有机-无机压电材料是一种分子铁电体, 具有柔性、结构灵活、易成膜、全液相合成及环保节能等优点, 可满足新一代薄膜器件及可穿戴设备的需求。该文以三甲基卤代甲基铵(TMXM, X=F, Cl, Br)为有机部分, MnCl2为无机部分, 通过溶液蒸发法制备了具有钙钛矿分子结构的有机-无机压电材料三甲基氯三氯化锰(TMCM-MnCl3), 并对其分子结构组成、压电、热学、声学及铁电性进行表征。结果表明, TMCM-MnCl3的压电常数为106 pC/N, 居里温度为130 ℃, 声阻抗值约为16.5 MRayl, 低于压电陶瓷PZT-4(大于33 MRayl), 具有广阔的应用前景。

The organic-inorganic piezoelectric material is a kind of molecular ferroelectric with the advantages of flexibility, flexible structure, easy film formation, solution phase synthesis, environmental protection and energy saving, etc., and can meet the needs of a new generation of thin film devices and wearable devices. In this paper, the organic-inorganic piezoelectric material TMCM-MnCl3 with perovskite molecular structure were prepared by the solution evaporation method with trimethyl halomethyl ammonium (TMXM, X=F, Cl, Br) as the organic part and MnCl2 as the inorganic part. The molecular structure, piezoelectric, thermal, acoustic and ferroelectric properties were characterized. The results show that the piezoelectric constant d33 is 106 pC/N, the Curie temperature is 130 ℃, and the acoustic impedance is about 16.5 MRayl, which is lower than that of the piezoelectric ceramics PZT-4(great than 33 MRayl), and it has broad application prospects.