Reformation processes of the MnO2Ta2O5Ta system under galvanostatic conditions

✍ Scribed by I. Montero; J.M. Albella; J.M. Martínez Duart

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 487 KB
• Volume: 35
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(90)90081-a

✦ Synopsis

The reformation process of the MnO,-Ta,O,-Ta system has been investigated by reanodizing at constant current tantalum anodes, previously anodized and covered by pyrolytic MnO, layers. From the voltage-time characteristics, two processes can be distinguished during the reanodization stage: a charging process of the capacitor up to a critical voltage followed by the formation of new oxide layers. For the later process, the pre-exponential factor in the ionic transport equation has been obtained from experiments involving sharp changes in the reanodization current.