A series of undoped and doped barium titanate powders were prepared and examined by: X-ray diffraction, high-resolution scanning electron microscopy, transmission electron microscopy, particle size, zeta-potential, specific surface area, differential scanning calorimetry (DSC), impedance spectroscopy, and secondary-ion mass spectrometry. The doped samples were prepared by two different methods: (1) coating powders with chlorides and (2) mixing chlorides in a hydrothermal reactor. Different distribution profiles of the dopant atoms were observed for the two incorporation methods. Two T-C peaks were detected by DSC for samples doped by coating. Analysis of electrical measurements revealed time constant distributions that were more spread in samples that had a core-shell structure.