Effect of electric conduction phase on acoustic absorptionproperty of the piezoelectric composite

In order to research new environmental acoustic materials , the piezoelect ric , elect ric conduction andacoustic absorption composite was prepared by dispersing the carbon black powder (CB) into the polyvinyl chloride( PVC) mat rix with lead zirconate titanate ( PZT) on the basis of piezoelect ricity and elect rical conductivity theory.The dynamic mechanical , elect ric and acoustic properties of the composite were measured and analyzed. The energydissipation mechanism of piezoelect ric and acoustic absorption route of the composite were studied. The result s showthat the acoustic absorption property of the piezoelect ric and elect ric conduction composite reaches the highest valuewhen the volume f raction of carbon black is 4 %.