强脉冲γ线辐射对压电陶瓷材料性能的影响

加速度压电传感器是反应堆内常用的振动测量器件，其核心部件是压电陶瓷材料。由于在强核辐射环境下，中子和γ线分别于压电陶瓷内的原子核和核外电子发生相互作用，发生微观损伤，此损伤经由分子尺度、介观尺度直至会表现为宏观性能（包括材料的压电性能及表观形貌信息等）的变化，将影响器件的性能。长时间、高剂量率γ线辐照对压电陶瓷材料性能变化已有研究，然而短时间、高剂量率γ线辐照对压电陶瓷材料性能变化的研究较少。该文在辐射装置上进行压电陶瓷材料的高剂量率γ线辐照，随后对材料辐照前、后的压电性能、表观形貌等信息进行实验测试，通过测试结果分析了高剂量率γ线辐照对压电陶瓷材料性能的影响。

Effect of Intense Pulsed Gamma Radiationon Properties of Piezoelectric Ceramics

The acceleration piezoelectric sensor is a commonly used vibration measurement device in reactor, and its key component is piezoelectric ceramic material. In the environment of intense nuclear radiation, the neutrons and gamma rays interact with the nuclei and electrons in the piezoelectric ceramics respectively, resulting in microscopic damage. Such damage will change the molecular scale and mesoscopic scale, even macroscopic performance, including piezoelectric properties and apparent morphology information of materials, which will bring hidden trouble to the service performance of devices. The effects of long time and high dose gamma ray irradiation on the properties of piezoelectric ceramics have been studied, but the effects of short time and high dose gamma irradiation on the properties of piezoelectric ceramics has little study. In this paper, the piezoelectric ceramic materials were irradiated with high dose rate gamma on the radiation device, and then the piezoelectric properties and apparent morphology of the materials before and after irradiation were tested. The influence of high dose rate irradiation on the properties of piezoelectric ceramics was analyzed through the test results.