Effect of dopants in single crystal alumina on trapping properties and secondary electron yield

The effect of doping elements in alumina should be a function of the different characteristics of the elements such as size, charge and electronegativity. These parameters could influence the properties of diffusion, of charge trapping, of mechanical toughness... . In this paper we have tried to relate the diffusion behaviour of three impurities: chromium, silver and copper, to the electrical and mechanical properties of doped alumina.