0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 Relaxor Ferroelectrics Modified with Different Dopants for Electrocaloric Cooling Application

被引：0

作者：

Molin, C. ^{[1
]}

Keitel, U. ^{[1
]}

Neumeister, P. ^{[1
]}

Gebhardt, S. ^{[1
]}

Schoenecker, A. ^{[1
]}

机构：

[1] Fraunhofer Inst Ceram Technol & Syst, Dresden, Germany

来源：

2014 JOINT IEEE INTERNATIONAL SYMPOSIUM ON THE APPLICATIONS OF FERROELECTRICS, INTERNATIONAL WORKSHOP ON ACOUSTIC TRANSDUCTION MATERIALS AND DEVICES & WORKSHOP ON PIEZORESPONSE FORCE MICROSCOPY (ISAF/IWATMD/PFM) | 2014年

关键词：

electrocaloric effect; electrocaloric material; PMN-PT; dielectric properties; relaxor ferroelectrics;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In the present work we investigate the influence of acceptor (K+, Cu+, Li+), donor (La3+, Bi3+, Eu3+, Nd3+, Y3+, Cr3+) and charge equivalent dopants (Sr2+, Co2+, Mn2+, Ta5+) on the dielectric and ferroelectric behavior of 0.92 Pb(Mg1/3Nb2/3)O-3 - 0.08 PbTiO3 (0.92PMN-0.08PT). As a criterion for the basic suitability for electrocaloric cooling application, we directly measure the temperature change (Delta T) upon the application and withdrawal of an electric field as a function of the ambient temperature. For the undoped 0.92PMN-0.08PT bulk ceramics fabricated by the columbite route, we observed the maximum Delta T of 0.24 K when applying an electric field of 2 kV.mm(-1) at 28 degrees C (Delta T-up). Withdrawing the electric field at same conditions showed a temperature decrease of 0.20 K (Delta T-down). The resulting Delta T-down: Delta T-up ratio is also considered.

引用

页码：158 / 161

页数：4

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