Journal of Electronic Materials

, Volume 46, Issue 1, pp 101–106

Preparation and Characterization of BaTiO3–PbZrTiO3 Coating for Pyroelectric Energy Harvesting

  • R. M. Raghavendra
  • K. P. S. S. Praneeth
  • Soma Dutta
Article
  • 106 Downloads

Abstract

Harvesting energy from waste heat is a promising field of research as there are significant energy recovery opportunities from various waste thermal energy sources. The present study reports pyroelectric energy harvesting using thick film prepared from a (x)BaTiO3–(1 − x)PbZr0.52Ti0.48O3 (BT–PZT) solid solution. The developed BT–PZT system is engineered to tune the ferro to paraelectric phase transition temperature of it in-between the phase transition temperature of BaTiO3 (393 K) and PbZrTiO3 (573 K) with higher pyroelectric figure-of-merit (FOM). The temperature-dependent dielectric behavior of the material has revealed the ferro- to paraelectric phase transition at 427 K with a maximum dielectric constant of 755. The room-temperature (298 K) pyroelectric coefficient (Pi) of the material was obtained as 738.63 μC/m2K which has yielded a significantly high FOM of 1745.8 J m−3 K−2. The enhancement in pyroelectric property is attributed to the morphotopic phase transition between tetragonal and rhombohedral PZT phases in the BT–PZT system. The developed BT–PZT system is capable of generating a power output of 1.3 mW/m2 near the Curie temperature with a constant rate (0.11 K/s) of heating. A signal conditioning circuit has been developed to rectify the time-varying current and voltage signals obtained from the harvester during heating cycles. The output voltage generated by the pyroelectric harvester has been stored in a capacitor for powering wearable electronics.

Keywords

Pyroelectricity barium titanate lead zirconate titanate energy harvesting power output 

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Copyright information

© The Minerals, Metals & Materials Society 2016

Authors and Affiliations

  • R. M. Raghavendra
    • 1
  • K. P. S. S. Praneeth
    • 1
  • Soma Dutta
    • 1
  1. 1.Materials Science, Council of Scientific and Industrial ResearchNational Aerospace LaboratoriesBangaloreIndia

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