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研究了铁电─驻极体复合材料的受辐射效应，发现吸收一定累积剂量的γ辐射后，复合材料的体电阻ρ、介电常数ε、纯热释电系数ｐ、压电常数ｄ３３的数值和热电驰豫、极化驰豫特性都将发生变化。一种复合材料存在两个累积辐射剂量数值界限：ｒ０和Ｒ０。当累积辐射剂量小于并接近ｒ０，复合材料的ρ、ε、ｐ和ｄ３３的衰减趋势与自然老化基本相同；当累积辐射剂量大于Ｒ０，复合材料将永久损伤。本文从理论上分析了γ辐射的电离作用导致复合材料内部局域态分布的改变是产生上述辐射效应的主要原因。
The radiation effects of ferroelectric-electret composites were studied. It was found that the volume resistivity ρ, the dielectric constant ε, the pure pyroelectric coefficient p, and the piezoelectric constant d33 after absorbing a certain cumulative dose of γ-radiation And thermoelectric relaxation, polarization relaxation characteristics will change. There are two numerical limits of cumulative radiation dose for a composite: r0 and R0. When the cumulative radiation dose is less than and close to r0, the decay tendency of the composites ρ, ε, p and d33 are basically the same as natural aging; when the cumulative radiation dose is greater than R0, the composites will be permanently damaged. In this paper, the main reason for the above radiation effects is the theoretical analysis of the ionization of γ-radiation resulting in the change of the local state distribution in the composite material.