The objective desired is the elaboration of varistors based on zinc oxide-doped by the addition of SrCO₃ with a different quantity of 1, 2, 3 and 4 mol% SrCO₃, such that the base quantity is 0.5 mol% of Bi₂O₃, 0.5 mol% of Sb₂O₃ and 99 mol% of ZnO. The varistors were sintered at the temperature 1000–1200 °C in a solid way, the microstructural characteristics are carried out by X-ray diffraction (XRD) and scanning electron microscopy (SEM) where we could determine several secondary phases such as Zn_2.33Sb_0.67O₄, Bi₃Sb₃Zn₂O₁₄, Bi₆Sr₂O₁₁, Bi₂O₃ and Sb₂O₃ have been formed. These latter were the result of a competition between diffusion and segregation of oxides into the grain core and the grain boundaries of matrix. High SrCO₃ content was originally the segregation of the Bi₂O₃, Sb₂O₃ oxides and of solid solution (Bi₆Sr₂O₁₁) in the grain boundaries. Grain size, relative density, electrical permittivity (\({\upvarepsilon }^{\mathrm{^{\prime}}}\)), loss factor (tanδ) and leakage current (I_L) are reduced when increasing the amount of SrCO₃, on the other hand, the non-linearity coefficient (α) and electric voltage (V_b) increased, the sample with the highest amount of SrCO₃ presents a better coefficient of non-linearity 29.37 and 1020 V in comparison with others varistors. In all of these results it can be said that the addition of SrCO₃ was given an improvement on the electrical property, dielectric and microstructure of the base varistor. The obtained varistor would be very promising in low-voltage power transmission systems.

期望的目标是通过添加具有不同量的 1、2、3 和 4 mol% SrCO _{3的 SrCO 3}来制备基于氧化锌掺杂的变阻器，使得基本量为 0.5 mol% Bi ₂ O _3、0.5mol％的Sb ₂ O ₃和99mol％的ZnO。压敏电阻在 1000–1200 °C 的温度下以固体方式烧结，微观结构特征通过 X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 进行，我们可以确定几个第二相，如 Zn _2.33 Sb _0.67 O ₄ , Bi ₃ Sb ₃ Zn ₂ O_{如图14所示}，形成了Bi ₆ Sr ₂ O ₁₁、Bi ₂ O ₃、Sb ₂ O _{3 。}后者是氧化物扩散和偏析到晶核和基体晶界之间竞争的结果。高SrCO _{3含量最初是Bi 2} O ₃、Sb ₂ O ₃氧化物和固溶体(Bi ₆ Sr ₂ O ₁₁ )在晶界中的偏析。晶粒尺寸、相对密度、介电常数 ( \({\upvarepsilon }^{\mathrm{^{\prime}}}\))、损耗因数(tan δ )和漏电流( I _{L )随着SrCO 3}含量的增加而降低,另一方面,非线性系数( α )和电压( V _b )增加,样品与与其他变阻器相比，SrCO ₃的最高含量呈现出更好的非线性系数 29.37 和 1020 V。在所有这些结果中，可以说添加 SrCO ₃改善了基础变阻器的电性能、介电和微观结构。获得的变阻器在低压电力传输系统中非常有前途。