Piezo electric elements
Piezoelectric ceramic element, commonly known as piezo buzzer element . Piezo electric elements sheet is an electronic element that make sound (piezo pronunciation). Piezoelectric ceramic dielectric material is placed between two copper circular electrodes. When AC audio signal is connected on the two electrodes, the piezoelectric sheet will vibrate according to the size and frequency of the signal and produce corresponding sound. Because of its simple structure and low cost, piezoelectric ceramics are widely used in electronic and electrical appliances , such as pronunciation electronic watches, electronic instruments, electronic clocks, timers,toys, etc.
Piezoelectric ceramic sheet is an piezo element that make sound. FBelec Piezoelectric ceramic dielectric material is placed between two copper circular electrodes. When AC audio signal is connected on the two electrodes, the piezoelectric sheet will vibrate according to the size and frequency of the signal and piezo pronunciation. Because of its simple structure and low cost, piezoelectric ceramics are widely used in electronic and electrical appliances, such as pronunciation electronic watches, electronic greeting card,electronic book,electronic instruments, electronic clocks, timers,toys, etc. Contact FBelec sales team for more details about our piezoelectric ceramic element right here!
Properties of piezo ceramics
The relationship between the applied force and the resuting response of the piezoelectric element depends on: the piezoelectric properties of piezoceramic, the size and shape of the sample, the direction of electrical and mechanical excitation.
By their nature, piezoelectric materials are anisotropic crystals. Figure 3 shows the different directions and orientation axes of the piezoelectric material. Axes 1, 2 and 3 are the corresponding analogs of the X, Y, Z axes of the classical orthogonal coordinate system, while the axes 4, 5, and 6 define the axes of rota- tion. The direction of axis 3 is the direction of polarization This direction is established during production by means of a high constant voltage that is created between the electrodes.
Video: Production of miniaturized piezo transducers
Video: Ultrasonc piezo tranducers, pumps, medical equipment applications & technology
Piezo transducers & components connectors
The piezoelectric element is characterized by the following properties:
a) Relative dielectric constant b) Resonance frequency c) Electromechanical coupling constant d) Elastic constanta) Relative dielectric constant
The relative dielectric constant is the ratio of the dielectric permittivity of the material (in this case E33T and E11T) to the dielectric permittivity of a vacuum
b) Resonance frequency
The natural frequency f0 of the plate by thickness calculated by the fllowing formula
c) Electromechanical coupling constant
The electromechanical coupling coefficients kp, k33, k15, kt and k31 describe the ability of the piezoelectric element to convert energy from electrical to me- chanical and vice versa.The square of the electromechanical coupling coefficient is defined as the ratio of the accumulated converted energy of one type (mechanical or electrical) to the input energy of the second type (electrical or mechanical). The index shows the relative directions of electrical and mechani- cal quantities and the type of oscillations. They can be associated with the mode of oscillations of a simple transducer
d) Elastic constant
The elastic properties of piezoelectric materials are characterized by elastic compliance (elastic compliance) or elastic siffness (elastic siffness). Elastic com- pliance determines the amount of strain due to an applied mechanical stress. Due to the fact that under the infuence of mechanical stress, the ceramic gen- erates an electrical response, which counteracts the resultant strain, the effective Young's modulus for a short circuit of electrodes is less than open circuited.
Applications for Piezo Ceramic Element
Piezoelectric materials have found application in a wide range of areas, such as medical instruments. control of industrial processes, semiconductor manu- facturing systems, household electrical appliances, communication control systems, various measuring instruments, and other areas. Commercial systems that use piezoelectric materials - pumps, sewing machines, sensors (pressure, icing, angular velocities, etC.), optical instruments, laser printers, motors for autofocus cameras, and many others. In this case, the scope of these materials is constantly growing. Using a piezoelectric element is usually reduced to four categories: sensors, generators, power actuators, and transducers.
In generators, piezoelectric materials can generate a voltage suflcient to cause a spark between the electrodes, and thus can be used as electrodes to ignite the fuel, for gas stoves and for welding equipment. Altermatively, the electrical energy generated by the piezoelectric elements may accumulate. Such genera-tors are excellent solid batteries for electronic circuits.
In sensors, piezoelectric materials convert physical parameters such as acceleration, pressure, and vibrations into an electrical signal. In actuators, piezoelectric materials convert an electical signal into a precisely controlled physical displacement, clearly setting the accuracy of mechanical tools, lenses, and mirrors.
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12mm 9.2KHZ piezo electric elements
FT-12T-9.2A1
FBelec Piezoelectric ceramic sheet, commonly known as piezo buzzer element or piezo diaphragmPiezoelectric ceramic sheet is an electronic pronunciation element. Piezoelectric ceramic dielectric material is placed between two copper circular electrodes. When AC audio signal is connected on the two electrodes, the piezoelectric sheet will vibrate according to the size and frequency of the signal and produce corresponding sound. Because of its simple structure and low cost, piezoelectric ceramics are widely used in electronic and electrical appliances, such as toys, pronunciation electronic watches, electronic instruments, electronic clocks, timers and so on.
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12mm 5.8KHZ feedback ultrasonic bender
FT-12T-5.8B1
Self drive piezo element, namely three pole piezo element or piezo disc, it is made of substrate (copper,steel,iron,alloy) and piezoelectric ceramic piece with feedback pole processing, only three contact points, can weld positive and negative three lines, one pole is the feedback pole. FBelec produce self drive piezo element are commonly used to produce active buzzers.
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15mm 6.0KHZ brass piezo electric elements
FT-15T-6.0A1
External Drive piezo element, namely two pole piezo element or piezo disc, it is made of substrate (copper,steel,iron,alloy) and piezoelectric ceramic piece processing, only two contact points, can weld positive and negative two lines. Other buzzer is usually used for passive buzzer, FT-15T-6.0A1, 15T stands for diameter of 15mm, frequency of 6.0khz. The frequency of the acoustic element is determined by the thickness. The thinner the thickness, the higher the frequency. piezo element is a voltage element, that is to say, the greater the voltage applied to the device, the louder the device will be. The sound of the piezo element is extremely clear. FBelec China leading provider of piezo disk of various sizes and frequencies
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20mm 3.5KHZ brass external ceramic piezo transducer
FT-20T-3.5A1
The main component of the piezo element is piezoelectric ceramic, so it is called piezoelectric element. Ft-20t-3.5a1 is an External Drive Piezo element with diameter of 20mm and frequency of 3.5khz. In many cases, wire can be welded on the Piezoceramic Components, which can be customized according to the needs of different customers. The External Drive Piezo element can only rely on IC signals, or inductance circuits to match the frequency signal to sound. In general, iron buzzer will be much cheaper than copper buzzer. FBelec's buzzer tablet price is the most advantageous among all factory in China.
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dia 20mm 6.5KHZ brass piezo ceramic element
FT-20T-6.5A1
Piezoelectric element is a piezoelectric ceramic plate which is pasted on the vibrating metal plate after high pressure extreme pressure. When the ac voltage is added, the piezoelectric effect will cause mechanical deformation, stretching and contraction, and the use of this feature to make the metal sheet vibration and sound. 1. Peripheral support mode - the outer diameter edge of the buzzer piece is fixed in the resonance cavity. Generally, no feedback piezoelectric sensor is adopted, and the Piezoelectric Disk must be matched with the frequency of the resonance cavity to have a high sound pressure output, and the external oscillation circuit generates a driving signal to make the buzzer sound. 2. Node support mode - the buzzer plate is fixed in the annular structure of about the same size as the diameter of ceramic plate. If the resonator cavity is properly designed and matched with the correct frequency feedback piezoelectric diaphragms and positive feedback circuit, the sound pressure and correct frequency can be generated. FBelec is your best Choose of suppliers, factories, wholesalers, distributors!
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20mm 3.6KHZ brass piezo element
FT-20T-3.6A1
soldering technology of piezo element：As we all know, Piezoelectric Disk can be used for soldering.The welding process requirements of FBelec's loud piezo ceramic element are as follows:First, the piezoelectric element must be checked carefully, and only qualified products can be used.Secondly, do not touch the piezo tone with bare hands, and be sure to wear rubber gloves, because the sweat on your hands will corrode the piezo sensor and cause oxidation.Furthermore, the solder joints are required to be full and round,smooth,There is no virtual welding and false welding, and there is no sharpening of the solder joints.False soldering will cause the lead to fall off,the position of red, black and yellow lines should not be welded wrong!Finally, the silver-plated coating is particularly vulnerable to damage, so soldering should be done quickly.FBelec's piezoelectric element can be customized, no matter what specification you need, same quality as Murata's FBelec will do the best to meet you.
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27mm 4.0KHZ internal piezo electric elements
FT-27T-4.0A1
Precautions for soldering piezo element with electric iron: The soldering of the piezo film requires the use of a soldering iron. So what are the precautions when soldering the piezoelectric film with the soldering iron? FBelec sorted out the following points: The first point is that the new electric soldering iron should be tinned before use, and the resistance value of the multimeter should be confirmed to be between 2~3kΩ. The second point is that when using an electric soldering iron, general，Soldering iron temperature: 350 ± 5 ° C, welding time: within 3.0 ± 0.5 seconds The third point is that it is strictly forbidden to beat the soldering iron arbitrarily during use. Fourth, during the soldering process, the electric soldering iron should not be placed everywhere, and should be placed on the soldering iron stand when not soldering. The fifth point, after the end of use, the power should be cut off in time, and then put the soldering iron back into the toolbox after cooling. FBelec's soldering technology is first-class and trustworthy in China,FBelec also can supply electric soldering iron, looking forward to your consultation,Our Tel: 18868647636
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dia 27mm 4.0KHZ internal feedback piezo sounder
FT-27T-4.0B1
How to identify the direction of the positive and negative for the piezo film? Generally, the positive and negative of the piezo element can not be divided. If the piezoelectric element is to be used for induction, the positive and negative must be divided. Usually the positive side is facing up. You can use a pointer multimeter to set it to 25V by mechanical means, gently pinch both sides of the piezo with your left thumb and index finger, hold two test pens in your right hand, the red pen is close to the silver side of the piezoelectric sensor, and the black pen is placed horizontally on the wearable piezoelectric generator. The metal surface of the chip, then the left thumb and index finger are pressed firmly, and then released, two voltage signals with opposite polarities are successively generated on the ceramic piezo vibration sensor, so that the pointer swings to the right - back to zero - swing to the left - back to zero, swing The amplitude is about 0.1~0.15V. In this case, the piezo element is the positive superposition. If the order of the pointer swing is left swing - back to zero - right swing - back to zero. In this case, the sensor piezoelektrik is positive overshoot. Under the same pressure, the larger the pointer swing, the higher the sensitivity of the piezoelectric element .