It was found that the ceramics for x=0.050 0 sintered at 1 102℃possess a piezoelectric constant d33 of 117 pC/N,electromechanic coupling factors kt of 34%、kp of 25% and k33 of 41%, a relative dielectric constant T33e/e0 of?
After the substitution of Ba 2+ the optimized electrical properties of 0.5PMnS0.5PZN ceramics are as follows: a piezoelectric constant d_ 33 =406 pC/N, a electromechanical coupling factor k_p= 0.55, a dielectric constant εT__ 33 /ε__0=2183, a mechanical quality factor Q_m=1077 and a dielectric loss tanδ=0.27%.
A piezoelectric vibrator was prepared by traditional piezoelectric materials of Pb(Mn1/3Sb2/3)O3 - Pb(Zr1-xTix)O3(MS-PZT) with high K15(0.71) , Qm(2100) and Ec(l 860 V/mm) . A new combustion jetting system was produced by sticking the vibrator to the nozzle of the internal combustion engine.
Piezoelectricity of single-and multi-layer cellular polypropylene film electrets
The piezoelectricity of a pressure-treated cellular polypropylene (PP) (commercially available, trade name PQ50) film electret was studied by the measurement of direct-and inverse-piezoelectric d33 coefficient.
The average of pressure peak, as measured by piezoelectricity pressure transducer, increased versus distance to thrust wall before fully-developed detonation came into being.
Piezoelectricity in crystallizing ferroelectric polymers: Poly(vinylidene fluoride) and its copolymers (A review)
The piezoelectricity observed in poly(vinylidene fluoride) (PVDF) and its copolymers involves three components that are associated with the presence of at least two phases (crystalline and amorphous) in the polymer structure.