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Fused silica roller for tempering furnace: what is the acoustic element of electric ceramics?

Time:2019/11/9 10:40:17 Click on:

The electrical ceramic acoustic element, especially a lead-free piezoelectric ceramic acoustic element, is mainly composed of a metal sheet and a piezoelectric ceramic sheet. The metal sheet surface is closely connected with two or more piezoelectric ceramic sheets of the same size and closely connected in turn. The polarization direction of the adjacent piezoelectric ceramic sheets is opposite. The acoustic pressure produced by the piezoelectric sounder of this new structure is It is directly proportional to the number of piezoelectric ceramic flakes. The more the number, the greater the sound pressure. By increasing the number of piezoelectric ceramic flakes, the required loud pressing can be easily realized. The production process is simple and the production cost is low.


In the late 1990s, in order to meet the needs of manufacturing high-frequency ceramic filters and ceramic resonators above 10 MHz, material researchers replaced lead titanate ceramic materials with a small amount of lanthanum oxide, and added manganese, niobium and cerium ions. Electrical ceramics obtained modified lead titanate ceramic materials with good high-frequency response and good temperature stability. Their electrical properties were the same as those of Murata in Japan at the same time At the same time, lead titanate piezoelectric ceramic materials suitable for high-temperature ultrasonic transducers have been developed, which have been successfully used in oil deep well exploration and flowmeter in high-temperature environment.


Electrical ceramics are acoustic devices that transmit and receive ultrasonic waves. They are widely used in water and air medium. They play the role of radar in underwater acoustic communication. They are called sonar. They are essential and important sensors for all kinds of ships. In industry, ultrasonic transducers have been used in ultrasonic cleaning, ultrasonic precision processing, ultrasonic humidification, ultrasonic emulsification, ultrasonic seed processing, ultrasonic flaw detection and super Acoustic diagnosis, etc. Nowadays, another widely used field of piezoelectric ultrasonic transducer is telemetry, remote control system and alarm system.


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