Imperial College London
Alternate

ProfessorNeilAlford

Faculty of Engineering, Department of Materials

Professor of Materials
 
 
 
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Contact

 

+44 (0)20 7594 6724n.alford

 
 
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Assistant

 

Ms Karen Murphy +44 (0)20 7594 3330

 
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Location

 

2..05 (in RSM)Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Le:2016:10.1063/1.4950790,
author = {Le, Goupil F and Alford, NM},
doi = {10.1063/1.4950790},
journal = {APL Materials},
title = {Upper limit of the electrocaloric peak in lead-free ferroelectric relaxor ceramics},
url = {http://dx.doi.org/10.1063/1.4950790},
volume = {4},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The electrocaloric effect (ECE) of two compositions (x = 0.06 and 0.07) of (1 − x)(Na0.5Bi0.5)TiO3-xKNbO3 in the vicinity of the morphotropic phase boundary is studied by direct measurements. ΔTmax = 1.5 K is measured at 125 °C under 70 kV/cm for NBT-6KN while ΔTmax = 0.8 K is measured at 75 °C under 55 kV/cm for NBT-7KN. We show that the “shoulder,” TS, in the dielectric permittivity, marks the upper limit of the ECE peak under high applied electric fields. These results imply that the range of temperature with high ECE can be quickly identified for a given composition, which will significantly speed up the process of materials selection for ECE cooling.
AU  - Le,Goupil F
AU  - Alford,NM
DO  - 10.1063/1.4950790
PY  - 2016///
SN  - 2166-532X
TI  - Upper limit of the electrocaloric peak in lead-free ferroelectric relaxor ceramics
T2  - APL Materials
UR  - http://dx.doi.org/10.1063/1.4950790
UR  - http://hdl.handle.net/10044/1/39956
VL  - 4
ER  -
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