إبراهيم علي عمار ومحمد مسعود هويدي ومحمد زيدان الفيتوري وحسين عبدالصمد وأسماء علي
المؤلفون بالإنجليزي
Ibrahim A. Amar , Mohammed M. Ahwidia, Mohammed Zidana, Ihssin Abdalsameda, Asmaa Alia
الملخص العربي
In this study, the effect of sintering temperature on the proton-and oxygen-ion conductivities of a nanocomposite electrolyte based on Ca-doped ceria/carbonate was investigated. Ca-doped ceria (CDC) nanoparticles were successfully synthesised using a sol-gel process. Ternary car-bonate eutectic salt ((Li/Na/K)2CO3) was prepared by solid-state reaction. A dual-phase nano-composite was prepared by mixing CDC with the ternary carbonate at a weight ratio of 70:30. The prepared materials were characterised by X-ray diffraction (XRD) and thermal analysis (TGA-DSC). The fabricated green nanocomposite pellets were sintered at two different temper-atures (600 and 700°C). AC Impedance spectroscopy was used to measure the ionic conductiv-ities of the composite electrolyte within the range of temperature from 300 to 600°C. The pro-ton ion (H+) conductivities at 600°C were found to be 0.33 and 0.37 S cm1 for samples sintered at 600 and 700°C, respectively. The oxygen ion (O2) conductivities at 600°C for samples sin-tered at 600 and 700°C were found to be 0.35 and 0.27 S cm1, respectively. The nanocomposite electrolyte was thermally stable in both atmospheres (oxidising and reducing). The results sug-gest that the nanocomposite can be used as an electrolyte material for the electrochemical de-vices operating within low to intermediate temperature range.
الملخص الانجليزي
In this study, the effect of sintering temperature on the proton-and oxygen-ion conductivities of a nanocomposite electrolyte based on Ca-doped ceria/carbonate was investigated. Ca-doped ceria (CDC) nanoparticles were successfully synthesised using a sol-gel process. Ternary car-bonate eutectic salt ((Li/Na/K)2CO3) was prepared by solid-state reaction. A dual-phase nano-composite was prepared by mixing CDC with the ternary carbonate at a weight ratio of 70:30. The prepared materials were characterised by X-ray diffraction (XRD) and thermal analysis (TGA-DSC). The fabricated green nanocomposite pellets were sintered at two different temper-atures (600 and 700°C). AC Impedance spectroscopy was used to measure the ionic conductiv-ities of the composite electrolyte within the range of temperature from 300 to 600°C. The pro-ton ion (H+) conductivities at 600°C were found to be 0.33 and 0.37 S cm1 for samples sintered at 600 and 700°C, respectively. The oxygen ion (O2) conductivities at 600°C for samples sin-tered at 600 and 700°C were found to be 0.35 and 0.27 S cm1, respectively. The nanocomposite electrolyte was thermally stable in both atmospheres (oxidising and reducing). The results sug-gest that the nanocomposite can be used as an electrolyte material for the electrochemical de-vices operating within low to intermediate temperature range.
محمد مسعود | mohammed | 5164