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科学通报  2014 

高温压电复合材料换能器

DOI: 10.1360/N972014-00244, PP. 3156-3161

Keywords: 压电复合材料,温度稳定性,超声换能器

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Abstract:

探讨了高温压电复合材料超声换能器中材料的温度性能问题.首先测量了一种改性的具有较高居里温度的压电陶瓷和一种具有耐高温性能的聚合物的材料常数随温度的变化曲线,然后利用ANSYS有限元软件模拟计算了1-3型压电复合材料的谐振频率和阻抗特性等受温度的影响,并根据优化仿真模型制备了1-3型高温压电复合材料晶片及相应的超声换能器.研究表明,所研制的1-3复合晶片性能参数随温度变化的结果和数值模拟预期的结果吻合较好.与非复合的压电陶瓷换能器相比,采用1-3复合结构的高温压电换能器具有更宽的频带和更高的灵敏度.本项工作对于研发宽频带、高灵敏度的耐高温压电复合材料超声换能器具有参考价值.

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