Synthesis of polycrystalline Yb:Gd₃Ga₅O₁₂ nanopowders by homogeneous precipitation method

Abstract

The Ytterbium doped gadolinium gallium garnet [Yb³⁺:Gd₃Ga₅O₁₂, Yb:GGG] precursor powders were synthesized via homogeneous precipitation method using Yb₂O₃, Ga₂O₃, Gd₂O₃ and ammonium bicarbonate [NH₄HCO₃] as precipitator, and ammonium sulfate [(NH₄)₂SO₄] as additive. The evolution of phase composition and micro-structure of the powders were characterized by — TG DTA, XRD, IR, and TEM. The results indicate that all precursor powders completely transform to Yb:GGG phase by calcining at 900 °C for 8 h, the resultant powders are well dispersed and have smaller particle size approximately 80 nm owing to the electrostatic effect.

Keywords

Yb:Gd₃Ga₅O₁₂ / polycrystalline / homogeneous precipitation / nanopowders

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