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Perovskite NdTiO3 in Sr- and Ca-doped BaO–Nd2O3–TiO2 Microwave Dielectric Ceramics

Published online by Cambridge University Press:  31 January 2011

R. Ubic ,
I. M. Reaney  and
W. E. Lee
R. Ubic
Affiliation:
Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, United Kingdom
I. M. Reaney
Affiliation:
Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, United Kingdom
W. E. Lee
Affiliation:
Department of Engineering Materials, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, United Kingdom
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Abstract

Ba6–3xNd8+2xTi18O54 (BNT) is a useful dielectric resonator at microwave frequencies. Recent work has shown that the major secondary phase in this system can be indexed as Nd4Ti9O24 (JCPDS 33–943). The present study has evealed that when half of the stoichiometric Ba+2 is replaced with Ca+2 or Sr+2, a third, tilted perovskite-structured phase, NdTiO3, is also present. It forms as coherent intragranular regions within BNT grains and always contains some of the divalent dopant species. The orientational relationship between NdTiO3 and BNT has been established.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 4 , April 1999 , pp. 1576 - 1580
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

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