Title :
Influence of Cr2O3 and MnO additives on the surface properties of alumina insulators
Author :
Lei, Y.J. ; Xiao, D.Q.
Author_Institution :
Dept. of Mater. Sci., Sichuan Univ., Chengdu, China
Abstract :
Alumina insulators containing 95wt% Al2O3 were doped with Cr2O3 and MnO(MnCO3). The properties of the doped samples were measured and compared with those of the original alumina insulators. Better surface performances of the samples doped with proper Cr2O3 and MnO were obtained while the bulk properties have hardly been changed. After doping the sample showed a lower SEE (secondary electron emission) coefficient, a lower surface resistivity and a higher surface flashover voltage in vacuum. Meanwhile, some points regarding the effects of manganese and chromium doping on the properties of alumina insulators were also briefly discussed.
Keywords :
alumina; ceramic insulators; doping; flashover; secondary electron emission; vacuum breakdown; Cr2O3:Al2O3; MnO:Al2O3; SEE; additives; alumina ceramic; alumina insulator; chromium doping; doping; manganese doping; secondary electron emission; surface flashover voltage; surface resistivity; vacuum breakdown; Additives; Ceramics; Chromium; Doping; Flashover; Insulation; Surface resistance; Surface treatment; Vacuum breakdown; Voltage;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2006.1593406
