Premium
Large‐Temperature‐Invariant and Electrocaloric Performance of Modified Barium Titanate for Solid‐State Refrigeration
Author(s) -
Patel Satyanarayan,
Chauhan Aditya,
Vaish Rahul
Publication year - 2016
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201600103
Subject(s) - electrocaloric effect , refrigeration , materials science , barium titanate , ceramic , atmospheric temperature range , ferroelectricity , invariant (physics) , solid state , thermodynamics , engineering physics , composite material , optoelectronics , dielectric , mathematics , physics , mathematical physics
Enormous advances have been made to enhance the electrocaloric responses of ferroelectric materials, and new advanced composites transcend the 50 K mark. However, such progress has ignored the need for temperature‐invariant performance, which is essential for continuous cooling. In this regard, we propose the use of Sr‐modified bulk ceramics with the nominal composition Ba 0.85 Ca 0.15− x Sr x Ti 0.9 Zr 0.1 O 3 (0< x <0.15). The material with x =0.075 displayed electrocaloric cooling of (0.7±0.05) K over a wide temperature range of 60 K (303–363 K) at 33 kV cm −1 .