ELECTRICAL-CONDUCTIVITY AND THERMAL-EXPANSION OF CERIA-DOPED WITH PR, NB AND SN

FTIKOS, C; NAUER, M; STEELE, BCH

dc.contributor.author	FTIKOS, C	en
dc.contributor.author	NAUER, M	en
dc.contributor.author	STEELE, BCH	en
dc.date.accessioned	2014-03-01T01:09:23Z
dc.date.available	2014-03-01T01:09:23Z
dc.date.issued	1993	en
dc.identifier.issn	0955-2219	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10946
dc.subject	Electric Conductivity	en
dc.subject	Thermal Expansion	en
dc.subject.classification	Materials Science, Ceramics	en
dc.subject.other	OXYGEN ION CONDUCTION	en
dc.subject.other	SOLID-SOLUTIONS	en
dc.subject.other	MIXED CONDUCTION	en
dc.subject.other	FLUORITE	en
dc.subject.other	DIOXIDE	en
dc.subject.other	OXIDES	en
dc.subject.other	TRANSPORT	en
dc.subject.other	CATIONS	en
dc.title	ELECTRICAL-CONDUCTIVITY AND THERMAL-EXPANSION OF CERIA-DOPED WITH PR, NB AND SN	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0955-2219(93)90101-V	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0955-2219(93)90101-V	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	The effect of Pr, Nb and Sn substitution on the electrical conductivity, thermal expansion and the structure of the phases formed was investigated in a series of samples based on ceria solid solutions. X-Ray diffraction (XRD) analysis was performed in order to study the phase content and to measure the cell lattice parameters. Electrical conductivity was measured in air by means of the four-point DC technique, within the temperature range 400-1000 degrees C. Also, thermal expansion coefficient measurements were carried out using the dilatometer technique. The results show that doping of ceria with 8-10 mol% praseodimia increases the electrical conductivity, while the addition of Nb2O5 leads to the formation of a second, monoclinic, phases which decreases the conductivity. The thermal expansion coefficient in Pr-doped ceria is 8 x 10(-6)/K at temperatures lower than 500 degrees C, then it increases to 10-11 x 10(-6)/K at 900 degrees C. Doping with Nb2O5 eliminates the increase of thermal expansion at high temperatures. Sn was found to be a possible substitute for Ce in ceria solid solutions.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY	en
dc.identifier.doi	10.1016/0955-2219(93)90101-V	en
dc.identifier.isi	ISI:A1993ME19200004	en
dc.identifier.volume	12	en
dc.identifier.issue	4	en
dc.identifier.spage	267	en
dc.identifier.epage	270	en