Development on Lithium Niobate High-Frequency (18.5MHz) Standard Ultrasonic Transducer

Using lithium niobate piezoelectric crystal as material, developed standard ultrasonic transducer with resonant frequency of 18.5MHz. The output power of high-frequency standard ultrasonic transducer was measured at the national benchmark unit. The experimental results show that radiation acoustic of the transducer is greater than 33.4mS; The square of coefficient that input voltage squared U² relates to the output power P is 0.9999, the linearity is excellent. The stability of acoustic radiation is better than 1.5%.