کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1531380 | 1512011 | 2007 | 7 صفحه PDF | دانلود رایگان |
Single-phase Gd0.9Sr0.1CoO3 perovskite was prepared by the solution-polymerization method from an aqueous solution containing a mixture of the corresponding metal nitrates, polyvinyl alcohol and sucrose. The calcination of precursor powders at 600 °C in air produced a crystalline nanostructured oxide possessing good connectivity between nanoparticles. The effect of addition of 4% weight of silver in Gd0.9Sr0.1CoO3 was characterized by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. The average particle size of Gd0.9Sr0.1CoO3 and Gd0.9Sr0.1CoO3–Ag was 45 nm and 55 nm, respectively. Both materials exhibit a moderate sensitivity to carbon dioxide and oxygen; however, the addition of silver to Gd0.9Sr0.1CoO3 produced an increment in the resistance change of 40.7% in O2 and 47% in CO2.
Journal: Materials Science and Engineering: B - Volume 141, Issues 1–2, 25 June 2007, Pages 1–7