Chapter 4-Piezoelectric Ceramics
Chapter 4-Piezoelectric Ceramics
Chapter 4-Piezoelectric Ceramics
EBB 443
32 Symmetry Point
Groups
Definition:
S = strain = constant (mechanically clamped)
T = stress = constant (not clamped)
E = field = constant (short circuit)
D = electrical displacement = constant (open circuit)
Flexible piezoelectric materials are attractive
for power harvesting applications because of
their ability to withstand large amounts of
strain.
Larger strains provide more mechanical
energy available for conversion into electrical
energy.
A second method of increasing the amount of
energy harvested from a piezoelectric is to
utilize a more efficient coupling mode.