Papers by Keyword: Precursor Powder

Abstract: The YAG and YIG powders have been prepared by co-precipitation technique in which NH₄HCO₃ or (NH₄)₂CO₃ is used as a precipitant and Y(NO₃)₃·6H₂O, Al (NO₃)₃·9H₂O and Fe (NO₃)₃·9H₂O 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.

Abstract: The Y₃Al_5-xFe_xO₁₂ (0x5, YAIG) powders have been prepared by co-precipitation technique in which NH₄HCO₃ or (NH₄)₂CO₃ is used as a precipitant and Y(NO₃)₃·6H₂O, Al (NO₃)₃·9H₂O and Fe (NO₃)₃·9H₂O as raw materials. The composition of YAIG precursor, the phase formation process of YAIG and the properties of the powders were investigated by means of XRD, SEM, TEM and EDS. The results indicated that the precipitant effects the preparation of pure-phase YAIG powders. AC as precipitant could produce a hydroxide precursor, which transformed to a mixture. AHC as precipitant could produce a loosely agglomerated carbonate precursor. The resultant YAIG powders showed good dispersity and excellent sinterability.