کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1297667 | 1498405 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrical conductivity of (Ba0.3Sr0.2La0.5)(In1âxFex)O3âδ
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have synthesized the perovskite oxides of the (Ba0.3Sr0.2La0.5)(In1âxFex)O3âδ system and measured the total electrical conductivity as a function of temperature and oxygen partial pressure. It was found that the single-phase composition region extended from x = 0.0 to x = 1.0, and that the Fe valence increased from 3.06 to 3.50 in that region. The electrical conductivity was semiconducting from x = 0.0 to x = 0.40 and metallic from x = 0.50 to x = 1.0. The total electrical conductivity at 800 °C also increased with the Fe content and achieved a maximum value of 140 (S/cm) at x = 1.0. From the dependence of the electrical conductivity on the oxygen partial pressure, we conclude that above x = 0.50, the majority carriers are holes. The estimated hole conductivity increased exponentially with the amount of Fe4+ cation present. The oxide ion conductivity was dependent on the oxygen vacancy content.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 177, Issues 15â16, 15 June 2006, Pages 1317-1322
Journal: Solid State Ionics - Volume 177, Issues 15â16, 15 June 2006, Pages 1317-1322
نویسندگان
Katsuyoshi Kakinuma, Keiji Yamakawa, Sayaka Hasunuma, Hiroshi Yamamura, Tooru Atake,