Abstract

The contribution of piezoelectric materials in electrical and electronic devices is increasing day by day owing to their promising unique characteristics. Here, polyvinylidene fluoride (P VDF) films were deposited on carbon fabric through solution cast technique. The evolution of ferroelectric β-phase in the films is controlled by the composition of the casting solution, number of layers of the films and drying conditions. The deposited films were characterized by FT IR, XRD, DSC, optical microscopy and open circuit voltage and closed-circuit current. The use of a hydrated salt in the casting solution, higher number of layers and drying in an oven at 50 °C results in higher content of β-phase. The observations depict that using this simple technique of deposition the output voltage and output current can be tailored as 95 V to 296 V and 1.5 μA to 5 μA for variable force.

摘要

由于压电材料的独特特性，压电材料在电气和电子设备中的贡献与日俱增。在这里，聚偏二氟乙烯（P VDF）薄膜通过溶液浇铸技术沉积在碳织物上。薄膜中铁电 β 相的演化受流延溶液的组成、薄膜的层数和干燥条件的控制。通过FT IR、XRD、DSC、光学显微镜以及开路电压和闭路电流对沉积薄膜进行了表征。在浇铸溶液中使用水合盐、更多的层数和在 50 °C 的烘箱中干燥会导致更高的 β 相含量。观察结果表明，使用这种简单的沉积技术，可以将输出电压和输出电流调整为 95 V 至 296 V 和 1。