Title :
Enhancement of piezoelectric activity in P(VDF-TrFE) copolymer using two-step poling
Author :
Chan, H.L.W. ; Zhao, Z. ; Kwok, K.W. ; Choy, C.L.
Author_Institution :
Dept. of Appl. Phys., Hong Kong Polytech., Kowloon, Hong Kong
Abstract :
The piezoelectric property of thick P(VDF-TrFE) copolymer films could be enhanced by a two-step thermal poling method. Two weak resonance peaks were observed after the first poling, while only a single strong resonance was found after the two-step poling process. To study the mechanisms of the polarization process, X-ray diffraction (XRD) and differential scanning calorimetry (DSC) were used. The results were reported
Keywords :
X-ray diffraction; dielectric polarisation; electrets; ferroelectric materials; organic insulating materials; piezoelectric materials; piezoelectric thin films; polymer blends; polymer films; thermal analysis; thermally stimulated currents; P(VDF-TrFE) copolymer; X-ray diffraction; differential scanning calorimetry; piezoelectric activity; polarization process; single strong resonance; two-step poling; two-step thermal poling method; weak resonance peaks; Annealing; Ceramics; Heat treatment; Piezoelectric films; Piezoelectric materials; Piezoelectric transducers; Resonance; Temperature; X-ray diffraction; X-ray scattering;
Conference_Titel :
Electrets, 1994. (ISE 8), 8th International Symposium on
Conference_Location :
Paris
Print_ISBN :
0-7803-1940-0
DOI :
10.1109/ISE.1994.514834
