کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
189837 | 459686 | 2011 | 4 صفحه PDF | دانلود رایگان |
Nanocrystalline thin-film electrolytes of Sm3+ and Nd3+ co-doped ceria have been deposited on polycrystalline alumina substrates via RF magnetron sputtering. It is found that with the increase of substrate temperature from room temperature to 600 °C, the structure of the film varies from (1 1 1) preferred orientation to random orientation, accompanied by an enhancement in electrical conductivity. It is estimated that the activation energy for oxygen ion migration along (1 1 1) orientation may be higher than other crystal orientations, resulting in a lower conductivity of the (1 1 1) barrier textured co-doped ceria film electrolyte. It also indicates that the electrical conduction is predominantly due to the oxygen ions.
Research highlights
► Sm3+ and Nd3+ co-doped ceria thin-film electrolytes are deposited by RF magnetron sputtering.
► With increase in the substrate temperature from room temperature to 600 °C, the structure of the film varies from (1 1 1) preferred orientation to random orientation.
► The (1 1 1) textured film has lower electric conductivity in comparison with the random oriented film.
► The SNDC film deposited at 600 °C shows the maximum conductivity of 0.006 S cm−1 at 500 °C.
Journal: Electrochimica Acta - Volume 56, Issue 9, 30 March 2011, Pages 3334–3337