Frigură-Iliasa, Mihaela; Tămaş, Andra Dana
(Timişoara : Editura Politehnica, 2004)
ZnO based varistors are today used for making state of the art surge arresters for all voltage levels. Essentially they are “n” semi-conductor ceramics made of ZnO (more than 90% molar percents) and many other oxides having ...