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Dielectric, piezoelectric, and pyroelectric studies of LiTaO3-derived ceramics sintered at 900°C following the addition of (LiF + MgF2)

Published online by Cambridge University Press:  31 January 2011

Zuo-Guang Ye ,
R. Von Der Mühll ,
J. Ravez  and
P. Hagenmuller
Zuo-Guang Ye
Affiliation:
Laboratoire de Chimie du Solide du C.N.R.S., 351 cours de la Libération, 33405 Talence Cedex, France
R. Von Der Mühll
Affiliation:
Laboratoire de Chimie du Solide du C.N.R.S., 351 cours de la Libération, 33405 Talence Cedex, France
J. Ravez
Affiliation:
Laboratoire de Chimie du Solide du C.N.R.S., 351 cours de la Libération, 33405 Talence Cedex, France
P. Hagenmuller
Affiliation:
Laboratoire de Chimie du Solide du C.N.R.S., 351 cours de la Libération, 33405 Talence Cedex, France
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Abstract

High-densified LiTaO3-type ceramics have been obtained by sintering at 900°C after the addition of small amounts of a LiF + MgF2 mixture. Partial hydrolysis of MgF2 and volatilization of either LiF, LiOH, or Li2O due to hydrolysis and partial substitution of F-ions by (OH−) occur during heat treatment. The ferroelectric Curie temperature Tc increases with the amount of additive. The ceramics have been polarized by heating to Tc and cooling down under a dc field. The piezoelectric and pyroelectric coefficients of such ceramics are approximately 30% and 20% of the corresponding values for a LiTaO3 single crystal.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 1 , February 1988 , pp. 112 - 115
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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