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dc.contributor.authorLu, YYen_US
dc.contributor.authorTseng, TYen_US
dc.date.accessioned2014-12-08T15:49:07Z-
dc.date.available2014-12-08T15:49:07Z-
dc.date.issued1998-05-01en_US
dc.identifier.issn0254-0584en_US
dc.identifier.urihttp://hdl.handle.net/11536/32637-
dc.description.abstractElectrical properties of the positive temperature coefficient of resistance (PTCR) ceramics of compositions Pb,Sr0.0094-xY0.006TiO3 (x=0.5, 0.6 and 0.7) with Curie point over 140 degrees C up to 280 degrees C were studied. The built-in potentials formed at grain boundaries in these ceramics were determined on the basis of the Heywang model. These built-in potentials an found to increase with increasing temperature and contribute to the PTCR effect of the ceramics. The resistances of grain and grain boundary of the ceramics were studied using the complex-plane impedance method. It is clearly observed that the grain resistance of the ceramic is much smaller compared to its grain boundary resistance and the change in resistivity with temperature is contributed mainly by the variation of grain boundary resistance. (C) 1998 Elsevier Science S.A. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectpositive temperature coefficient of resistanceen_US
dc.subjectHeywang modelen_US
dc.subjectbuilt-in potentialsen_US
dc.subjectcomplex-plane impedance methoden_US
dc.titleElectrical characteristics of (Pb,Sr)TiO3 positive temperature coefficient ceramicsen_US
dc.typeArticleen_US
dc.identifier.journalMATERIALS CHEMISTRY AND PHYSICSen_US
dc.citation.volume53en_US
dc.citation.issue2en_US
dc.citation.spage132en_US
dc.citation.epage137en_US
dc.contributor.department電子工程學系及電子研究所zh_TW
dc.contributor.departmentDepartment of Electronics Engineering and Institute of Electronicsen_US
dc.identifier.wosnumberWOS:000073078300003-
dc.citation.woscount19-
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