کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296622 | 1498338 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dilatometry and high-temperature X-ray diffractometry study of La0.6Sr0.4Ti0.1Fe0.9O3 â δ and La0.6Sr0.4Ti0.3Fe0.7O3 â δ oxygen-permeable membranes
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The thermal expansion behavior of La0.6Sr0.4Ti1 â xFexO3 â δ (x = 0.7 and 0.9) was investigated by dilatometry and in situ powder X-ray diffractometry at 25 and 1000 °C under controlled oxygen partial pressures in air and at reducing atmosphere, PO2 = 0.21 and 1 Ã 10â 20 atm, respectively. The sintered samples of x = 0.7 and 0.9 showed positive thermal expansions, i.e., 12.4 and 14.4 Ã 10â 6 Kâ 1, respectively, in air up to 1000 °C, and also larger expansions at lower partial oxygen pressures, with a linear thermal expansion ratio factor of 0.10 and 0.40%. The change in the crystal lattice parameters analyzed by XRD Rietveld refinement showed that the crystal lattice volume increased with an increase in temperature and a decrease PO2. The linear thermal expansion rates estimated from volume change of the XRD data for the oxides of x = 0.7 and 0.9, were 0.13 and 0.27%, which corresponds to those of estimated from the dilatometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 181, Issues 33â34, 25 October 2010, Pages 1516-1520
Journal: Solid State Ionics - Volume 181, Issues 33â34, 25 October 2010, Pages 1516-1520
نویسندگان
Yosuke Takahashi, Takehiro Suzuki, Akihiro Kawahara, Yasunori Ando, Masayoshi Hirano, Woosuck Shin,