Abstract
The microstructure, electrical properties, and DC accelerated aging characteristics of varistors, which are composed of ZnO–Pr 6O 11–CoO–Cr 2O 3–Dy 2O 3 ceramics, were investigated at various CoO contents. The varistor ceramics was more densified as increasing density in the range of 5.25–5.55 g cm −3 with increasing CoO contents. The varistor with CoO of 1.0 mol% exhibited the highest nonlinearity, with 66.6 in nonlinear exponent and 1.2 μA in leakage current, and also the highest stability in the light of nonlinear properties and dielectric characteristics. Furthermore, the varistor with CoO of 1.0 mol% exhibited superior DC accelerated aging characteristics to other varistors in nonlinear properties and dielectric characteristics. Finally, it is assumed that the CoO is moderate contents in the range of 1.0–2.0 for this composition.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.