聚四氟乙烯/CaCu3Ti4O12(CCTO)纳米复合材料的介电和热性能

2019 International Conference on High Voltage Engineering and Technology (ICHVET) Pub Date : 2019-02-01 DOI:10.1109/ICHVET.2019.8724343

A. Ashokbabu, P. Thomas

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引用次数: 4

摘要

聚合物-陶瓷复合材料作为高压电容器新材料的开发是电力研究的热点之一。在此基础上，制备了具有高介电常数的聚四氟乙烯(PTFE)基复合材料- cacu3ti4o12 (CCTO)纳米陶瓷，并对其介电和热性能进行了表征。这些纳米复合材料的x射线衍射研究表明，在不同强度下，聚四氟乙烯和CCTO对应的峰存在，这取决于CCTO的负载。差示扫描量热法表明，制备的纳米复合材料的熔点比聚四氟乙烯低约2℃。通过热重分析，发现所有纳米复合材料在500°C下都是稳定的。室温下的介电常数研究表明，在100 Hz-1 MHz范围内，这些纳米复合材料的介电常数没有明显变化。他们还发现在10 kHz时表现出低介电损耗(<0.007)。这些纳米复合材料在高压电容器中的应用前景广阔。

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Dielectric and Thermal Properties of PTFE/CaCu3Ti4O12(CCTO) Nanocomposites

The development of polymer-ceramic composites as new materials for high voltage capacitors is one of the thrust areas of power research. In this connection, polytetrafluoroethylene (PTFE) based composites with a high dielectric constant-CaCu3Ti4O12(CCTO) nanoceramics were prepared in different weight% and characterized for their dielectric and thermal behavior. X-ray diffraction studies of these nanocomposites indicated the presence of peaks corresponding to both PTFE and CCTO at varying intensities which depend on the loading of CCTO. Differential scanning calorimetry showed that the melting point of the prepared nanocomposites is lower than that of PTFE by about 2°C. From thermo gravimetric analysis, all the nanocomposites were found to be stable up to 500°C. Dielectric studies at room temperature showed that the permittivity of these nanocomposites was not changed significantly with frequency in the range 100 Hz-1 MHz. They also found to exhibit low dielectric loss (<0.007) at 10 kHz. These nanocomposites can be further developed for their application in high voltage capacitors.

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2019 International Conference on High Voltage Engineering and Technology (ICHVET)

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