Effect of surface modification of ferroelectric ceramic component on the properties of PZT-type/epoxy piezoelectric composite with spiral structure

Abstract

A PZT-type ceramic/epoxy resin piezoelectric composite with spiral structure was fabricated by a roll forming-curling method. The ceramic component surface was modified by silane coupling agent KH560 or titanate coupling agent NDZ201 before the spiral ceramic ring was compounded with epoxy matrix. Interface defects are reduced after some time of surface modification. The effects of the two coupling agents on the properties of composites were discussed and compared. The d33 and the hydrostatic figure of merit (FOM) of the composites with KH560 are 7.5% and 29.5% higher than those prepared without the coupling agent. However, the d33 and FOM of the composites treated by NDZ201 are lower than those prepared without the coupling agent. The different structures of the molecular layer at the interface of silane coupling agents and titanate coupling agents play a key role in the different effects on the properties.