Rapid Synthesis and FT2Raman Spectroscopic Study of Lanthanum Modified Lead Titanate Nanocrystals

Pb1 - xLa x Ti 1 - xP 4O3 nanocrystals with different amounts of lanthanum were prepared by modified sol2gel method and detected by FT2Raman spectra at 288 and 378 K , respectively. The improved synthetic technique used in this paper could obtain nanocrystals with apparently promoted synthetic speed from a few days to several hours ( 4 times faster of hydrolytic process than that of traditional sol2gel method and reduced preparation period of gel from 24 h to several hours) at relatively lower temperature by hydrolysis of sol to gel through adding methyl alcoholP water solution into sol under vigor2 ous stirring and annealed the fresh gel directly. The effects of lanthanums amount , annealed temperature and nanocrys2 talsgrain size of Pb0. 9La0. 1Ti 0. 975O3 nanocrystals on frequency , shape and width of the phonon peak were also discussed in detail .