A number of properties of natural rubber-based composites containing fillers of sol–gel glasses and ceramics from the CaO–SiO₂–P₂O₅ system were investigated and compared. Its goals were to evaluate and select more suitable usages in flexible electronics, in particular as substrates and insulating layers in antennas for wireless communications. The fillers were characterized by XRD, SEM, adsorption–texture characteristics and particle size distribution. The composites were characterized by their vulcanization, physico-mechanical, dielectric and dynamic characteristics, as well as their volume resistivity and coefficient of thermal conductivity. The studies revealed that the specific features of the fillers, above all their texture characteristics (specific surface area, presence and amount of micro- and mesopores) have a significant impact upon all studied properties of the composites. The complex evaluation has demonstrated that the composites containing glass–ceramic fillers, especially at 20–50 phr, are more suitable as substrates and insulating layers in flexible antennas for wireless communications.

中文翻译：

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CaO-SiO 2 -P 2 O 5体系中含有溶胶-凝胶玻璃和玻璃-陶瓷填料的天然橡胶复合材料

包含CaO-SiO ₂ -P ₂ O ₅的溶胶-凝胶玻璃和陶瓷填料的天然橡胶基复合材料的许多性能系统进行了调查和比较。其目标是评估和选择在柔性电子产品中更合适的用途，尤其是用作无线通信天线中的基板和绝缘层。填料通过XRD，SEM，吸附结构特征和粒度分布进行表征。复合材料的特征在于其硫化，物理机械，介电和动态特性，以及其体积电阻率和导热系数。研究表明，填料的特殊特征，尤其是其所有的结构特征（比表面积，微孔和中孔的存在以及数量）对复合材料的所有研究性能都有重大影响。复杂的评估表明，含有玻璃陶瓷填料的复合材料，