耐γ辐射匹配层的制备及其在超声换能器的应用  

Preparation of matching layer and application forγ-radiation resistant ultrasonic transducer

作　　者：李炫辉 吴俊伟 袁懋诞 李明 刘晓睿[3] 陈燕 纪轩荣 LI Xuanhui;WU Junwei;YUAN Maodan;LI Ming;LIU Xiaorui;CHEN Yan;JI Xuanrong(State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment,School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China;CGN Inspection Technology of Company,Shenzhen 518026,China;Suzhou Nuclear Power Research Institute Co.,Ltd.,Suzhou 215004,China)

机构地区：[1]省部共建精密电子制造技术与装备国家重点实验室、广东工业大学机电工程学院,广州510006 [2]中广核检测技术有限公司,深圳518026 [3]苏州热工研究院有限公司,苏州215004

出　　处：《应用声学》2024年第3期641-647,共7页Journal of Applied Acoustics

基　　金：广东省自然科学基金项目(2023A1515011620);国家自然科学基金项目(51975131,U2133213);广东省“珠江人才计划”引进创新创业团队项目(2016ZT06G375)。

摘　　要：传统超声换能器由于匹配层等有机材料在射线辐照条件下引起化学键断裂而失效,从而影响检测的准确性。为了研制高性能耐辐射超声换能器,该文选择具有良好耐辐射性能的双酚A型环氧树脂作为基体,氧化铝陶瓷粉末作为无机填料,制备了不同氧化铝含量的匹配层(0∼80%),研究了该系列匹配层样品经过γ射线辐照后的颜色、密度、声速、声阻抗和声衰减的变化情况。随着辐照剂量的增加(0∼1000 kGy),样品的颜色逐渐加深,密度几乎保持不变,声速和声阻抗略有提高,声衰减变化不大。基于该匹配层,研制了中心频率为9 MHz的超声换能器,换能器辐照前后信号变化不大,表明该系列匹配层在较大剂量辐照下仍然具有良好的声学性能,是较为优异的耐辐射匹配层材料,具有较好的应用前景。The traditional ultrasonic transducer failure is caused mostly by the chemical bond fracture of organic materials of matching layers,which affects the accuracy of detection.In order to develop high performance radiation-resistant ultrasonic transducers,the matching layers were made by mixing good radiation resistance bisphenol A epoxy resin with different content Al2O3 particles(0–80%).The changes of appearance,density,sound velocity,acoustic impedance and attenuation of the matching layers were investigated under differentγ-ray irradiation from 0 to 1000 kGy.With the increase of radiation dose,the color of the sample gradually was deepened,and the density almost remained unchanged,the sound velocity and acoustic impedance were slightly increased,and acoustic attenuation changed little.In addition,based on the above matching layer,an ultrasonic transducer with a central frequency of 9 MHz has been fabricated,the signal of the transducer almost remain unchanged after irradiation,indicating that matching layers can maintain good acoustic performance under large dose irradiation,which may have a great application potential in the design ofγ-radiation resistant ultrasonic transducer.

关 键 词：双酚A型环氧树脂 匹配层 γ射线辐射 超声换能器 

分 类 号：TB552[理学—物理] TL13[理学—声学]