Abstract
Ionic conductivity of La 4/3 − y Li 3yTi 2O 6 (LLTO), where y value is 0.21, dispersed by various amount of strontium titanate (SrTiO 3) was measured by complex impedance method, and powder X-ray diffraction (XRD) measurements and scanning electron microscope (SEM) observations were carried out. With increasing SrTiO 3 concentration, the conductivity decreased. At 34 mol%, the Bragg peaks at 11, 26 and 35° in LLTO disappeared in XRD patterns and small non-angulated crystals were shown in SEM. The behavior of ionic conductivity was discussed by using the effective medium approximation (EMA) theory.
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