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  • Categories:Material
  • Time of issue:2021-11-23 10:20:03
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SYMBOL

DEFINITION

UNITS

εT 33  , εT 11

Free Relative Dielectric Constant

 

εS33  , εs 11

Clamping Relative Dielectric Constant

 

tgδ

Dissipation Factor at Low Field

 

ρ

Density

g/cm 3

T c

Curie Point

ºC

V

Velocity

m/s

Z a

Acoustic Impedance

Mrayl

K p, K 33, K t, K 31, K 15

Electromechanical Coupling Factors

 

N p , N 33, N 31, N 15, N t, N c

Frequency Constants

Hz - m

d 33, d 31, d 15

Piezoelectric Strain Constants

10 -12 C/N

d h

Hydrostatic Piezoelectric Strain Constants

10 -3 Vm/N

Q pm

Mechanical Quality Factor at Planar mode

 

Y E11 , YE33

Young's Modulus under Short Circuit

10 10 N/m 2

σ

Poisson Ratio

 

εT 33  (% Per Decade)

Aging Rate of Free Relative Dielectric Constant

 

K p (% Per Decade)

Aging Rate of Planar Electromechanical Coupling Factor

 

K t (% Per Decade)

Aging Rate of Coupling Factor at Thickness mode

 

N p (% Per Decade)

Aging Rate of Frequency Constant of Planar Mode

 

N t (% Per Decade)

Aging Rate of Frequency Constant at Thickness Mode

 

εT33  

Thermal Stability of Free Relative Dielectric Constant

 

GLOSSARY

 

 

BT

Barium Titanate

 

Hard PZT

Hard Lead Titanate Zirconate Compound

 

Soft PZT

Soft Lead Titanate Zirconate Compound

 

 

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