Electrocaloric properties of Zr-modified Pb(Mg1/3Nb2/3)O3 polycrystalline ceramics

In this work, electrocaloric properties of Pb ( Mg 1/3 Zr 2x/3 Nb 2(1-x)/3) O 3-x/3 polycrystalline ceramics for different stoichiometric compositions have been investigated. The results show that largest changes (ΔT) are in range of 1.07 to 4.84 K in 10 kV cm-1 electric field change. These values are significantly large, and are comparable with values of other lead-containing ceramics under the same or larger electric field shift. The conclusion is that these materials are excellent candidates for working materials in refrigeration and liquefaction devices in a wide temperature range.