On the role of mass-transfer processes in ageing of manganite electroceramics

Ageing phenomena in NTC thermistors based on copper–nickel–cobalt manganite electroceramics under thermal exposure at 125 and 170 °C during 1000 h are studied. The observed relative resistance drift is compared with the results of XRD, ceramics microstructure characterization (optical microscopy, SE...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Journal of the European Ceramic Society 2004, Vol.24 (6), p.1277-1280
Hauptverfasser:	Vakiv, M., Hadzaman, I., Shpotyuk, O., Mrooz, O., Plewa, J., Altenburg, H., Uphoff, H., Bodak, O., Demchenko, P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Ageing Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Conductors, resistors (including thermistors, varistors, and photoresistors) Electronic equipment and fabrication. Passive components, printed wiring boards, connectics Electronics Electrotechnical and electronic ceramics Exact sciences and technology Spinels Technical ceramics Thermistors Transition metal oxides X-ray methods
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Ageing phenomena in NTC thermistors based on copper–nickel–cobalt manganite electroceramics under thermal exposure at 125 and 170 °C during 1000 h are studied. The observed relative resistance drift is compared with the results of XRD, ceramics microstructure characterization (optical microscopy, SEM), electron probe microanalysis, as well as thermogravimetry measurements. It is shown, at the example of Cu 0.1Ni 0.8Co 0.2Mn 1.9O 4 electroceramics, that the microstructure origin of ageing phenomena can be adequately explained by thermally stimulated mass-transfer processes in the ceramic body.
ISSN:	0955-2219 1873-619X
DOI:	10.1016/S0955-2219(03)00378-9