THERMAL BEHAVIOR OF Al SUBSTITUTED LiTi2(PO4)3 NASICON COMPOUNDS

Abstract

The compounds lithium aluminum titanium phosphates Li_1+xTi_2-xAl_x(PO₄)₃(LATP) with various compositions 0 <x< 1have been synthesized using solid-state method. The as prepared sample has been characterized using various techniques. From TGA result, it has been observed that as x-content increases into the reaction mixture the integral temperature of decomposition decreases. Similarly, the temperature at which the materials become stable also decreases this indicated that phase stability is affected by increasing x content into basic compound. For structural analysis; the samples were successfully synthesized with R-3c space group assuming a hexagonal crystal axis with ICSD database 98-006-9677. The finding showed that single phase is only observed with lower x-value substitution. As Al content increases the number of secondary phases were observed to increase with various aluminum phosphate(AlPO₄).