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首页> 外文期刊>Scientific reports. >Enhanced electrocaloric analysis and energy-storage performance of lanthanum modified lead titanate ceramics for potential solid-state refrigeration applications
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Enhanced electrocaloric analysis and energy-storage performance of lanthanum modified lead titanate ceramics for potential solid-state refrigeration applications

机译：增强电热量分析和镧改性钛酸钛陶瓷的储能性能，用于潜在的固态制冷应用

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The unique properties and great variety of relaxer ferroelectrics make them highly attractive in energy-storage and solid-state refrigeration technologies. In this work, lanthanum modified lead titanate ceramics are prepared and studied. The giant electrocaloric effect in lanthanum modified lead titanate ceramics is revealed for the first time. Large refrigeration efficiency (27.4) and high adiabatic temperature change (1.67?K) are achieved by indirect analysis. Direct measurements of electrocaloric effect show that reversible adiabatic temperature change is also about 1.67?K, which exceeds many electrocaloric effect values in current direct measured electrocaloric studies. Both theoretical calculated and direct measured electrocaloric effects are in good agreements in high temperatures. Temperature and electric field related energy storage properties are also analyzed, maximum energy-storage density and energy-storage efficiency are about 0.31?J/cm3 and 91.2%, respectively.
机译：独特的特性和各种各样的松弛剂铁电器使它们在储能和固态制冷技术方面具有高度吸引力。在这项工作中，制备和研究了镧改性钛酸酯陶瓷。第一次揭示了镧改性钛酸钛酸盐陶瓷中的巨型电热效应。通过间接分析实现了大的制冷效率（27.4）和高绝热温度变化（1.67 k）。电热效应的直接测量表明，可逆的绝热温度变化也约为1.67Ω·k，其超过当前直接测量电热量研究中的许多电热效应值。理论计算和直接测量的电热量效应都处于高温的良好协议。还分析了温度和电场相关的能量存储性能，最大储能密度和能量储存效率分别为约0.31ΩJ/ cm3和91.2％。

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