The electric properties of the complex double perovskite Ba2BiSbO6 have been investigated using impedance spectroscopy in the frequency range from 1 Hz up to 1 MHz and in the temperature range from room temperature up to 560 K. There are two contributions to the electrical properties due to the grain and grain boundary. The oxygen vacancies play an important role in the conductivity and strongly increase the dielectric constant at high temperatures. The analysis of the frequency dependence of the conductivity clearly shows the structural phase transition of this compound near 515 K.
Castro, Manoel Carvalho Jr.; Paschoal, Carlos William de Araujo; Snyder, Frank C.; and Lufaso, Michael W., "Relaxations in Ba2BiSbO6 Double Complex Perovskite Ceramics" (2008). Chemistry Faculty Publications. Paper 8.