Microwave Assisted Synthesis of Yb:Y₂O₃ Based Materials for Laser Source Application

Abstract Yb:Y₂O₃ submicrometric particles were synthesized through co‐precipitation of Yb and Y nitrate in water. Microwave heating and controlled release of ammonia through urea decomposition at reaction temperature leaded to the formation of disaggregated, monosized spherical particles of carbo‐hydroxy‐nitrate precursors. Pure crystalline Yb:Y₂O₃ powder that preserved the described morphology was obtained after calcination in air at 800 °C for 30 min. This powder mixed with commercial alumina powder was used to produce transparent Yb:YAG ceramics. Improved properties in terms of powder morphology and reactivity were presented in comparison with powders obtained by traditional heating.