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Positron annihilation lifetime spectroscopy in titanate ceramics

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dc.contributor.authorVance, ERen_AU
dc.contributor.authorHadley, JHen_AU
dc.date.accessioned2026-02-17T10:10:37Zen_AU
dc.date.issued2007-07-04en_AU
dc.date.statistics2026-01-29en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC: 620.14/1en_AU
dc.description.abstractPositron annihilation lifetimes increase from 0.17 ns to 0.25 ns when 0.05 formula units of alkaline earth vacancies exist in BTi03 perovskites [1 ,2], where B = Ca or Sr, and that are doped with trivalent rare earths R substituting for B ions, according to the agreed model of B(la 3x/2)Rx0 x/2Ti03 (0 = vacancy). However this state of affairs is not reproduced when B = Ba, so 5, Ba vacancies do not appear to be the main means of charge compensation for substitutional R ions in this case. However in this latter situation there is a small increase of a PALS spectral component having a lifetime of 0.3 ns, characteristic of a small number of Ba vacancies, upon s doping with Gd ions. The effects of other doping schemes employing rare earth doping of Ba titanate wil be discussed.en_AU
dc.identifier.booktitleInternational conference and exhibition : materials and austceram 2007en_AU
dc.identifier.citationVance, E. R., & Hadley, J. H. (2007). Positron annihilation lifetime spectroscopy in titanate ceramics. Presentation to the Materials and Austceram 2007 International Conference, 4th - 6th July 2007. Brighton Le Sands, Sydney, Australia: Novotel. In International conference and exhibition : materials and austceram 2007, (pp. 23). North Melbourne, Victoria : Materials Australia.en_AU
dc.identifier.conferenceenddate2007-07-06en_AU
dc.identifier.conferencenameMaterials and Austceram 2007 International Conferenceen_AU
dc.identifier.conferenceplaceBrighton Le Sands, Sydney, Australiaen_AU
dc.identifier.conferencestartdate2007-07-04en_AU
dc.identifier.govdoc9781876855304en_AU
dc.identifier.pagination23en_AU
dc.identifier.placeofpublicationNorth Melbourne, Australiaen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/17065en_AU
dc.language.isoenen_AU
dc.publisherMaterials Australiaen_AU
dc.subjectPositron annihilation spectroscopyen_AU
dc.subjectTitanatesen_AU
dc.subjectCeramicsen_AU
dc.subjectAlkaline earth metalsen_AU
dc.subjectPerovskitesen_AU
dc.subjectVacanciesen_AU
dc.titlePositron annihilation lifetime spectroscopy in titanate ceramicsen_AU
dc.typeConference Abstracten_AU

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