Fabrication of flexible piezoelectric PMN-PT based composite films for energy harvesting

National Conference on Processing and Characterization of Materials

Das, Satyabati^1 ; Biswal, Asutya Kumar^1 ; Roy, Amritendu^1

School of Minerals, Metallurgical and Materials Engineering, Indian Institute of Technology, Bhubaneswar, India^1

关键词: Lead magnesium niobate;    Mechanical pressing;    Output voltages;    Phase purity;    Piezoelectric composite;    Pyrochlore phase;    Self-powered sensing;    Well-dispersed;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/178/1/012020/pdf
DOI  :  10.1088/1757-899X/178/1/012020

来源: IOP

【 摘 要 】

Flexible piezoelectric composite films of lead magnesium niobate and lead titanate (PMN-PT) ceramic and multiwalled carbon nanotube (MW-CNT) in the matrix of polyvinyldene fluoride (PVDF) were fabricated for green energy harvesting and self-powered sensing. Compositions of PMN-PT was varied from 10-50 volume (vol. %) in PVDF matrix while a constant concentration of MW-CNT was maintained (1vol. %). Phase purity of the synthesized composites was confirm by X-ray diffraction (XRD) analysis. PMN-PT powder was found to be in single phase without the presence of any additional peak, which generally arises due to crystallization of another pyrochlore phase. Surface morphology study by scanning electron microscopy (SEM) revealed a well dispersed PMN-PT/CNT in PVDF matrix. The maximum measured output voltage and current during mechanical pressing and releasing conditions were found to be ∼ 3 volt and 30 nA, respectively in 30 vol. % PMN-PT composite.