کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1298758 1498371 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The mixed ionic and electronic conductivity of CaZrO3 with cation nonstoichiometry and oxygen partial pressure
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
The mixed ionic and electronic conductivity of CaZrO3 with cation nonstoichiometry and oxygen partial pressure
چکیده انگلیسی

The electrical conductivities of Ca1 − xZrO3 − δ (0 ≤ x ≤ 0.10) ceramics were measured as a function of nonstoichiometry (x) and oxygen partial pressure (Po2) using impedance spectroscopy between 700 °C and 1100 °C. The stoichiometric CaZrO3 was a mixed ionic and electronic (hole) conductor in a high Po2 region. It was an ionic conductor in a low Po2 region. The analysis of impedance spectra revealed that the contributions of the grain and the grain boundary to the total conductivity were nearly constant independent of Po2 at 700 °C. In addition, the grain boundary mainly determined the electrical conductivity at 700 °C. When the Ca deficiency (x) increased up to 0.02, the electrical conductivity rapidly decreased with x due mostly to the decrease in the grain boundary conductivity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 179, Issues 21–26, 15 September 2008, Pages 1042–1045
نویسندگان
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