High-Voltage ZnO-Based Ceramics with a Leakage Current Density below 1 μA/cm2

详细

This paper presents a study aimed at determining the weight ratio of oxide additives for obtaining high-voltage ceramics in the ZnO–Bi₂O₃–Sb₂O₃–Al₂O₃–Co₃O₄ system containing 90 wt % ZnO, with a leakage current density under 1 μA/cm². The ceramic containing the oxide additives in the ratio Bi₂O₃ : Sb₂O₃ : Al₂O₃ : Co₃O₄ = 0.25 : 0.17 : 1.4 : 1.4 has a nonlinearity coefficient as high as α = 69, a leakage current density as low as I_l = 0.4 μA/cm², and a breakdown voltage V_b = 4.1 kV/mm.