期刊
SCRIPTA MATERIALIA
卷 193, 期 -, 页码 97-102出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2020.10.034
关键词
Electrocaloric effect; Multilayer ceramic capacitor; KNN-based ceramic; Direct measurement
类别
资金
- Innovation Guide Fund for Science and Technology of Inner Mongolia Autonomous Region [KCBJ2018034]
- Major Program for Science and Technology of Inner Mongolia Autonomous Region [2019ZD12]
- Support Program for Grassland Talents Innovation Team of Inner Mongolia
- Plan Project for Science and Technology of Baotou [2019P3070]
A relaxor system, KNLNT-0.1CZ, was designed to achieve a high electrocaloric effect in multilayer ceramic capacitors. The study successfully demonstrated a large ΔT and wide T-span, indicating a promising strategy for designing new ECE materials for solid-state cooling.
Herein, 0.9(K0.49Na0.49Li0.02)(Nb0.8Ta0.2)O-3-0.1CaZrO(3) (KNLNT-0.1CZ) relaxor system in multilayer ceramic capacitor (MLCC) are designed to attain elevated electrocaloric effect (ECE). Based on direct measurement, a large Delta T of 2.45 K is achieved in KNLNT-0.1CZ MLCC, which is nearly 10 times higher than that of ceramic counterpart. The temperature span (T-span) on a benchmark of Delta T above 1.5 K come up to 65 degrees C. Such excellent ECE benefits by synergistic effect of relaxor phase transition and high electric field. This study shed light a strategy on designing new ECE materials with large Delta T and wide T-span for solid-state cooling. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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