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Piezoelectric ceramics is a functional
ceramic material obtained by blending, synthesizing, shaping, sintering,
machining, putting electrodes, and polarizing with dc fields. Usually,
it can be used for electro-mechanical transducers, which have broad applications
in communication, home appliances, aeronautics, probing, computers, etc.
The static piezoelectric effect
of piezoelectric ceramics is mainly utilized in piezoelectric lighter,
gas stove, earthquake transducer, ignition/detonation, force shift, displacement,
meters, etc. Its dynamic piezoelectric effect can be used in a wide range
of frequencies, such as underwater sound, ultrasonic sound, information
processing, etc. In the underwater sound frequency range (0.1~102
kHz), it is mainly used for receiving/transmitting transducers in
sonar, fish detector and other underwater equipments. In the ultrasonic
range (102~104 kHz), it is mainly used for ultrasonic
probing, ultrasonic cleaning, ultrasonic diagnosis and treatment, ultrasonic
holographic imaging, and piezoelectric transformer. In higher frequency
range, it is used for filters and resonators.
Our company produces the following piezoelectric
ceramic products: BaTiO3 piezoelectric ceramics, lead-titanate(PT)
piezoelectric ceramics, lead-zirconate-titanate(PZT)piezoelectric ceramics,
ternary system piezoelectric ceramics, high polymer piezoelectric materials,
and compound piezoelectric materials. Among all these products, PT and
PZT have been used to make high- and medium-frequency filters and resonators,
underwater and ultrasonic sound transducers. The ternary system piezoelectric
ceramics include Nb,Sb, Pb(NbMg)O3 system, and Pb(Nb,Co)O3
system, which have higher dielectric constant and electro-mechanical
coupling coefficient, as well as proper mechanical quality factor. The
high polymer piezoelectric material, whose light and soft nature allows
it to be prepared in any dimension or shape to satisfy the customer's
demand for various complicated transducers, has found wide applications
in medical equipments and underwater sound transducers. The compound piezoelectric
material is made into thin films or plates by adding zirconium-titanium-lead
system piezoelectric ceramic powders into the high polymer material.
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