Electrocaloric effect in lead-free relaxor (1-x)(Sr0.7Bi0.2)TiO3+x(Na0.5Bi0.5)TiO3 material system
RIS ID
110413
Abstract
The relationship between electrocaloric effect (ECE) and electrostrictive strain over a broad electric field was studied in (1-x)(Sr0.7Bi0.2)TiO3+x(Na0.5Bi0.5)TiO3 relaxor based lead-free ceramics, where the electric field induced strain can reach the level of 0.28% at 12 MV/m. The experimental data revealed that the composition with highest strain response also generated the largest ECE near room temperature, e.g., ¿S=3.6 J kg¿1 K¿1 and an adiabatic temperature change ¿T=2.4 K at 13 MV/m. This research provides an effective approach for designing new ECE materials.
Publication Details
Li, J., Zhao, X., Xu, Z., Zhang, T., Qian, X., Hou, Y., Yang, L. & Zhang, S. (2017). Electrocaloric effect in lead-free relaxor (1-x)(Sr0.7Bi0.2)TiO3+x(Na0.5Bi0.5)TiO3 material system. Materials Letters, 187 68-71.