Dielectric relaxation and electrical conductivity in ferroelectric ceramic/polymer composites around the glass transition

2012 ◽  
Vol 100 (21) ◽  
pp. 212903 ◽  
Author(s):  
A. Peláiz-Barranco
Keyword(s):  
Electrical Conductivity ◽  
Glass Transition ◽  
Dielectric Relaxation ◽  
Polymer Composites ◽  
Ferroelectric Ceramic

PZT ceramic particles/polyurethane composites formalism for mechanical energy harvesting

2020 ◽  
Vol 89 (3) ◽  
pp. 30901 ◽  
Author(s):  
Abdelkader Rjafallah ◽  
Abdelowahed Hajjaji ◽  
Fouad Belhora ◽  
Abdessamad El Ballouti ◽  
Samira Touhtouh ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Electromechanical Coupling ◽  
Piezoelectric Coefficient ◽  
Mechanical Energy ◽  
Electrical Power ◽  
Ferroelectric Ceramic ◽  
Ferroelectric Ceramics ◽  
High Compliance ◽  
Polyurethane Composites ◽  
Good Agreement

More recently, the ferroelectric ceramic/polymer composites have been progressively replacing ferroelectric ceramics and polymers as they combine their interesting properties. Such as high compliance of polymers and high electromechanical coupling of ferroelectric ceramics those are required for piezoelectric transducer applications. At the same time, the ferroelectric ceramic/polymer composites formalism for predicting their energy-conversion capabilities is of both academic and industrial interest. The novelty of this paper is that the electrical power harvested by the PZT/PU polarized composite has been expressed in terms of the effective longitudinal piezoelectric coefficient (d33) of the composite via a parameter p related to the poling ratio. Besides, the parameter p, that is characterizing the PZT/PU composites with different longitudinal piezoelectric coefficients (d33), was evaluated. The other parameters of the electrical power expression were calculated using the Yamada model for the dielectric, piezoelectric and elastic constants. Finally, a good agreement was found between experience and model.

Electrical conductivity and rheology of carbon fiber/liquid crystal polymer composites

2007 ◽  
Vol 28 (2) ◽  
pp. 168-174 ◽  
Author(s):  
Julia A. King ◽  
Jason M. Keith ◽  
Ryan C. Smith ◽  
Faith A. Morrison
Keyword(s):  
Electrical Conductivity ◽  
Liquid Crystal ◽  
Carbon Fiber ◽  
Polymer Composites ◽  
Liquid Crystal Polymer ◽  
Crystal Polymer
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