Views: 62 Author: Site Editor Publish Time: 2024-07-25 Origin: Site
Piezoelectric composites are a special type of material that is made of inorganic piezoelectric ceramics and polymers (such as epoxy resins or active polymers) in a certain volume ratio, mass ratio, and different connection methods.
This material combines the excellent piezoelectric properties of inorganic piezoelectric materials and the excellent processing properties of polymer materials, and can exhibit piezoelectric effect without treatment such as stretching. The piezoelectric properties of piezoelectric composites are isotropic inside the film, so they can exhibit the same piezoelectric properties in any direction.
Piezoelectric Composite Material
According to different connection methods, there are many types of piezoelectric composites: the common ones are 0-3, 1-1, 1-3, and 2-2. In these types, the first number indicates the connection dimension of the piezoelectric material, and the second number indicates the connection dimension of the polymer. This classification method helps describe how the piezoelectric effect of the material is affected in various directions.
Piezoelectric composites have important engineering value and application prospects due to their wide application in sensors, energy conversion devices, and vibration control systems.
Low crosstalk sound pressure: Piezoelectric composites can effectively suppress lateral vibration and reduce crosstalk sound pressure, which is beneficial to improve the accuracy and performance stability of sensors and probes.
Low mechanical quality factor Q value: Low Q value means that the material can effectively dissipate energy during vibration, which helps to reduce the resonance phenomenon of the vibration system and improve the stability and anti-interference ability of the system.
Large bandwidth: Piezoelectric composites have a wide operating frequency band and can process signals of multiple frequencies, which is suitable for wide-band application scenarios.
Large electromechanical coupling coefficient: The high electromechanical coupling coefficient of the material means that electrical energy can be efficiently converted into mechanical vibration or vice versa, which improves energy conversion efficiency and sensitivity.
High sensitivity: The high sensitivity and excellent signal-to-noise ratio of piezoelectric composites make them perform well in detection and sensing applications, and can capture tiny signals and improve measurement accuracy.
Stable characteristics over a large temperature range: The material has good temperature stability and can maintain stable electromechanical properties under a wide range of temperature conditions, which is suitable for long-term use in various environments.
Easy to process: Piezoelectric composite materials are easy to process and form complex probe structures, and can meet diverse design requirements through simple cutting and filling techniques.
Easy to match with materials of different acoustic impedances: The material can be effectively matched with a variety of materials with different acoustic impedances, such as water or steel, and is suitable for acoustic sensing and control systems in complex environments.
Piezoelectric composites are widely used in many fields due to their superior performance characteristics, mainly including the following aspects:
Medical Ultrasonic Sensors:
Piezoelectric composites have important applications in medical ultrasonic sensors. Compared with traditional ceramic sensors, piezoelectric composite sensors have higher sensitivity in water and static piezoelectric constant. In photoacoustic imaging, these sensors can significantly improve the signal-to-noise ratio and bandwidth, providing support for high-definition imaging. In medical ultrasound, piezoelectric composite shell focusing sensors reduce impedance and increase focusing strength, making ultrasonic imaging more accurate and reliable.
Acoustic Sensors:
Piezoelectric composites are widely used in acoustic sensors, which can convert sound waves into electrical signals to achieve sound detection and measurement. This application is particularly important in acoustic positioning, environmental monitoring and industrial sound control.
Ultrasonic Transducers:
In ultrasonic transducers, piezoelectric composites can effectively convert electrical energy and acoustic energy into each other. In the fields of medical ultrasonic diagnosis, ultrasonic cleaning, etc., these materials are widely used to transmit and receive ultrasonic waves, with efficient energy conversion and excellent signal transmission characteristics.
Piezoelectric motor:
Piezoelectric composites play a role in piezoelectric motors, which can convert electrical energy into mechanical energy to drive the device to move. This application is of great significance in the drive system of micro motors and precision instruments, and is widely used in automation equipment and precision positioning technology.
In summary, piezoelectric composites not only show excellent performance in medical ultrasound imaging and sensor technology, but also play a key role in acoustic sensing, ultrasonic technology and piezoelectric motors. Its versatility and excellent performance characteristics make it one of the indispensable and important materials in modern science and engineering.
Weifang Jude is a professional piezoelectric composite material manufacturer, dedicated to the research, development, production and sales of high-performance piezoelectric composite materials. The company has advanced production equipment and a technical team that can customize a variety of piezoelectric composite material solutions that meet customer needs.
Weifang Jude's products are widely used in medical ultrasound, acoustic sensors, ultrasonic equipment and other industrial fields, and have won the trust and praise of customers for their stable performance and excellent quality.
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