Electrical properties and defect structure of polycrystalline doped barium titanium niobate

The authors present the preliminary results of a study of the defect chemistry of barium titanium niobate (BTN) and Ba/sub 6-1.5x/La/sub x/Ti/sub 2/Nb/sub 8/O/sub 30/ (BLTN). A preliminary model for the defect chemistry of BLTN is presented, and the trends in conductivity with composition, temperature, and p/sub 02/ are shown, for sintered compacts of BLTN with lanthanum content from 0% to 20%. The major lattice defects in these compositions are tentatively identified, and an estimate of the thermal bandgap is derived.<
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