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Comprehensive investigation of elastic and electrical properties of Li/Ta-modified (K,Na)NbO3 lead-free piezoceramics
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10.1063/1.4803711
/content/aip/journal/jap/113/17/10.1063/1.4803711
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/17/10.1063/1.4803711

Figures

Image of FIG. 1.
FIG. 1.

(a) SEM of thermally etched surface of KNNLT ceramics, (b) back-scattering image of polished surface of KNNLT ceramics and (c) EDX spectra corresponding to the spots numbered in (b).

Image of FIG. 2.
FIG. 2.

(a) XRD pattern, (b) temperature dependence of dielectric permittivity and dielectric loss, (c) polarization hysteresis loop and (d) unipolar electrostrain versus electric field curve of KNNLT ceramics.

Image of FIG. 3.
FIG. 3.

Comparison of values measured by three distinctive methods.

Image of FIG. 4.
FIG. 4.

Normalized strain * as a function of temperature and the change of * was normalized to its room temperature value *.

Image of FIG. 5.
FIG. 5.

Frequency dependence of normalized strain * and the change of * was normalized to the value obtained at 1 Hz *. * of KNNLT was also compared to that of KNNL (Ref. ).

Image of FIG. 6.
FIG. 6.

(a) PE, (b) SE, (c) -E, and (d) -E of KNNLT ceramics before fatigue and after 10 and 10 bipolar fatigue cycles.

Tables

Generic image for table
Table I.

Elastic stiffness constants and elastic compliance constants of KNNLT ceramics and compared to those of KNN-KCN (Ref. ) and PZT5A (Ref. ).

Generic image for table
Table II.

Dielectric constants and electromechanical coupling factors of KNNLT ceramics and compared to those of KNN-KCN (Ref. ) and PZT5A (Ref. ).

Generic image for table
Table III.

Piezoelectric coefficients of KNNLT ceramics and compared to those of KNN-KCN (Ref. ) and PZT5A (Ref. ).

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/content/aip/journal/jap/113/17/10.1063/1.4803711
2013-05-06
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Comprehensive investigation of elastic and electrical properties of Li/Ta-modified (K,Na)NbO3 lead-free piezoceramics
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/17/10.1063/1.4803711
10.1063/1.4803711
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