Dielectric and piezoelectric properties for 0.62Pb(Mg1/3Nb2/3)O3–0.38PbTiO3 single crystals
The dielectric and piezoelectric properties of 0.62Pb(Mg1/3Nb2/3)O3-0.38PbTiO3 single crystal (PMNT62/38) were studied. XRD showed that PMNT62/38 had a tetragonal structure at room temperature. The Curie temperature was 187 C on heating. The poled and as-grown dielectric constants of [001] oriented...
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Published in | Ceramics international Vol. 29; no. 2; pp. 145 - 150 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
01.01.2003
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Online Access | Get full text |
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Summary: | The dielectric and piezoelectric properties of 0.62Pb(Mg1/3Nb2/3)O3-0.38PbTiO3 single crystal (PMNT62/38) were studied. XRD showed that PMNT62/38 had a tetragonal structure at room temperature. The Curie temperature was 187 C on heating. The poled and as-grown dielectric constants of [001] oriented PMNT62/38 at room temperature were about 500 and about 5000, respectively. The remanent polarisation and coercive field were 34.2 microCoulomb/cm2 and 8.25 kV/cm, respectively. The strain at 15 kV/cm and -15 kV/cm were 0.078 and 0.125%, respectively. The piezoelectric constant d(33) was about 350 pC/N. The electromechanical coupling coefficients (k33 of 0.89; kt of 0.61; k31 of 0.46; k15 of 0.45) were calculated from measured resonance and anti-resonance frequencies by impedance techniques. In the single domain process, the re-oriented domains of [001] poled PMNT62/38 were found to be unstable, which made it difficult to align the spontaneous polarisations to create a single domain crystal. 11 refs. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0272-8842 |
DOI: | 10.1016/S0272-8842(02)00098-6 |