Many dielectrics exhibit a (polarization) relaxation response when a time-varying electric field is applied. In some frequency bands, the amplitude of the polarization changes rapidly, with a significant dielectric loss; the maxima in the change rate are referred to as relaxation peaks. ZnO varistors exhibit a dielectric response with several relaxation peaks, but the relationship between the relaxation peaks and electrical properties has not been established. To understand this relationship, dielectric spectroscopy measurements of ZnO varistors were conducted in the temperature range of −110 C to 200 C in the frequency range of 10⁻¹–10⁶Hz. By changing two important dopants of Bi₂O₃ and Sb₂O₃, four relaxation peaks, named Peak A, Peak B, Peak C, and Peak D, were detected. It was found that peaks A, B, and D are indispensable for higher nonlinearity and lower leakage current density. The detection of all four peaks implies that ZnO varistors possess excellent electrical properties, that is, a high breakdown field (235.2Vmm⁻¹), nonlinear coefficient (76.2), and low leakage current density (0.065μAcm⁻²).

当施加时变电场时，许多电介质会表现出（极化）弛豫响应。在某些频带中，极化幅度会迅速变化，介电损耗会很大。变化率的最大值称为松弛峰。ZnO压敏电阻表现出具有几个弛豫峰的介电响应，但尚未确定弛豫峰与电性能之间的关系。为了理解这种关系，在−110 C至200 C的温度范围内，10 ^-1 –10 ⁶ Hz的频率范围内对ZnO压敏电阻进行了介电谱测量。通过改变Bi ₂ O ₃和Sb ₂ O _3的两种重要掺杂剂四个松弛峰，命名为峰A，B峰，峰C，和峰d，进行检测。发现峰值A，B和D对于更高的非线性和更低的漏电流密度是必不可少的。所有四个峰的检测意味着氧化锌压敏电阻具有优异的电性能，即，高击穿场（235.2Vmm ^-1），非线性系数（76.2），和低泄漏电流密度（0.065 μ了Acm ^-2）。