Hydrostatic piezoelectric properties of 1-3 type piezo-composite with a porous polymer matrix

ABSTRACT

Piezoelectric sensors for underwater sonar require high hydrostatic piezoelectric properties (d_h, g_h and HFOM), and research is being conducted on various types of piezoelectric composites to improve them. In this study, research was conducted to improve the hydrostatic piezoelectric properties of 1–3 type piezoelectric composites using PZT piezoelectric ceramics and polymers. First, the appropriate material and volume fraction of the piezoelectric ceramic were selected through numerical analysis, and then experimental specimens were produced by applying various porosity of the polymer matrix. As a result of the experiment, it was confirmed that d_h increased by 75% as the porosity of the polymer matrix increased. This phenomenon was analyzed to be caused by a change in elastic modulus. In addition, g_h and HFOM also increased by 70% and 210% as the porosity of the polymer matrix increased. These results experimentally demonstrated that controlling the porosity of the polymer matrix is useful for improving the hydrostatic piezoelectric properties of type 1–3 piezoelectric composites.

KEYWORDS:

• 1-3 type piezo-composite
• hydrostatic piezoelectric properties
• polymer matrix
• porosity
• numerical analysis

Acknowledgments

The authors acknowledge the financial support from the Virtual Engineering Platform Project of the Ministry of Trade, Industry and Energy(MOTIE) of Korea(grant number : P0022336) and KICET own policy project.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The work was supported by the Ministry of Trade, Industry and Energy .