FRQ
3. Is there a possibility of using piezoceramic actuators at
cryogenic temperatures?
The answer is yes. From down to zero degrees Kelvin, allpiezo
actuators continue to function even though it may appear
counter-intuitive. Since electric fields cannot be changed by
temperature at all and the inter-atomic electric fields are the
basis for the piezoelectric effect, the most common piezoceramics
does decrease due to piezo coupling as temperature drops. Most
importantly the motion of most materials drops to about one-seventh
of that measured at room at liquid helium temperatures.
APPLICATION ANSWER
1.The frequency limit of apiezoceramic sheet and some
properties?
Usually the frequency limits of applications are ascertained
through the resonances involved with the transducer design and its
size and shape. For a piezoceramic sheet, there is no limit for
inherent frequency. A sheet of PSI-5A material which is 2.85″
square, .0075″ thick has planar dilatation mode of about 14 KHz and
of 13 MHz of thickness mode vibration in the neighborhood. Limiting
factors can arise such as the resistive heating of electrodes when
considerable current is gathered at large surface area parts during
ultrasonic frequencies.
2.Is there any truth to piezo transducers being used as static and
dynamic force sensors?
Due to charge leakage the Piezo transducers cannot be used for
static force measurements. For transient force measurements they
can be applied successfully for only0.1 second.
3.The expected life of piezoelectric material?
There are no tests yet that can determine the “fatigue life”. Our
facility has had an operational piezo fan since 1982. Such
calculations must involve voltages and mounting.
4.How does temperature effectpiezoceramic transducers?
The pyroelectric properties of piezoceramic are responsible for the
appearance of voltage through the any piezo transducer electrodes
due to temperature changes. Almost each and every property of
piezoceramics is affected by temperature. There exists no general
manner regarding it. In accordance to your experiment and
calculations, the dependence must be looked upon in that context.
Company introduction:
Established in 1999, Beijing Cheng-cheng Weiye Science and
Technology Co., Ltd is a professional manufacturer in ultrasonic
transducers, ultrasonic equipment and piezoelectric ceramics.
Notably in 2004, we researched and developed our ultrasonic tubular
transducer equipment into a new product that turns the extreme
inconvenience brought about by pipeline and vacuum cleaning into an
easy task. This product has been widely used in distillation, mix
and mill for various chemical procedures and has received much
praise from our customers.
Payment:
We accept paypal or T/T, western union etc.
Shipping:
Normally if your quantity is not too much, we ship out by Fedex
express economy. Or as your requested by sea or other express,
according to your quantity.
Certification: ø
CE, ISO9001, ROSH
