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首页> 外文期刊>Journal of Materials Science >Electrical characterization of LiTaO3:P(VDF-TrFE) composites
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Electrical characterization of LiTaO3:P(VDF-TrFE) composites

机译：LiTaO3：P（VDF-TrFE）复合材料的电学表征

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摘要

Composites of pyroelectric ceramics and polymers are very important as their unique features and properties can be easily tailored for various specific applications. Lithium tantalatum oxide (LiTaO3, LT), the pyroelectric ceramic powder has been incorporated into a polyvinylidene fluoride-trifluoroethylene [P(VDF-TrFE) 70/30 mol%] copolymer matrix to form 0-3 composites. The composite films were prepared using 'solvent casting' (SC) method to disperse the ceramic powder homogeneously in the P(VDF-TrFE) copolymer matrix with various wt% of LT powder. In order to derive high pyroelectric performance, the samples were poled. Electric properties, such as the dielectric constant, dielectric loss, and pyroelectric coefficient, have been measured as a function of temperature and frequency. In addition, material figures-of-merit, very important factors for assessing many sensor applications have also been calculated. The results show that the fabricated lead free lithium tantalite: P(VDF-TrFE) composite materials have a good potential for pyroelectric infrared sensor applications.
机译：热电陶瓷和聚合物的复合材料非常重要，因为它们的独特特性和性能可以轻松地针对各种特定应用进行定制。钽铁氧化物（LiTaO3，LT），热电陶瓷粉末已掺入聚偏二氟乙烯-三氟乙烯[P（VDF-TrFE）70/30 mol％]共聚物基质中，形成0-3复合材料。使用“溶剂浇铸”（SC）方法制备复合膜，以将陶瓷粉末均匀地分散在具有各种重量百分比的LT粉末的P（VDF-TrFE）共聚物基质中。为了获得高的热电性能，将样品极化。已经测量了电性能，例如介电常数，介电损耗和热电系数，它们是温度和频率的函数。此外，还评估了重要的品质因数，这是评估许多传感器应用的非常重要的因素。结果表明，所制备的无铅钽酸锂：P（VDF-TrFE）复合材料具有良好的热释电红外传感器应用潜力。

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