Grain Boundary Characteristics of 0.01 mol%V₂O₅-Doped ZnO-Bi₂O₃-Based Varistor Ceramics

Abstract:

The effect of 0.01 mol%V₂O₅ on the grain boundary characteristics of ZnO-Bi₂O₃-based varistor ceramics is investigated in this work. The average grain size of ZnO was 13.3 µm. The ZnO-Bi₂O₃ system added with V₂O₅ content of 0.01 mol% exhibited not only a high nonlinearity, in which the nonlinear coefficient is 25 and the leakage current density is 0.02 µA/mm² and the voltage gradient of 31.1 V/mm, but also a good grain boundary characteristics, in which barrier height fB = 0.908 eV, depletion layer width w = 32.49 nm, donor density Nd = 0.810×1018 cm-3, and density of interface states N_s = 2.632×1012 cm-2.

• Periodical: Advanced Materials Research (Volume 320)
• Pages: 240-243
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.320.240
• Online since: August 2011
• Authors: Jin Hua Ju, Hua Wang, Ji Wen Xu
• Keywords: Property Analysis, V₂O₅-Doping, Varistor Ceramics, ZnO-Bi₂O₃

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