Lead-free ferroelectric relaxor ceramics derived from BaTiO3

Issue		Eur. Phys. J. Appl. Phys. Volume 11, Number 1, July 2000


Page(s)		9 - 13
DOI		10.1051/epjap:2000140

DOI: 10.1051/epjap:2000140

Eur. Phys. J. AP 11, 9-13

Lead-free ferroelectric relaxor ceramics derived from BaTiO₃

J. Ravez - A. Simon

Institut de Chimie de la Matière Condensée - CNRS, 87 avenue A. Schweitzer, 33608 Pessac, France
jean.ravez@icmcb.u-bordeaux.fr

Received: 4 February 2000 / Revised and Accepted: 15 May 2000

Abstract
A large number of lead-free BaTiO₃-based ceramics were prepared. Depending on the composition, some of them exhibit a relaxor behaviour whose characteristics were related to the type of ionic substitution and to the substitution rate. The relaxor effect is all the more favoured as the composition deviates more from BaTiO₃ and as the substitution is heterovalent in the 6-coordination number crystallographic site. Some of these materials could prove valuable (dielectrics for capacitors and actuators) because they are environment-friendly.

PACS
77.84.-s Dielectric, piezoelectric, ferroelectric and antiferroelectric materials - 77.84.Dy Niobates, titanates, tantalates, PZT ceramics, etc. - 77.22.Gm Dielectric loss and relaxation

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