کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1458495 989579 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and ionic conduction of CaZr1−xScxO3−α ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Preparation and ionic conduction of CaZr1−xScxO3−α ceramics
چکیده انگلیسی

A series of CaZr1−xScxO3−α (x=0, 0.05, 0.10, 0.15) perovskite oxide ceramics were successfully fabricated at 1400 °C for 10 h and then further sintered at 1650 °C for 10 h via a solid-state reaction sintering process. Conductivities of the ceramics were measured under the atmosphere that contains 1% H2/Ar and 5.63 kPa H2O/Ar by the electrochemical impedance spectra technique. It was found that the conductivities of CaZr1−xScxO3−α (x=0, 0.05, 0.10, 0.15) ceramics increased with the increase of the measuring temperature, and the conductivity achieved its maximum value of 2.03×10−5–6.5×10−3 S cm−1 when the doping amount of Sc (x) was 0.10. Additionally, element doping can increase the conductivities and decrease the conductivity activation energies of CaZr1−xScxO3−α ceramics. The results of transport number measurement indicated that the CaZr0.9Sc0.1O3−α is almost a pure protonic conductor at 500–750 °C, while it is a mixed protonic-oxygen ionic-electronic conductor at 750–1300 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 12, September 2016, Pages 13404–13410
نویسندگان
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