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Microstructure and PTCR effect of La-doped BaPbO3 ceramics
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.
2004 (English)In: Journal of materials science. Materials in electronics, ISSN 0957-4522, E-ISSN 1573-482X, Vol. 15, no 3, 183-186 p.Article in journal (Refereed) Published
Abstract [en]

La-doped BaPbO3 ceramics were prepared by using BaCO3 and PbO. Electrical properties and microstructure of the ceramics were studied. The results show a thin surface layer with a very low resistivity, and the interior of the ceramics with the characteristics of positive temperature coefficient of resistivity (PTCR). The PTCR behavior was related to the La content. The investigation by scanning electron microscopy and transmission electron microscopy revealed that the low resistivity of the surface layer was due to formation of a nano-size BaPbO3 phase with metallic properties.

Place, publisher, year, edition, pages
2004. Vol. 15, no 3, 183-186 p.
Keyword [en]
electrical-properties, barium-titanate, phase, decomposition, batio3, system
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-23082DOI: 10.1023/B:JMSE.0000011359.68323.65ISI: 000187939000010Scopus ID: 2-s2.0-0742268349OAI: oai:DiVA.org:kth-23082DiVA: diva2:341780
Note
QC 20100525 QC 20111031Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-10-31Bibliographically approved

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