中文摘要：

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。

英文摘要：

The electrical properties and phase transition behaviors of chiral compound S811 have been investiga- ted by pyroelectric, dielectric, polarization spectroscopy, I3SC and PLM at different temperatures. It is found that SK11 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.