Determination of diffusion coefficients and grain boundary potential barrier heights of semiconducting BaTiO3 ceramics

Polycrystalline BaTiO3 ceramics were synthesized from Mn-coated semiconducting BaTiO3 powders by hot-press sintering. The diffusion coefficients of the Mn, Ba, Ti ions near the grain boundary were estimated from the chemical distribution near the grain boundary of the ceramics; the chemical distribution was obtained by analytical transmission electron microscopy. The grain boundary potential barrier height was also estimated from the chemical distribution.