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Effect of ageing on the electrical resistivities of (Ba0.69Pb0.31)Ti-3 PTCR ceramic thermistors
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Ceramics.
2005 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 31, no 3, 375-378 p.Article in journal (Refereed) Published
Abstract [en]

The electrical resistivity of (Ba0.69Pb0.31)TiO3 PTCR ceramic thermistors aged at temperatures of 175, 200, 250 and 300 degrees C, respectively, were measured. When the samples were aged at temperatures of 175 and 200 degrees C, room-temperature resistivity decreased at the initial ageing stage, and then increased with the ageing time. The samples displayed a monotonous rise of the room-temperature resistivity when the ageing treatments were performed at 250 and 300 degrees C. PTCR effects showed different characteristics after different ageing treatments. These ageing characteristics were analyzed by considering interior oxidation and reduction reactions.

Place, publisher, year, edition, pages
2005. Vol. 31, no 3, 375-378 p.
Keyword [en]
electrical properties, thermistors, (Ba0.69Pb0.31)TiO3, ageing, oxidation, reduction, donor-doped batio3
URN: urn:nbn:se:kth:diva-14596DOI: 10.1016/j.ceramint.2004.06.021ISI: 000227603500003ScopusID: 2-s2.0-12344280193OAI: diva2:332637
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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