Component - Piezoelectric Sensor (Quartz Crystal) - [Vickers]
Choose the appropriate onePiezoelectric materialIt is the key to designing high-performance sensors. Generally, the following aspects should be considered:
(1) Conversion performance: Has a high coupling coefficient or a large piezoelectric constant.
(two) Mechanical performance: As a load-bearing component, piezoelectric elements are expected to have high mechanical strength and stiffness in order to achieve a wide linear range and high natural vibration frequency.
(3) Electrical performance: We hope to have high resistivity and large dielectric constant in order to reduce the influence of external distributed capacitance and obtain good low-frequency characteristics.
(4) Good temperature and humidity stability: with a high Curie point, it is expected to achieve a wide range of operating temperatures.
(5) Time stability: The piezoelectric properties do not change over time.
From the above aspects,quartzIt is a good piezoelectric material. Except for its low piezoelectric constant, quartz has significant advantages in other properties, with a Curie point of 573 ° C; The temperature coefficient of piezoelectric constant is 10 within the range of 20~200 ° C-6/C order of magnitude; High elasticity coefficient; High mechanical strength, if the grinding quality is good, it can withstand 700~1000 kg/cm2The pressure and drift under the impact force are also relatively small. Given the above characteristics, quartz crystal components are mainly used to measure large amounts of force and acceleration or asStandard sensorsuse.
