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Formation of Ruddlesden–Popper faults and polytype phases in SrO-doped SrTiO3

Published online by Cambridge University Press:  31 January 2011

S. Šturm ,
A. Rečnik ,
C. Scheu  and
M. Čeh
S. Šturm
Affiliation:
“Jožef Stefan” Institute, Ceramics Department, Jamova 39, 1000 Ljubljana, Slovenia
A. Rečnik
Affiliation:
“Jožef Stefan” Institute, Ceramics Department, Jamova 39, 1000 Ljubljana, Slovenia
C. Scheu
Affiliation:
Max-Planck-Institut für Metallforschung, Seestrasse 92, 70174 Stuttgart, Germany
M. Čeh
Affiliation:
“Jožef Stefan” Institute, Ceramics Department, Jamova 39, 1000 Ljubljana, Slovenia
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Abstract

The formation of so-called Ruddlesden–Popper planar faults was studied in SrO-doped SrTiO3 for different quantities of SrO additions and sintering conditions. For small SrO additions we observed a microstructure with a uniform grain size distribution and the enrichment of SrO at the grain boundaries. Larger additions of SrO produced a microstructure of elongated grains containing random planar faults, polytypic lamellae of more or less ordered faults, and polytype loops within SrTiO3 grains. We showed that these SrTiO3 grains were elongated as a result of preferential growth of the polytypic lamellae. In addition, we discuss a correlation between the formation of planar faults embedded in the perovskite matrix at low firing temperatures and Ruddlesden–Popper phases that are stable at higher temperatures.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 10 , October 2000 , pp. 2131 - 2139
Copyright
Copyright © Materials Research Society 2000

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References

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