Sol-gel Synthesis and Characterisation of Nanocrystalline Yttrium Aluminum Garnet Nanopowder

摘要

The synthesis of yttrium aluminum garnet (YAG) (Y_3 Al_3O_(12)) nanopowder was carried out by sol-gel method. Y(NO_3)_36H_2O, Al(NO_3)_39H_2O in the presence of citric acid as complexing agent were used as starting materials. YAG nanopowder was characterised by FTIR, TGA, and XRD. To get phase-pure nanocrystalline YAG powder at relatively lower temperature, calcination at various temperatures was studied and calcination temperature was optimised. Particle size, estimated by XRD using Scherrer's equation, was found to be 28-35 nm which was further confirmed by transmission electron microscopy. The particle morphology was studied by SEM.