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采用熔压法,将聚偏氟乙烯(PVDF)和超细银粉(Ag)复合,制备了PVDF/Ag复合材料。通过阻抗分析测试了复合材料的电性能,并用扫描电镜表征了复合材料的微观形态。结果表明,随着Ag粉体积分数的增加,复合材料的介电性能提高。当银粉体积分数15.5%,频率在100 Hz时,复合材料的介电常数可达58。在频率为102~105Hz下,复合材料的介电常数表现出较好的频率稳定性,同时低的无机填充量,使PVDF/Ag保持了聚合物理想的柔韧性。
The PVDF / Ag composites were prepared by the fusion method of polyvinylidene fluoride (PVDF) and ultrafine silver (Ag). The electrical properties of the composites were tested by impedance analysis. The microstructure of the composites was characterized by scanning electron microscopy. The results show that with the increase of Ag powder volume fraction, the dielectric properties of the composites increase. When the volume fraction of silver powder is 15.5% and the frequency is 100 Hz, the dielectric constant of the composites can reach 58. The dielectric constant of the composites shows better frequency stability and low inorganic loading at the frequency of 102 ~ 105Hz, which makes the PVDF / Ag maintain the ideal flexibility of the polymer.