The effects of dopant addition on sintering, electrical conductivity,fracture strength,and corrosion resistance of polycrystalline CaTiO 3

The effects of dopant addition on sintering, electrical conductivity, fracture strength, and corrosion resistance of polycrystalline calcium titanate have been investigated for a wide list of potential substitutional dopants. Significant improvements of electrical conductivity at room temperature and corrosion resistance in molten KOH at 450° C have been observed in the polycrystalline calcium titanate specimens doped with tantalum and niobium and cerium and chromium, respectively. These results are in comparison to pure, reduced material. On the other hand, no appreciable effect of dopant addition has been observed on sinterability and fracture strength of the polycrystalline calcium titanate.