Dielectrophoretically structured piezoelectric composites with high aspect ratio piezoelectric particles inclusions

作者: D. A. van den Ende , S. E. van Kempen , X. Wu , W. A. Groen , C. A. Randall

DOI: 10.1063/1.4729814

关键词:

摘要: Piezoelectric composites were prepared by dielectrophoretic alignment of high aspect ratio piezoelectric particles in a thermosetting polymer matrix. A level was achieved the cured composite from resin containing randomly oriented particles. Upon application an electric field during curing resin, found to rotate with their long axes direction field, before coalescing form chains. The dielectric and properties structured are well described analytical model for arranged into influence degree rotation individual as spacing is this model. results correlate experimental values both permittivity constants poling direction. Dielectric significantly improved respect dispersed ceramic powder–polymer maximum g33 shifted lower volume fraction. could have implications development (nano-)fiber dielectrics such embedded capcitors, piezoelectrics sensing energy harvesting applications.

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