Studies of Relationships between Elastic Modulus and Damping Performance in Piezoelectric Damping Composites.

Facile Fabrication of a Flexible LiNbO3 Piezoelectric Sensor through Hot Pressing for Biomechanical Monitoring

“…As shown in Figure h, the addition of LN did not obviously change the mechanical strength of the PP film, while the LN/PP films doped with MWCNTs (1 wt %) showed a higher tensile modulus. This result indicates that the LN/MWCNT/PP film has better mechanical strength than the LN/PP film, which may be because MWCNTs act as reinforcing agents in composite materials, as reported previously. , The improved mechanical strength not only makes the PCF sensor more durable but also increases its piezoelectricity because MWCNTs can reinforce the stress applied to LN particles in the PCF sensor due to their enhanced tensile modulus, , effectively reducing the negative impact of polymer deformation on the piezoelectricity of the PCF sensor …”

“…28,29 The improved mechanical strength not only makes the PCF sensor more durable but also increases its piezoelectricity because MWCNTs can reinforce the stress applied to LN particles in the PCF sensor due to their enhanced tensile modulus, 30,31 effectively reducing the negative impact of polymer deformation on the piezoelectricity of the PCF sensor. 26 3.2. Piezoelectric Properties of the PCF Sensor.…”

“…Moreover, the relatively large modulus of PP (ca. 1 GPa) is expected to reduce the negative effect of polymer deformation on the sensor sensitivity and afford fast response times, as an increase in the elastic modulus of a composite material can lead to enhanced piezoelectricity. , The MWCNTs dispersed in PP are expected to play an important role in improving the piezoelectric properties because of their conductivity and good mechanical properties. Therefore, LN/MWCNT/PP PCF sensors are expected to be self-powering with high sensitivity, fast response time, and good stability.…”

Electrical and dynamic mechanical behavior of BaTiO3/VGCF/LDPE composite

“…In the α relaxation region, except for some fluctuation in low VGCF content (0-3 vol%), the loss factor shows a single peak form with the maximum at the composite of 8 vol% VGCF content. Such a damping peak at a critical content of electrically conductive filler is usually interpreted as the experimental verification of the piezo-damping effect, since a matched electrical conductivity is essential for effective piezo-damping [5][6][7][8][9][10]. Therefore, the piezo-damping effect really functions in BaTiO 3 /VGCF /LDPE composites but only in some conditions (e.g.…”

“…Over the last decades, a new damping material of piezoelectric ceramic powder and electrically conductive particle-filled polymeric composite has been developed and has attracted great attention, as the composite can show both a high loss factor and a high stiffness [2][3][4][5][6][7][8][9]. The damping mechanism of the reported composite is assumed to be due to the energy transferring effect through cooperation among its components.…”