Several major piezoelectric materials and properties
Publish Time: 2018-08-07 Origin: Site
Since 1880, French physicists P. Curie and J. Curie have discovered the Piezoelectric effect piezo element.The current piezoelectric effect materials can be roughly divided into three categories,it is piezoelectric single crystals, including ferroelectric Piezoelectric discs transducer,non-ferroelectric type piezoelectric single crystal and new piezoelectric material, including organic polymer material, pressure electrical films, piezoelectric semiconductors, and piezoelectric composites. The most commonly used piezoelectric materials are piezoelectric single crystals.it is quartz piezoelectric ceramics. PzT piezoelectric ceramics have better piezoelectric characteristics and higher electromechanical coincidence coefficients. but it has the disadvantages of high density, fragile, difficult to process, high acoustic impedance, and difficult to match with air and water.
The PZT material high intensity focused ultrasound is a special name for BaTIO3-based piezoelectric ceramics.According to their different physical and chemical properties, they are divided into different types.According to its physical soft and hard characteristics, Piezoelectric ceramic element can be divided into hard and soft materials. Where PzT-2 ,PzT-4 (including PzT-4A, PzT-4D and PzT-4E) and PzT-8 belong to hard material class; PzT-5 (package) Including PzT-SA, PzT-SD, PzT-SJ, PzT-SH, PzT-sx) are soft materials.
According to the chemical elements, it can be divided into PzT-8 piezo piezoelectric sensor, which belongs to Fe and Ca modified binary materials.It is characterized by low dielectric loss, strong mechanical strength and good stability. It is mainly used for making large sonar.it is type of cleaning machine, powerful ultrasonic processing, emulsification and other transducers. PZT-4, iron-platinum, manganese-calcium modified lead dibasate,It has high electromechanical conversion efficiency and is suitable for ultrasonic processing of high-power ultrasonic generators and ultrasonic cleaning of transducer elements.PzT-5 Piezo element pickup is a La, Nb modified binary material with high sensitivity and good time stability. It is used for various types of receiving hydroacoustic transducers, ultrasonic probes, accelerometers sensors, pressure gauges, buzzers, etc. BT-1, no Lead type. In addition, different manufacturers have their own naming rules, but generally implement uniform industrial standards.