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Domain structure-property relations in lead lanthanum zirconate titanate ceramics

Published online by Cambridge University Press:  31 January 2011

Mehmet A. Akbas ,
Ian M. Reaney  and
William E. Lee
Mehmet A. Akbas
Affiliation:
Department of Engineering Materials, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
Ian M. Reaney
Affiliation:
Department of Engineering Materials, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
William E. Lee
Affiliation:
Department of Engineering Materials, The University of Sheffield, Sheffield, S1 3JD, United Kingdom
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Abstract

The domain structure and dielectric properties as a function of lanthanum concentration and Zr/Ti ratio have been investigated in rhombohedral and tetragonal lead lanthanum zirconate titanate (PLZT) ceramics. Transmission electron microscopy revealed that, with increasing lanthanum concentration and Zr/Ti ratio, the long-range-ordered domains (macrodomains) reduced in width, initially being fine scale (20 nm) striations, but eventually forming a “mottled” contrast (5 nm), characteristic of a relaxor. Relative permittivity measurements as a function of temperature revealed a correlation between broadening of the dielectric maxima and the onset of relaxor-type behavior with the appearance of the striations and mottled (relaxor) contrast, respectively.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 9 , September 1996 , pp. 2293 - 2301
Copyright
Copyright © Materials Research Society 1996

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