Surface Overpotential:The driving force of the electrochemical reaction rate is the surface overpote ntial,ηs=η-Uw,ref,where Uw,ref is the potential of an imaginary reference ele ct-rode positioned adjacent to the w...Surface Overpotential:The driving force of the electrochemical reaction rate is the surface overpote ntial,ηs=η-Uw,ref,where Uw,ref is the potential of an imaginary reference ele ct-rode positioned adjacent to the working electrode just beyond the double lay er.Hence,展开更多
The effects of manganese dioxide (MnO 2 ) additives on the electrical characteristics of the Al-doped ZnO varistors are investigated. The leakage current densities of the samples decrease first and then increase again...The effects of manganese dioxide (MnO 2 ) additives on the electrical characteristics of the Al-doped ZnO varistors are investigated. The leakage current densities of the samples decrease first and then increase again with the increase of the amount of MnO 2 additives. Correspondingly, the nonlinear coefficients of the samples keep on increasing and then decrease. In addition, the donor densities increase monotonously with the amount of the doped MnO 2 increasing. The effects of MnO 2 additives on the electrical characteristics of the samples are different from the conclusion of previous literatures. The reasons of the distinct effects are supposed to be related with the donor and interface state densities of the samples.展开更多
文摘Surface Overpotential:The driving force of the electrochemical reaction rate is the surface overpote ntial,ηs=η-Uw,ref,where Uw,ref is the potential of an imaginary reference ele ct-rode positioned adjacent to the working electrode just beyond the double lay er.Hence,
基金supported by the National Natural Science Foundations of China (Grant No. 50737001)
文摘The effects of manganese dioxide (MnO 2 ) additives on the electrical characteristics of the Al-doped ZnO varistors are investigated. The leakage current densities of the samples decrease first and then increase again with the increase of the amount of MnO 2 additives. Correspondingly, the nonlinear coefficients of the samples keep on increasing and then decrease. In addition, the donor densities increase monotonously with the amount of the doped MnO 2 increasing. The effects of MnO 2 additives on the electrical characteristics of the samples are different from the conclusion of previous literatures. The reasons of the distinct effects are supposed to be related with the donor and interface state densities of the samples.