Quantum paraelectric La1/2Na1/2TiO3 nanocrystals have successfully been pre
pared by using improved sol-gel method in which absolute alcohol and steari
c acid were used as the solvent, X-ray diffraction results show that the as
-prepared sample is a pure La1/2Na1/2TiO3 with an acubic perovskite-type st
ructure, The mean crystallite sizes were controlled by varying annealing te
mperatures. FTIR and Raman measurements reveal nano-size effects on the vib
ration spectroscopic properties of the nanocrystalline La1/2Na1/2TiO3.