Performance of K0.5Na0.5NbO3-LiSbO3-CaTiO3 ceramics in acoustic energy harvesting exposed to sound pressure

Anuruddh Kumar, Anshul Sharma, Rajeev Kumar, Rahul Vaish, C. R. Bowen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, a numerical investigation is carried out for K0.5Na0.5NbO3-LiSbO3-CaTiO3 ceramics for harvesting low frequency sound. For the numerical simulation, a quarter wavelength straight tube resonator with a rectangular cross section was modelled and piezoelectric laminated cantilever bimorph plates placed inside the system at uniform distance. With the application of acoustic sound pressure of a resonant frequency at the opening of tube resonator, the amplified acoustic pressure inside the tube vibrates piezolaminated bimorph plates placed inside the tube, thus generating a voltage on the surface of the piezoelectric layer. In order to generate more voltage and power in the acoustic harvesting system, multiple piezolaminated cantilever plates are placed inside the straight tube resonator. The lead-free piezoelectric material of K0.5 Na0.5 NbO3 (KNN) family i.e. K0.5Na0.5NbO3-LiSbO3-(2wt %) CaTiO3 (KNN-LS-CT) was explored as a piezoelectric material for the acoustic energy harvesting system. With the application of acoustic sound pressure of 1dB at the opening of the tube, an output voltage of maximum 3.8 V is measured numerically at resonant frequency of 194 Hz while the maximum power calculated is 2 µW. The numerical results reveal the potential of the lead-free piezoelectric materials for acoustic energy harvesting applications.

Original languageEnglish
Pages (from-to)149-159
Number of pages11
JournalFerroelectrics
Volume504
Issue number1
DOIs
Publication statusPublished - 13 Nov 2016

Fingerprint

Energy harvesting
sound pressure
Acoustics
Acoustic waves
ceramics
tubes
acoustics
Piezoelectric materials
cantilever plates
Resonators
resonators
energy
Natural frequencies
Electric potential
Lead
resonant frequencies
electric potential
Wavelength
low frequencies
Computer simulation

Keywords

  • Acoustic energy harvesting
  • array of harvesters
  • lead-free piezoelectric material
  • straight tube resonator

Cite this

Performance of K0.5Na0.5NbO3-LiSbO3-CaTiO3 ceramics in acoustic energy harvesting exposed to sound pressure. / Kumar, Anuruddh; Sharma, Anshul; Kumar, Rajeev; Vaish, Rahul; Bowen, C. R.

In: Ferroelectrics, Vol. 504, No. 1, 13.11.2016, p. 149-159.

Research output: Contribution to journalArticle

Kumar, Anuruddh ; Sharma, Anshul ; Kumar, Rajeev ; Vaish, Rahul ; Bowen, C. R. / Performance of K0.5Na0.5NbO3-LiSbO3-CaTiO3 ceramics in acoustic energy harvesting exposed to sound pressure. In: Ferroelectrics. 2016 ; Vol. 504, No. 1. pp. 149-159.
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