Micro computed tomography (Micro-CT) was applied to obtain three-dimensional images of the microstructure of cement paste (water-to-cement mass ratio of 0.5) at
ZnO Bi2O3-based varistor ceramics doped with Eu2O3in a range from 0 to 0.4%were obtained by high-energy ball milling and fired at 900 1 000°C for 2 h.XRD a