of alumina as well as titania. Arrhenius equation is used to study the effect of temperature on conductivity and activation energy. As the electrical conductivity increased, the activation energy was found to be decreased. The activation energy for CsI–xAl2O3 and CsI–xTiO2 systems was 0.713 and 0.677eV, respectively
Thermodynamics of ion conductivity of alkali halides across a polystyrene-based titanium arsenate membrane
No full textMetal ion transport through a polystyrene-based cobalt arsenate membrane: Application of irreversible thermodynamics and theory of absolute reaction rates
No full textSynthesis, characterization and electrical properties of CdI2 doped Al2O3 and TiO2 superionic conductors
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Silver nanoparticles formation using tyrosine in presence cetyltrimethylammonium bromide
No full textAn electrochemical and theoretical comparison of ionic transport through a polystyrene-based cobalt arsenate membrane
No full textFormation, characterisation and redox behaviour of water-soluble colloidal manganese dioxide
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