Manufacture of high temperature ultrasonic transducers and their performance test
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摘要: 通过高温环境对超声探头性能影响的分析，提出优化楔块、晶片材料选型及组装工艺，以提高超声探头高温性能的稳定性。选择声速随温度变化缓慢的楔块材料，根据工件和楔块使用环境温度下的声速进行楔块参数设计，以减小温度对探头角度及检测定位的影响；选择居里温度大于使用环境温度的晶片材料及玻璃化温度较高的高温环氧树脂作为复合晶片填充材料，以提高探头高温环境灵敏度的稳定性；探头的组装采用高温黏结胶水和梯度温度固化工艺，以提高其高温环境的使用寿命。对制作的一批高温探头进行性能测试，验证了上述分析结果。Abstract: Through analysis on the influence of high temperature on the performance of ultrasonic transducers, measures to optimize the selection of wedge and piezoelectric material, as well as the assembly process are proposed to improve the high temperature performance of ultrasonic transducers. The wedge material with slow change of sound Velocity-Temperature and the parameter design according to the velocity of operating temperature are selected to reduce the influence of temperature on transducers angle and position. The piezoelectric material with Curie temperature greater than operating temperature and epoxy with higher glass transition temperature are selected as composite piezoelectric fillers. In order to improve the sensitivity and stability of the transducers in high temperature environment, the probe assembly uses high temperature bonding glue and gradient temperature curing process to improve its service life in high temperature environment. A batch of high-temperature probe performance tests was performed to verify the above analysis results.
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Keywords:
- high temperature /
- ultrasonic transducer /
- wedge /
- piezoelectric /
- assembly
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