Multilayer 0.9Pb(Mg<sub>1/3sub>Nb<sub>2/3sub>)O<sub>3sub>-0.1PbTiO<sub>3sub> elements for electrocaloric cooling

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• 作者：Lovro Fulanović<sup>asup><sup> ; sup><sup>bsup><sup> ; sup><sup>lovro.fulanovic@ijs.si" class="auth_mail" title="E-mail the corresponding authorsup> ; Silvo Drnov&scaron ; ek<sup>asup><sup> ; sup><sup>bsup> ; Hana Ur&scaron ; ič<sup>asup><sup> ; sup><sup>bsup> ; Marko Vrabelj<sup>asup><sup> ; sup><sup>bsup> ; Danjela Ku&scaron ; čer<sup>asup><sup> ; sup><sup>bsup> ; Kostja Makarovič<sup>asup><sup> ; sup><sup>csup> ; Vid Bobnar<sup>asup><sup> ; sup><sup>bsup> ; Zdravko Kutnjak<sup>asup><sup> ; sup><sup>bsup> ; Barbara Malič<sup>asup><sup> ; sup><sup>bsup>
• 关键词：PMN-PT ; Electrocaloric effect ; Multilayer ; Tape casting ; Microstructure
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：37
• 期：2
• 页码：599-603
• 全文大小：1322 K

文摘

Electrocaloric (EC) cooling elements in the form of multilayers (MLs) were prepared. The elements consist of five layers of the relaxor-ferroelectric 0.9Pb(Mg<sub>1/3sub>Nb<sub>2/3sub>)O<sub>3sub>&ndash;0.1PbTiO<sub>3sub>, about 60 μm thick, with internal platinum electrodes and exhibiting a dense, uniform microstructure with a grain size of 1.7 μm. The largest temperature change ΔT<sub>ECsub> of 2.26 K was achieved at an electric field (E) of 100 kV cm<sup>&minus;1sup> and at 105 °C, measured by a high-resolution calorimeter. These results agree well with the indirect measurements. The EC coefficient, ΔT<sub>ECsub>/ΔE, obtained for the MLs, is similar to the value obtained for bulk ceramics of the same composition. The ΔT<sub>ECsub> values above 2 K over a broad temperature range from 75 to 105 °C make the ML elements suitable candidates for EC cooling devices at significantly lower voltages than bulk ceramic plates with comparable dimensions and mass.