POLARIZATION OF THICK POLYVINYLIDENE FLUORIDE/TRIFLUOROETHYLENE COPOLYMER FILMS
POLARIZATION OF THICK POLYVINYLIDENE FLUORIDE/TRIFLUOROETHYLENE COPOLYMER FILMS
复制标题
聚偏二氟乙烯/三氟乙烯共聚物厚膜的偏振
DOI：
10.1063/1.363356
复制
发表时间：
1996
影响因子：
3.2
通讯作者：
J. Lewiner
中科院分区：
文献类型：
--
作者：
H. Chan;Z. Zhao;K. Kwok;C. Choy;C. Alquié;C. Boué;J. Lewiner
用于传感器应用的厚（800 μm）聚偏氟乙烯/三氟乙烯（P（VDF-TrFE））共聚物膜在高温下施加电压进行极化。通过使用不同的热处理，极化温度和极化时间，我们能够制备在1.3 MHz处具有单一谐振峰的均匀极化膜，或具有两个谐振（1.3和2.6 MHz）的非均匀极化膜，或具有在2.6 MHz处具有单一谐振的双压电晶片结构的膜。用压力波传播法检验了阴极电荷注入引起的非均匀极化。在这些厚膜中的偏振机制预计将类似于以前报道的薄膜。在这项工作中获得的结果可能会导致实际应用，因为他们建议的一种手段，通过极化控制换能器频率。
Thick (800 μm) polyvinylidene fluoride/trifluoroethylene (P(VDF‐TrFE)) copolymer films for transducer applications are poled under applied voltage at elevated temperatures. By using different heat treatments, poling temperatures, and poling time, we are able to prepare a uniformly poled film with a single resonance peak at 1.3 MHz, or a nonuniformly poled film with two resonances (1.3 and 2.6 MHz), or a film with bimorph structure with a single resonance at 2.6 MHz. The nonuniform polarization which arises from charge injection from the cathode is checked by the pressure wave propagation method. The polarization mechanisms in these thick films are expected to be similar to those previously reported for thin films. The results obtained in this work may lead to practical applications because they suggest a means for controlling transducer frequency by poling.