手性化合物S811的强热释效应及反铁电特性

摘要

用热释电流谱、介电温谱、电滞回线谱、差示扫描量热仪(DSC)、热台偏光显微镜(PLM)对手性化合物S811的电学性能及相变行为进行了研究.热释电流谱、介电温谱显示S811在相变附近具有强热释电电流,其最大热释电系数达到384nC/(cm2·K),介电常数在相变过程也发生了突变.电滞回线谱显示,在冷却过程依次出现了反铁电体-铁电体转变的双电滞回线和单电滞回线,揭示了S811作为热释电探测材料的应用潜力,拓展了其应用范围.%The electrical properties and phase transition behaviors of chiral compound S811 have been investigated by pyroelectric, dielectric, polarization spectroscopy, DSC and PLM at different temperatures. It is found that S811 appeared a large pyroelectric current peak and a sharp growth of dielectric constants near the phase transition temperature The maximum value of the pyroelectric coefficient p obtained is 384nC/(cm2 · K). In the cooling process, the sample presented the transition of anti-ferroelectric to ferroelectric phase. The outstanding pyroelectric performances of S811 make it possible as a novel pyroelectric detectors.