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Amorphisation of Perovskite: the Effectofcomposition and Pre-Existing Cation Vacancies

Published online by Cambridge University Press:  10 February 2011

Katherine L. Smith ,
Gregory R. Lumpkin ,
Mark G. Blackford  and
Eric R. Vance
Katherine L. Smith
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, P.M.B. 1, Menai, NSW 2234, Australia. kls@ ansto.gov.au
Gregory R. Lumpkin
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, P.M.B. 1, Menai, NSW 2234, Australia. kls@ ansto.gov.au
Mark G. Blackford
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, P.M.B. 1, Menai, NSW 2234, Australia. kls@ ansto.gov.au
Eric R. Vance
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, P.M.B. 1, Menai, NSW 2234, Australia. kls@ ansto.gov.au
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Abstract

Eight perovskites of different compositions and pre-existing vacancy contents were irradiated with 1.5 MeV Kr+ ions using the HVEM-Tandem User Facility at Argonne National Laboratory. The critical dose of 1.5 MeV Kr+ ions for amorphisation (Dc) of NaNbO3, SrTiO3 and two natural perovskites varies with composition and may decrease with Na content. The D,c values of 5 members of the solid solution series from SrTiO3 to La0.67TiO3 do not exhibit a simple relationship with vacancy content: In particular, Dc(Sr0 7La0.2TiO3) is extraordinarily high (>170 × 1014 ions cm−2) compared to those of the other (Sr, La)-perovskites in the series, which have Dc values between 2.4 and 11 × 1014 ions cm−2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 556: Symposium QQ – Scientific Basis for Nuclear Waste Management XXII , 1999 , 1185
Copyright
Copyright © Materials Research Society 1999

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References

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