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Proceedings Paper

Piezoelectric properties of Sr2-XCaXNaNb5O15 (SCNN) ceramics (0.05
Author(s): Yoshio Akimune; Tatsuo Sugiyama; Kazuo Matsuo; Rong-Jun Xie
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Paper Abstract

The study investigating the electrical properties of dense lead-free piezoelectric ceramics in the (1-x)Sr2NaNb5O15-xCa2NaNb5O15 (SCNN) system with x ranging from 0.05 to 0.35 is reported here. Materials were produced with Spark Plasma Sintering (SPS) method. X-Ray diffraction patterns all showed a single tetragonal tungsten bronze phase, peak broadening being seen on increasing the Ca content. The lattice constant calculation indicated distortion and shrinkage of the crystal structure with Ca substitution. Ferroelectric and piezoelectric properties of SCNN greatly depended on the Ca content. The composition with x =0.15 exhibited the greatest polarization with Pr =3.0 μC cm-2and piezoelectric constant of d33 =96 pC/ N, whereas the compositions with x =0.30 and 0.35 almost lost their ferroelectricity and piezoelectricity. Not only investigation of materials properties but also application possibility as a sensor is surveyed. The ultrasonic waves generated by SCNN material as a sensor are much clearer that that by commercially available PZT materials. This study apparently indicates that lead-free SCNN piezoelectric ceramics have potential for electromechanical application.

Paper Details

Date Published: 16 February 2004
PDF: 10 pages
Proc. SPIE 5648, Smart Materials III, (16 February 2004); doi: 10.1117/12.580798
Show Author Affiliations
Yoshio Akimune, National Institute of Advanced Industrial Science and Technology (Japan)
Tatsuo Sugiyama, National Institute of Advanced Industrial Science and Technology (Japan)
Kazuo Matsuo, National Institute of Advanced Industrial Science and Technology (Japan)
Rong-Jun Xie, National Institute for Materials Science (Japan)

Published in SPIE Proceedings Vol. 5648:
Smart Materials III
Alan R. Wilson, Editor(s)

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