Preparation of YAG Nanopowder and Transparent Ceramics with Chloride Salt Co-precipitation Method
Using commercial aluminum chloride and yttrium chloride as raw materials,YAG nanopowder was synthesized by using the co-precipitation method.YAG transparent ceramics were prepared through high-temperature vacuum sintering from the nanopowder.Thermogravimetry-differential thermal analysis(TG-DTA),Fourier transform infrared(FT-IR),X-ray diffraction(XRD)and other methods were used to study the effects and rules of chlorine salt concentration and dispersant PEG-6000 concentration on phase formation,particle size,and crystal grain size.With mixed solution of 0.25 mol·L-1 AlCl3·6H2O and 0.15 mol·L-1 YCl3·6H2O as the reactant,1.0 mol·L-1 NH4HCO3 as the precipitant,and 20 g·L-1 PEG-6000 as the dispersant,the YAG powder obtained by calcining the precursor at 1100 ℃ for 6 h using the reverse titration coprecipitation method has optimal performance,with an average particle size of 66 nm.The resultant YAG ceramics had linear transmittances of 45.0％@400 nm and 52.8％@1100 nm(1 mm thickness),which need to be further optimized
transparent ceramicsyttrium aluminum garnetco-precipitation methodchloride salt
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