Low temperature synthesis and characterization of YAG nanopowders by polyacrylamide gel method

摘要

Yttrium aluminum garnet (YAG, Y3Al5O12)nanopowders were synthesized by a polyacrylamide gel method at a much lower temperature of 900 degrees C than using the traditional methods. This synthesis process was thoroughly investigated including an examination of the phase transformation, the particle size and agglomeration degree at different molar ratios of monomer to the precursor salt and the calcination temperature. A high mole ratio of monomer to the precursor salt led to low formation temperature of YAG, resulting from the high homogeneity and reduced particle size of the precursor. Consequently, weak-agglomerated YAG nanopowder with an average particle size of 35 nm can be prepared at a calcination temperature of 900 degrees C for 2 h. The as-prepared YAG nanopowder showed excellent sinter-ability. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.