Increased operating temperature range in La-modified Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-PbTiO/sub 3/ relaxor ferroelectric-based transducers

The large E-field induced strains and electromechanical coupling in PMN-based relaxors have been utilized in actuator and transducer applications. The effect of La/sup 3+/ modifications on the field-dependent dielectric and piezoelectric properties was investigated for several (1-x)PMN-(x)PT composi...

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Main Authors: Fielding, J.T., Shrout, T.R., Jang, S.J.
Format: Conference Proceeding
Language:English
Subjects:
Dielectric constant
Dielectric losses
Dielectric measurements
Impedance
Niobium
Performance evaluation
Polarization
Pyroelectricity
Temperature distribution
Temperature measurement
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creator Fielding, J.T.
Shrout, T.R.
Jang, S.J.
description The large E-field induced strains and electromechanical coupling in PMN-based relaxors have been utilized in actuator and transducer applications. The effect of La/sup 3+/ modifications on the field-dependent dielectric and piezoelectric properties was investigated for several (1-x)PMN-(x)PT compositions with transition regions near room temperature. The effect of La/sup 3+/ modifications, increasing the width of the micro-macro polar transition range (/spl Delta/T), defined as the difference between the temperature of maximum permittivity (T/sub max/) and the depolarization temperature (T/sub d/), results in a broader temperature range for obtaining large induced electromechanical coupling factors with negligible hysteresis.
doi_str_mv 10.1109/ISAF.1994.522324
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ispartof Proceedings of 1994 IEEE International Symposium on Applications of Ferroelectrics, 1994, p.158-161
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Dielectric constant
Dielectric losses
Dielectric measurements
Impedance
Niobium
Performance evaluation
Polarization
Pyroelectricity
Temperature distribution
Temperature measurement
title Increased operating temperature range in La-modified Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-PbTiO/sub 3/ relaxor ferroelectric-based transducers
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