کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7887888 1509792 2018 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical and thermal characterization of doped ceria electrolyte with lanthanum and zirconium
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Electrochemical and thermal characterization of doped ceria electrolyte with lanthanum and zirconium
چکیده انگلیسی
Nanocomposites electrolytes consisting of La3+ and Zr4+ doped with ceria labelled as La0.2 Ce0.8 O2-δ (LDC), Zr0.2Ce0.8O2-δ (ZDC) and Zr0.2La0.2Ce0.6O2-δ (ZLDC) have been synthesized via a co-precipitation route. DC conductivity was studied with a four-probe method in the range of temperature 450-650 °C and maximum conductivity was found to be 0.81 × 10−2 S.cm−1 (LDC) > 0.32 × 10−2 S.cm−1 (ZLDC) > 0.15 × 10−2 S.cm−1 (ZDC) at a temperature of 650 °C, respectively. Further, electric behavior of doped and co-doped ceria electrolytes was investigated by A.C electrochemical impedance spectroscopy (frequency range ~ 0.1 Hz‒4 MHz). The phase/structural identification of the material prepared was studied using X-ray diffraction and found ceria to possess a cubic fluorite structure. Scanning electron microscopy (SEM) was carried out to study its morphology and particle size (~ 90-120 nm). Thermal behavior on its change in weight and length with the temperature were studied by thermogravimetric analysis (TGA) and dilatometry respectively. Furthermore, thermal expansion coefficients (TECs) of prepared electrolytes are calculated and found as follows: 13.4 × 10−6 °C−1, 13.6 × 10−6 °C−1and 15.3 × 10−6 °C−1 for LDC, ZDC and ZLDC, respectively, in the temperature range 150-1150 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 6, 15 April 2018, Pages 6493-6499
نویسندگان
, , , , , ,