Pyroelectric performance of [Bi0.48Na0.4032K0.0768]Sr0.04(Ti0.975Nb0.025)O3 ceramics


In the present work, the pyroelectric performance of [Bi0.48Na0.4032K0.0768]Sr0.04(Ti0.975Nb0.025)O3 (BNT-2.5Nb) ceramics is investigated. At room temperature, the value of pyroelectric coefficient found as 13.2 × 10−4 C/m2 K which is higher than many lead-free ferroelectric materials. Further, the pyroelectric figures of merit (FOMs) for detectivity (Fd), voltage responsivity (Fv), current responsivity (Fi), and energy harvesting (Fe*) are calculated. BNT-2.5Nb ceramics show pyroelectric open circuit voltage as 0.45 V when it was exposed to temporal temperature gradient. This work result indicates that the Nb-doping in Bi0.5Na0.5TiO3-based composition can be beneficial for lead-free pyroelectric device applications.

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Rahul Vaish acknowledges the support from the Indian National Science Academy (INSA), New Delhi, India, through a grant by the Department of Science and Technology (DST), New Delhi, India under the INSA Young Scientists Award. Satyanarayan Patel would like to acknowledge sponsorship provided by the Alexander-von-Humboldt Foundation.

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Srikanth, K.S., Singh, V.P., Patel, S. et al. Pyroelectric performance of [Bi0.48Na0.4032K0.0768]Sr0.04(Ti0.975Nb0.025)O3 ceramics. J Aust Ceram Soc 56, 395–402 (2020).

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  • Pyroelectric
  • Lead-free
  • Dielectric