EFFECT OF DISPERSION OF CEO2 IN THE IONIC-CONDUCTIVITY OF LI2MNCL4

A few different compositions of Li2MnCl4-CeO2 composites have been pre pared by slow cooling of the melt down to room temperature and charact erised for their structure (X-ray diffraction), thermal (DTA) and elec trical (ionic conductivity) transport properties. The X-ray diffractog rams show evidence for two phase mixtures and confirm the formation of heterogeneous mixing of the two matrices (Li2MnCl4 and CeO2). The ion ic conductivity results obtained by means of ac-impedance technique ar e discussed in the light of the space-charge model. DTA measurements h ave been made to examine the effect of CeO2 addition in the phase tran sition properties of the host Li2MnCl4 structure.