Effect of electric field on the shape-memory effect in Pb[(Mg1/3Nb2/3)0.70Ti0.30]O3 ceramic

The shape-memory effect (SME) is demonstrated to occur for the solid solution of lead magnesium niobate with lead titanate for the molar ratio 70:30. Since the material is an insulator, it was possible to apply an electric field to influence and investigate the SME. It is shown that electric field c...

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Bibliographic Details
Published in:Smart materials and structures 2006-04, Vol.15 (2), p.653-658
Main Authors: Pandit, P, Gupta, S M, Wadhawan, V K
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Measurement and testing methods
Physics
Servo and control equipment
robots
Solid mechanics
Structural and continuum mechanics
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Summary:The shape-memory effect (SME) is demonstrated to occur for the solid solution of lead magnesium niobate with lead titanate for the molar ratio 70:30. Since the material is an insulator, it was possible to apply an electric field to influence and investigate the SME. It is shown that electric field can be used for enhancing the shape strain produced by the bending load, although some fraction of the shape strain becomes irrecoverable on repeated SME cycling under the combined effects of mechanical and electric loads. An explanation is offered for this and other observations, invoking the relaxor-ferroelectric nature of the ceramic. Such materials have potential for use as 'actuators with a memory' in smart structures.
ISSN:0964-1726
1361-665X
DOI:10.1088/0964-1726/15/2/049