کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803513 | 1516468 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and properties of Na2Sr1.5Nb3âxRuxO10 (x = 0.5, 1.0, 1.5) series compounds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and properties of Na2Sr1.5Nb3âxRuxO10 (x = 0.5, 1.0, 1.5) series compounds Synthesis and properties of Na2Sr1.5Nb3âxRuxO10 (x = 0.5, 1.0, 1.5) series compounds](/preview/png/9803513.png)
چکیده انگلیسی
Na2Sr1.5Nb3âxRuxO10 (x = 0.5, 1.0, 1.5) series compounds with Ruddlesden-Popper (RP) structure were synthesized by solid state reaction. The compounds were characterized by X-ray diffraction, thermal gravimetric analysis and X-ray photoelectron spectroscopy. The RP phase forms at 1050 °C. The compounds decompose when exposed to the ambient air at room temperatures for a long time. The cryogenic electrical behavior of Na2Sr1.5Nb1.5Ru1.5O10 can be described by variable range hopping (VRH) model. The electronic conduction at temperatures below 52 K is via two-dimensional hopping mechanism and three-dimensional hopping above that temperature. The high temperature electrical behavior of all compounds accords well with Ï = Ï0 exp(Ea/kT) relation. Both the resistivity and activation energy decrease with increasing Ru content in the compounds. The Na+ ions in all specimens are immobilized and thus cannot be exchanged with other ions such as Li+, K+.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 399, Issues 1â2, 16 August 2005, Pages 219-223
Journal: Journal of Alloys and Compounds - Volume 399, Issues 1â2, 16 August 2005, Pages 219-223
نویسندگان
Zhongbing Wang, Zuyao Chen, Mingde Li, Liezhao Cao,