Relation of the external mechanical stress to the properties of piezoelectric materials for energy harvesting

• Published in: Journal of the Korean Physical Society Vol. 63; no. 12; pp. 2319 - 2324
• Main Authors: Jeong, Soon-Jong, Kim, Min-Soo, Lee, Dae-Su, Song, Jae-Sung, Cho, Kyung-Ho
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2013; 한국물리학회
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Micro-power harvesting; Piezoelectric property; Piezoelectric ceramics; Power generation
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.63.2319

We investigated the piezoelectric properties and the generation of voltage and power under the mechanical compressive loads for three types of piezoelectric ceramics 0.2Pb(Mg 1/3 Nb 2/3 )O 3 -0.8Pb(Zr 0.475 Ti 0.525 )O 3 (soft-PZT), 0.1Pb(Mg 1/3 Sb 2/3 )O 3 - 0.9Pb(Zr 0.475 Ti 0.525 )O 3 (hard-PZT) and [0.675Pb(Mg 1/3 Nb 2/3 )O 3 -0.35PbTiO 3 ]+5 wt% BaTiO 3 (textured-PMNT). The piezoelectric d 33 coefficients of all specimens increased with increasing compressive load. The generated voltage and power showed a linear relation and square relation to the applied stress, respectively. These results were larger than those calculated using the simple piezoelectric equation due to the non-linear characteristics of the ceramics, so they were evaluated with a simple model based on a non-linear relation.