The effect of precipitate agent in co-precipitation synthesis Y3Al5O12 and Y3Fe5O12 powders

The YAG and YIG powders have been prepared by co-precipitation technique in which NH4HCO3 or (NH4)(2)CO3 is used as a precipitant and Y(NO3)(3)center dot 6H(2)O, Al(NO3)(3)center dot 9H(2)O and Fe(NO3)(3)center dot 9H(2)O as raw materials. The composition, the phase formation process and the properties of the YAG and YIG powders were investigated by means of XRD, SEM, TEM and EDS. The results indicated that the precipitant effects the preparation of pure-phase powders. The resultant YAG and YIG powders showed good dispersity and excellent sinterability using AHC as precipitant.