TY - JOUR T1 - The influence of grain boundary impedances on the p-type conductivity of undoped BaTiO3 ceramics JO - J EUR CERAM SOC PY - 2002/04/01 AU - Clark IJ AU - Marques FB AU - Sinclair DC ED - VL - 22 IS - 4 SP - 579 EP - 583 Y2 - 2024/12/22 ER -