• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Effect of dopants on the electrocaloric effect of 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 ceramics
 
  • Details
  • Full
Options
2015
Journal Article
Title

Effect of dopants on the electrocaloric effect of 0.92 Pb(Mg1/3Nb2/3)O3-0.08 PbTiO3 ceramics

Abstract
This paper presents an extract of modifications of lead magnesium niobate-lead titanate in order to optimize its electrocaloric properties. Electrocaloric entropy (DSEC) and temperature changes (DTEC) are measured in a temperature range from −5 °C up to 100 °C using differential scanning calorimetry. The influence of dopants (Li+, Mn2+, Sr2+, Ta5+) on the electrocaloric effect as well as on microstructure, dielectric and ferroelectric behavior is investigated. The maximum of relative permittivity can be shifted to lower or higher temperatures depending on the added dopant and decreased ferroelectric hysteresis losses were observed for all altered compositions. For the undoped PMN-8PT ceramics maximum DTEC of 0.58 K and DSEC of 0.51 J kg−1 K−1 were measured, when applying an electric field of 2 kV mm−1 at 30 °C. The electrocaloric temperature change showed lower values for all doped PMN-8PT. Remarkably, this is accompanied with an increase of the entropy change for the Li-doped sample.
Author(s)
Molin, Christian  
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Sanlialp, M.
Universität Duisburg-Essen, Center for Nanointegration
Shvartsman, Vladimir
Universität Duisburg-Essen, Center for Nanointegration
Lupascu, Doru Constantin
Universität Duisburg-Essen, Center for Nanointegration
Neumeister, Peter
Schönecker, Andreas
Gebhardt, Sylvia  
Journal
Journal of the European Ceramic Society  
DOI
10.1016/j.jeurceramsoc.2015.01.016
Language
English
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Keyword(s)
  • electrocaloric effect

  • direct electrocaloric measurement

  • PMN-PT

  • dielectric properties

  • relaxor ferroelectrics

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Contact
© 2024