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Lithium mixed sodium tntltanates with 0.3, 0.5 and 1.0 M percentage of Li z C0 3 (general formula Naz-xLixTi 3 0 7 ) have prepared by a high temperature solid-state reaction route. EPR analysis, high temperature range (473-773 K) and variable frequency range (100 Hz-1 MHz) ac conductivity measurements were carried out on prepared sample. The lithium ions are accommodated with the sodium ions in the interlayer space. The EPR specta of lithium mixed sodium Trititanates confirm the partial reduction of Ti 4 + ions to Ti 3 +. Four distinct regions have identified in the LnaT versus 1,0001T plots. Various conduction mechanisms which dependence on concentration, frequency and temperature are reported in this paper for lithium mixed layered sodium Trititanates. The dilation of interlayer space has further been proposed to occur due to inclusion of lithium ions in the interlayer space. The conductivity increases as the concentration of lithium increases. The increase of ionic conductivity in these compounds is due to accommodation of lithium ions with sodium ions in interlayer space.

Sodium (50%) mixed layered Li 2 Ti 3 O 7 and its 0.01, 0.05 & 1.0 molar percentage CuO doped derivatives have been prepared through high temperature solid state reaction and characterized through X-ray diffractometer, d.c. conductivity in the temperature range 373-700K and room temperature EPR investigation. Room temperature X-ray diffratograms confirm the phase evolution. Room temperature electron paramagnetic resonance (EPR) data show that Cu 2+ occupies Ti 4+ lattice sites giving rise to electric dipoles which increases electric permittivity. The absorption peak in EPR spectra gets broadened due to increased exchange interaction in heavily doped derivatives. Four distinct regions have been identified in the Ln(σT) versus 1000/T plots. Various electrical conduction mechanisms have involved during the whole temperature range of study

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