Author/Authors :
Li، نويسنده , , Jiang and Chen، نويسنده , , Feng and Liu، نويسنده , , Wenbin and Zhang، نويسنده , , Wenxin and Wang، نويسنده , , Liang and Ba، نويسنده , , Xuewei and Zhu، نويسنده , , Yingjie and Pan، نويسنده , , Yubai and Guo، نويسنده , , Jingkun، نويسنده ,
Abstract :
Yttrium aluminum garnet (YAG) precursor was synthesized via a coprecipitation method with aluminum nitrate and yttrium nitrate as raw materials, using ammonium hydrogen carbonate (AHC) as the precipitant. Fine and low-agglomerated YAG powder was obtained by calcining the precursor at 1200 °C. The primary crystallites were measured to be ∼120 nm in size and weakly agglomerated to a particle size of ∼500 nm, indicating a high degree of sinterability. With 0.5 wt% tetraethyl orthosilicate (TEOS) and 0.1 wt% magnesia as sintering aids, transparent YAG ceramics were fabricated by vacuum sintering at 1730–1790 °C for various hours. The influences of sintering temperature and holding time on the microstructure and transmittance of YAG ceramics were discussed.
Keywords :
Vacuum sintering , transparent ceramics , Co-precipitation synthesis , YAG powders
