A new combustion process for nanosized YBa2ZrO5.5 powders

A new single step process for the synthesis of nanoparticles of YBa2ZrO5.5, a complex perovskite ceramic oxide. is reported for the first time. Tn the present modified combustion method no calcination step was needed to obtai n phase pure powder of YBa2ZrO5.5. The YBa2ZrO5.5 powder, obtained by self sustained combustion of a precursor complex of the respective metal ions, i s characterised by High Resolution Transmission Electron Microscopy, Powder X-ray Diffraction, Differential Thermal Analysis, Thermo-gravimetric Analy sis, FT-IR Spectroscopy, BET surface area Analysis and Agglomerate size ana lysis. The particle size of the as prepared YBa2ZrO5.5 was in the range 5 n m to 50 nm. The lattice image of the nanocrystalline particle showed very l ittle distortion and the intercrystalline boundary was quite sharp without any second phase. (C)1999 Acta Metallurgica icn Inc.