孟祥睿,汪守刚,龚彭真,马新灵,魏新利

• 1:郑州大学 机械与动力工程学院，河南 郑州 450001

摘要(Abstract)：

针对铁电聚合物材料电热制冷能力弱、需要高电场诱导极化等问题，在聚合物基体中引入高极化纳米陶瓷粉末，利用溶液浇铸法制备了陶瓷-聚合物复合铁电材料。通过微观结构表征、介电与铁电性能分析陶瓷掺杂量对复合材料整体性能的调控机制；利用唯象理论计算锆钛酸钡钙/聚偏氟乙烯-三氟乙烯-氯氟乙烯(BCZT / P(VDF-TrFE-CFE))复合材料在室温下的绝热温变以及电热强度。结果表明：当陶瓷质量分数大于12% 时，会影响聚合物基体分散的均匀性，导致纳米颗粒发生团聚，引起漏电流效应。界面电荷的贡献以及陶瓷颗粒分散在聚合物基体中作为电荷核产生局部电场，进一步促进内部偶极子的翻转。在不同的陶瓷质量分数的复合材料中，当陶瓷质量分数为9% 时，复合材料的电热性能最优，在35 ℃、电场强度为48 MV×m^-1时表现出4.36 K的高绝热温度变化，其电热强度可达0.091 K×m×MV^-1。

关键词(KeyWords)： 电热制冷;纳米陶瓷;聚合物;电热强度

Abstract:

Keywords:

基金项目(Foundation): 河南省科技攻关项目(182102210015)

作者(Author): 孟祥睿,汪守刚,龚彭真,马新灵,魏新利

DOI: 10.3969/j.issn.1003-9015.2023.00.001

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