Piezo Material Properties

Following are the available piezoelectric properties for the specific type of piezoceramic used in the standard QuickPack® strain actuators. Please consult Midé for properties of custom QuickPack® devices.

Properties

Property	Symbol	Units	Value
			All Strain & Bimorph Actuators	qp21b & qp22b Bimorph Actuators
Dielectric Constant (1 KHz)	K		1800	3250
Dielectric Loss Factor(1 KHz)	tanôe	%	1.8	2.0
Curie Point	Τc	0C	350	260
Density	p	kg/m3	7700	7700
Coercive Field*	Ec	KV/cm	14.9	10.6
Coupling Coefficients	Kp K33 K31 Kt		0.63 0.70 0.30 0.40	0.69 0.73 0.40 0.53
Piezoelectric Charge Coefficients (Displacement Coefficient)	d33 d31	(or)	350 -179	550 -285
Piezoelectric Voltage Coefficient(Voltage Coefficient)	g33 g31		24.2 -11.0	19.0 -9.0
Elastic Modulus	Y Y		6.9 5.5	6.3 5.0

Definitions

tanôe	Dielectric Loss Factor	p	Mass Density of Ceramic
Τc	Curie Point	l	Length (m)
d33	Direct Charge Coefficient	w	Width (m)
d31	Transverse Charge Coefficient	t	Thickness (m)
g31	Transverse Voltage Coefficient	Ec	Coercive Field
g33	Direct Voltage Coefficient	εo	Permittivity of free space
Kp	Planar Electromechanical Coupling Coefficient	K33	Direct Electromechanical Coupling Coefficient
K31	Transverse Electromechanical Coupling Coefficient	Y	Direct Youngs Modulus
K	Free Dielectric Constant Measured Along Poling Axis	Y	Elastic Modulus

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For more information:

Please email Conor Clery (Products), or call: 781-306-0609 x292