Temperature-induced phase transitions during ion-beam irradiation of the perovskite-structure oxides

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Several perovskite-structure oxide compounds, including CaTiO{sub 3}, SrTiO{sub 3}, BaTiO{sub 3}, KNbO{sub 3}, and KTaO{sub 3} were irradiated by 800 keV Kr{sup +} ions in order to investigate and compare their response to heavy-ion irradiation. The critical amorphization temperature T{sub c}, above which amorphization temperature T{sub c}, above which amorphization could not be induced, was found to increase in the order SrTiO{sub 3} {yields} CaTiO{sub 3} {yields} BaTiO{sub 3} {yields} KNbO{sub 3} {yields} KTaO{sub 3}. No single physical parameter explains the observed sequence, although T{sub c} correlates well with the melting temperatures. The well-known temperature-driven phase transformations in these materials ... continued below

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6 p.

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Meldrum, A.; Boatner, L. A. & Ewing, R. C. December 1997.

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  • Meldrum, A.
  • Boatner, L. A. Oak Ridge National Lab., TN (United States)
  • Ewing, R. C. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences

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Several perovskite-structure oxide compounds, including CaTiO{sub 3}, SrTiO{sub 3}, BaTiO{sub 3}, KNbO{sub 3}, and KTaO{sub 3} were irradiated by 800 keV Kr{sup +} ions in order to investigate and compare their response to heavy-ion irradiation. The critical amorphization temperature T{sub c}, above which amorphization temperature T{sub c}, above which amorphization could not be induced, was found to increase in the order SrTiO{sub 3} {yields} CaTiO{sub 3} {yields} BaTiO{sub 3} {yields} KNbO{sub 3} {yields} KTaO{sub 3}. No single physical parameter explains the observed sequence, although T{sub c} correlates well with the melting temperatures. The well-known temperature-driven phase transformations in these materials did not have a significant effect on the dose required for amorphization. Domain boundaries were observed in the pristine samples; however, after only a low dose, the boundaries became poorly defined and, with increasing dose, eventually disappeared. Dislocation loops were observed to aggregate at the domain boundaries.

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6 p.

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INIS; OSTI as DE98001935

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  • 1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997

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  • Other: DE98001935
  • Report No.: ORNL/CP--95551
  • Report No.: CONF-971201--
  • Grant Number: AC05-96OR22464;FG03-93ER45498
  • Office of Scientific & Technical Information Report Number: 565390
  • Archival Resource Key: ark:/67531/metadc691312

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  • December 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 22, 2016, 7:18 p.m.

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Meldrum, A.; Boatner, L. A. & Ewing, R. C. Temperature-induced phase transitions during ion-beam irradiation of the perovskite-structure oxides, article, December 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc691312/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.