Darwish Moustafa A, Trukhanov Alex V, Senatov Oleg S, Morchenko Alexander T, Saafan Samia A, Astapovich Ksenia A, Trukhanov Sergei V, Trukhanova Ekaterina L, Pilyushkin Andrey A, Sombra Antonio Sergio B, Zhou Di, Jotania Rajshree B, Singh Charanjeet
Department of Technology of Electronics Materials, National University of Science and Technology "MISiS", Leninskii av., Moscow 4119049, Russia.
Physics Department, Faculty of Science, Tanta University, Al-Geish st., Tanta 31527, Egypt.
Nanomaterials (Basel). 2020 Mar 9;10(3):492. doi: 10.3390/nano10030492.
A pure ferrite and epoxy samples as well as the epoxy/ferrite composites with different 20 wt.%, 30 wt.%, 40 wt.%, and 50 wt.% weight ferrite contents have been prepared by the chemical co-precipitation method. AC-conductivity and dielectric properties such as the dielectric constant and dielectric loss of the prepared samples have been studied. The obtained results showed that the samples had a semiconductor behavior. The dielectric constant of the composites has been calculated theoretically using several models. For the composite sample that contains 20 wt.% of ferrites, these models give satisfactory compliance, while for the composite samples with a higher percentage of nanofillers, more than 30 wt.% theoretical results do not coincide with experimental data. The investigated polymer has very low conductivity, so this type of polymer can be useful for high-frequency applications, which can reduce the losses caused by eddy current. Thus, the prepared samples are promising materials for practical use as elements of microwave devices.
采用化学共沉淀法制备了纯铁氧体和环氧树脂样品，以及铁氧体含量分别为20 wt.%、30 wt.%、40 wt.%和50 wt.%的环氧树脂/铁氧体复合材料。研究了所制备样品的交流电导率以及介电常数和介电损耗等介电性能。所得结果表明，样品具有半导体行为。使用几种模型从理论上计算了复合材料的介电常数。对于含有20 wt.%铁氧体的复合样品，这些模型给出了令人满意的一致性，而对于纳米填料百分比更高（超过30 wt.%）的复合样品，理论结果与实验数据不一致。所研究的聚合物具有非常低的电导率，因此这种类型的聚合物可用于高频应用，这可以减少涡流引起的损耗。因此，所制备的样品有望作为微波器件元件实际应用。
