Sensor Techn. Ltd. BM921

Basic Information

Density:

ρ :

4.40

g/cm³

Curie temperature:

T_C:

290

°C

Material class:

Lead Metaniobate

Reviewed:

Yes

Aging rate(s) [% per decade]:

Dielectric constant:

-0.10

Coupling constant:

-0.50

Resonant frequency:

0.25

Electric Properties

Piezoelectric charge constant(s)

d₃₁:

-7.0

*10^-12 C/N

d₃₃:

65.0

*10^-12 C/N

Piezoelectric voltage constant(s)

g₃₁:

-5.0

*10^-3 Vm/N

g₃₃:

42.0

*10^-3 Vm/N

Dielectric loss factor

tan δ:

0.035

@1000

Dielectric constant(s)

ε₃₃^T:

165

Coupling factor(s):

k_p:

0.10

k₃₁:

0.09

k₃₃:

0.40

Elastic Properties

Compliance(s) S:

S₁₁^E:

*10^-12 m²/N

S₃₃^E:

*10^-12 m²/N

Mechanical Q factor:

Q_m:

600

Frequency constant(s):

N₁:

1675

Hzm

N_P:

3350

Hzm

N_T:

2535

Hzm

Availability

Sensor Technology Limited.

www.sensortech.ca

[email protected]

Applications

Non-Destructive Testing

Thickness Gauges

Medical Ultrasound