Piezoelectric properties of Sr2-XCaXNaNb5O15 (SCNN) ceramics (0.05<X<0.35) for a smart patch

Yoshio Akimune; Tatsuo Sugiyama; Kazuo Matsuo; Rong-Jun Xie

doi:10.1117/12.580798

16 February 2004 Piezoelectric properties of Sr_2-XCa_XNaNb₅O₁₅ (SCNN) ceramics (0.05

Yoshio Akimune, Tatsuo Sugiyama, Kazuo Matsuo, Rong-Jun Xie

Proceedings Volume 5648, Smart Materials III; (2004) https://doi.org/10.1117/12.580798
Event: Smart Materials, Nano-, and Micro-Smart Systems, 2004, Sydney, Australia

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.

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Yoshio Akimune, Tatsuo Sugiyama, Kazuo Matsuo, and Rong-Jun Xie "Piezoelectric properties of Sr_2-XCa_XNaNb₅O₁₅ (SCNN) ceramics (0.05https://doi.org/10.1117/12.580798

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