BM400

BM400 - Lead Zirconate Titanate

Overview
BM400 is a lead zirconate titanate composition with low dielectric loss combined with excellent piezoelectric properties. These properties make it attractive for applications requiring large mechanical drive amplitudes.The material can also be exposed to highly-repetitive quasi-static loads.

Features

  • Low dielectric loss
  • Excellent piezoelectric properties

Applications

  • Large mechanical drive amplitudes
  • Sonar projectors, • Hydrophones
  • Depth sounders, • Communication
  • Linear arrays
  • Level, flow measurement
  • Flaw detection (NDE)
  • Thickness measurement
  • Accelerometers, • Actuators
  • Transducers, • Sterilizers, • Cleaners
  • Degreasers, • Alarms
     
PROPERTY SYMBOL BM400 UNITS
Electrical1      
Relative Dielectric Constant   KT33 1350 —
Dissipation Factor   Tan d 0.4 %
Piezoelectric
Coupling Factor   kp 0.6 —
  k31 0.35 —
  k33 0.7 —
Charge Constant   d31 -125 10-12 C/N
  d33 300 10-12 C/N
Voltage Constant   g31 -10.5 10-3 Vm/N
  g33 25 10-3 Vm/N
Mechanical Quality Factor   QM 500 —
Frequency Constants 2   Np 2150 Hz.m
  N1 1650 Hz.m
  N3 1900 Hz.m
Elastic Modulus
Compliance   SE11 12.5 10-12 m2 /N
  SE33 15 10-12 m2 /N
Density   r 7.6 g/cm3
Curie Temperature   Tc 350 °C
Ageing Characteristics 3 (% change/time decade)
Coupling Factor   kp -2.5 —
Dielectric Constant   kT33 -6 —
Frequency Constant   Np

1.5

 Hz.m

BM400 Series ceramics

BM400 Series ceramics

Notes:
1  Low field parameters;
    measured at 1 KHz

2  NP - Planar
    N1 - Longtitudinal
    N4 - Thickness

3  Reference point of time;
    24 hours after polarization