Effect of ammonium sulfate on the monodispersed Y3Al5O12 nanopowders synthesized by co-precipitant method

Y3Al5O12 (YAG) nanopowders were synthesized by co-precipitation method with ammonium hydrogen carbonate (AHC) used as precipitator, while ammonium sulfate (AS) was adopted as steric stabilizer and electrostatic stabilizer. The crystallized pure phase of YAG is well obtained when calcined at 1000 °C for 2 h. The influence of (NH4)2SO4 as the dispersing agent in the reaction system was systematically investigated. Appropriate stoichiometric amount of sulfate has a positive effect on the average particle sizes and the powders agglomerate state. When the molar ratio of AS to nitrate is 0.625, the powder has the best dispersive properties with the smallest mean particle size of about 40 nm. Moreover, the DLVO theory is used to illuminate the underlying physical mechanism.

YAG nanopowders were synthesized by co-precipitant method with ammonium hydrogen carbonate (AHC) used as precipitator, while ammonium sulfate (AS) was adopted as dispersant. When the molar ratio of AS to nitrate is equal to 0.625, the powder has the best dispersive properties with the smallest mean particle size of about 40 nm.Figure optionsDownload as PowerPoint slideHighlights
► Ammonium sulfate as a static stabilizer enhanced the monodispersed properties.
► Well crystallized pure phase with an average particle size of ~ 40 nm.
► YAG nano particles got good properties when adding appropriate (NH4)2SO4.