Electroactive properties of flexible piezoelectric composites

Materials Research

Walter Katsumi Sakamoto²  Edmilson De Souza¹  Dilip K. Das-gupta¹ 

[1] ,Universidade Estadual Paulista Departamento de Física e Química Ilha Solteira SP ,Brasil

关键词: sensors;    piezoelectricity;    pyroelectricity;    composites;    complex permittivity;    discharge current;   

DOI  :  10.1590/S1516-14392001000300010

来源: SciELO

【 摘 要 】

A flexible piezoelectric composite with 0-3 connectivity, made from Lead Zirconate Titanate (PZT) powder and vegetable-based polyurethane (PU), was doped with small amount of semiconductor powder. As a result a composite with 0-0-3 connectivity was obtained. The nature of absorption and steady state electrical conduction and the dielectric behaviour have been studied for this ceramic/polymer composite. The dielectric loss processes of the composite were observed to be dominated by those the polymer. Adding a semiconductor phase in the composite the electrical conductivity can be controlled and a continuous electric flux path could be created between the PZT grains. This composite may be poled at low voltage and in shorter time compared with composites without a conductive phase.

【 授权许可】

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