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Fixed frequency permittivity data at 100 kHz. Inset shows vs composition with data from Ref. 3 (open symbols) for comparison. At 100 kHz the permittivity data represent the bulk capacitance, .
Conductivity Arrhenius plots for (open symbols) and (filled symbols) measured without a dc bias (circles) and with an applied voltage of 10 V (squares) after a steady state conductivity had been reached; sample thickness 1.44 mm, BCT1; 1.52 mm, BCT3; 1.19 mm, BTC1; and 0.98 mm, BTC3; activation energies in electron volt.
Bulk conductivity at for BTC1 after applying and removing a dc bias of 10 V (sample thickness 1.19 mm) at different times in , air, and .
Lattice parameters, pellet densities, , , and .
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