Influence of impurities in the tribological behaviour and thedielectrical properties of alumina

摘要

The dielectric behavior of insulators can be explained using thespace charge physics developed by G. Blaise et al. With this model,based on the concept of polarons, “defects” associated withlocal variation of polarisability are responsible for trapping charges.This paper investigates,the effects of chromium in sapphiresingle-crystal and of zirconium implantation in sintered alumina on thedielectric and tribological properties