• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2026, Vol. 62 ›› Issue (10): 83-92.doi: 10.3901/JME.260493

• 仪器科学与技术 • 上一篇    

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基于CCBT压电陶瓷换能器的高温长时在线超声监测

杨振, 李健, 赵柯枫, 陈志成, 胡正, 邱勋林, 项延训   

  1. 华东理工大学机械与动力工程学院 上海 200237
  • 收稿日期:2025-05-05 修回日期:2025-12-18 发布日期:2026-07-29
  • 作者简介:杨振,男,2000年出生,硕士研究生。主要研究方向为耐高温压电超声传感器。E-mail:2232167989@qq.com;邱勋林(通信作者),男,1978年出生,博士,教授,博士研究生导师。主要研究方向为驻极体材料及器件,超声换能器与检测技术。E-mail:xunlin.qiu@ecust.edu.cn
  • 基金资助:
    国家重点研发计划(2022YFF0605605)和国家自然科学基金(12474467,12304511,12025403,52321002)资助项目。

High Temperature Long-term Online Ultrasonic Monitoring Based on CCBT Piezoelectric Ceramic Transducers

YANG Zhen, LI Jian, ZHAO Kefeng, CHEN Zhicheng, HU Zheng, QIU Xunlin, XIANG Yanxun   

  1. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237
  • Received:2025-05-05 Revised:2025-12-18 Published:2026-07-29

摘要: 承压设备在高温工况和流体冲蚀作用下长期服役极易引起材料裂纹萌生与扩展等损伤,因各种原因突发的裂纹会迅速导致在役设备失效并产生灾难性后果。针对目前高温设备通过周期性停机检测模式难以及时发现突发性缺陷的问题,基于Ce掺杂铋层状压电陶瓷(Ce-CaBi4Ti4O15,CCBT)研制了一款耐高温压电超声换能器。研究结果表明,CCBT的居里温度为790 ℃。在室温至450 ℃范围内,其压电d33系数和直流电阻率分别为22 pC/N和250 kΩ·m,且保持优异的热稳定性。热膨胀系数为10.45×10-6/℃,与碳钢,镍铬钢等高温设备常用材料相近,可有效避免热应力导致的结构失效。基于自主搭建的超声监测系统,利用CCBT换能器,结合高温声速修正技术,实现了在460 ℃下对P92钢试样内部1 mm通孔缺陷的长时精准监测,检测误差小于2%,且平均无故障时间达1 008 h。提出的监测技术展现出优异的耐温性能及高温检测精度,为设备的高温长时在线无损监测提供一种可能的解决方案。

关键词: 铋层状压电陶瓷, 压电超声换能器, 超声检测, 高温在线监测, 高温声速修正

Abstract: Long-term service of pressure equipment under high-temperature conditions and fluid erosion can easily induce material damage such as crack initiation and propagation. Sudden appearance of cracks caused by various factors may rapidly lead to operational failure and catastrophic consequences. To address the challenge of timely detection of abrupt defects in high-temperature equipment through conventional periodic shutdown inspections, a high-temperature resistant piezoelectric ultrasonic transducer is successfully developed based on a Ce-doped bismuth-layered piezoelectric ceramic (Ce-CaBi4Ti4O15, CCBT). Experimental results demonstrate that CCBT exhibits a Curie temperature of 790 ℃. Within the temperature range from room temperature to 450 ℃, its piezoelectric d33 coefficient and DC resistivity remain at 22 pC/N and 250 kΩ·m, respectively, showing excellent thermal stability. The coefficient of thermal expansion (10.45×10 -6/℃) closely matches that of common high-temperature equipment materials such as carbon steel and nickel-chromium steel, effectively preventing structural failure caused by thermal stress. By integrating CCBT transducers with a self-developed ultrasonic monitoring system and implementing high-temperature sound velocity correction, the system achieved long-term precise monitoring of 1 mm through-hole defects in P92 steel specimens at 460 ℃, with detection errors below 2% and a mean time between failures(MTBF) of 1 008 hours. The proposed monitoring technology demonstrates outstanding high-temperature stability and detection accuracy, offering a potential solution for continuous in-service non-destructive monitoring of high-temperature equipment.

Key words: bismuth layered piezoelectric ceramics, piezoelectric ultrasonic transducer, ultrasonic monitoring, high-temperature online monitoring, high-temperature ultrasonic velocity correction

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