This power supply is characterized by making the output of piezoelectric actuator to be controlled automatically and the range of the output is wide,so that it is suitable to the piezoelectric devices based on the principle of anti piezoelectric effect as well as the application field in the aim of static displacement.
Three pairs of frequencies can be obtained as measuring the admittance circle of a piezoelectric crystal. The vibration modes and frequency characters of sonic motor, transducers and piezoelectric devices can been analyzed by making use of these frequencies.
Experiments show that the driving power is suitable for the piezoelectric miropump and other small piezoelectric devices based on the principle of anti-piezoelectric effect in dynamic application.
Since the Mile brothers discovered the piezoelectricity in 1880,the equipments of piezoelectricity have already been used in the sonar, ultrasonic, sensor technique and new type motion machine etc.
ZnO thin film is used widely and effectively in the fields of surface acoustic wave devices, solar cell, gas sensors, varistors and so on because of its excellent piezoelectrical performance.
The emphasis are put on the chemical form-ulaes, performence parameters and potential applications of piezoelectric ceramic materials used for high power transducers, SAW devices, gyroscopes and filters.
In order to realize the co-sintering with Ag/Pd electrodes in multilayer devices, PZNPZT piezoelectric ceramics were prepared by a conventional technique in the sintering temperature range from 1100℃ to 1140℃ and their piezoelectric and dielectric properties were carefully studied. The results show that soaking time is the most important factor concerning with piezoelectric and dielectric properties, d33 increases from 420× 10-12C/N to 560x 10-12C/N and T33 increases from 2100 to 2900 with the increase of soaking time.
Various piezoelectric devices, which form an inseparable part in the progress of modern communication devices, television, radars, and several kinds of defence technology are being produced by the thousands in developed countries all over the world.
Analysis of the insulating, piezoelectric, and mechanical properties of the samples demonstrates that there is a group of solid solutions that are promising materials for high-temperature piezoelectric devices operating in the medium-frequency band.
Simulating the response of piezoelectric devices requires solving coupled electrical and mechanical partial differential equations.
A shape-memory-alloy actuator which memorizes the linear shape was used to realize a driving amount larger than those of electrostatic actuators and piezoelectric devices.
The films thus produced show a step forward in developing piezoelectric devices using more economic routes.
The focusing of the microbeads is done automatically by moving the objective with a piezoelectric device mounted on the nosepiece of the microscope.
For better penetration of elastic cell membranes, a simple piezoelectric device is described.
The advantages of the ultrasonic linear motor are high resolution, no magnetic noise generation due to the DC characteristics of the piezoelectric device, high servo rigidity, high holding torque and none additional brake system.
This paper describes our design solution with a simple fabrication process for a water-immersible piezoelectric device, which separates the bottom electrode from the top electrode by having a narrow ditch covered with PZT film.
A piezoelectric device for measuring the pressures in weak air shock waves due to blasting
The state-of-the-arts of high stbability piezoelectric ceramic materials are reviewed in this artical.The emphasis are put on the chemical form-ulaes, performence parameters and potential applications of piezoelectric ceramic materials used for high power transducers, SAW devices, gyroscopes and filters.
A bidirectional power supply for piezoelectric actuator was proposed and studied,which can apply high bidirectional voltage to the piezoelectric actuator continuously from negtive to positive.This power supply is characterized by making the output of piezoelectric actuator to be controlled automatically and the range of the output is wide,so that it is suitable to the piezoelectric devices based on the principle of anti piezoelectric effect as...
A bidirectional power supply for piezoelectric actuator was proposed and studied,which can apply high bidirectional voltage to the piezoelectric actuator continuously from negtive to positive.This power supply is characterized by making the output of piezoelectric actuator to be controlled automatically and the range of the output is wide,so that it is suitable to the piezoelectric devices based on the principle of anti piezoelectric effect as well as the application field in the aim of static displacement.The operational principle of the power supply and its circuit are described and analyzed in this paper.The theoretical estimation formulas are derived and the experimental results and applications are given.
The development of piezoelectric devices and their applications depends on the renewing of piezoelectric materials and improvement of performance. With the appearance of new materials and new techniques, the applications of piezoelectric devices are changed with each passing day. This paper introduces some new applications and techniques of piezoelectric materials.
压电器件
piezoelectric devices
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