Journal
JOURNAL OF APPLIED PHYSICS
Volume 115, Issue 1, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.4861031
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Funding
- Department of Science and Technology (DST), New Delhi
- Indian National Science Academy (INSA), India under INSPIRE Faculty Award [ENG-01)-2011]
- European Research Council under the European Union's Seventh Framework Programme [320963]
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This article demonstrates the colossal energy harvesting capability of a lead-free (Bi0.5Na0.5)(0.915)-(Bi0.5K0.5)(0.05)Ba0.02Sr0.015TiO3 ceramic using the Olsen cycle. The maximum harvestable energy density estimated for this system is found to be 1523 J/L (1523 kJ/m(3)) where the results are presented for extreme ambient conditions of 20-160 degrees C and electric fields of 0.1-4 MV/m. This estimated energy density is 1.7 times higher than the maximum reported to date for the lanthanum-doped lead zirconate titanate (thin film) system. Moreover, this study introduces a generalized and effective solid state refrigeration cycle in contrast to the ferroelectric Ericson refrigeration cycle. The cycle is based on a temperature induced polarization change on application of an unipolar electric field to ferroelectric ceramics. (C) 2014 AIP Publishing LLC.
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