Electrical conductivity of textured Sm3+ and Nd3+ Co-doped CeO2 thin-film electrolyte

✍ Scribed by Wei Liu; Bin Li; Hongqin Liu; Wei Pan

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 668 KB
• Volume: 56
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2011.01.018

✦ Synopsis

Nanocrystalline thin-film electrolytes of Sm 3+ and Nd 3+ 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.