煅烧温度与滴定速度对YAG粉体纯度的影响
Influence of Calcined Temperature and Titration Rate on Purity of YAG Powders
杨梨容1, 魏成富1,2, 唐 杰1, 王正云2
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作者单位：(1. 绵阳师范学院 化学系, 四川 绵阳 621000; 2. 西华大学 材料科学与工程学院, 四川 成都 610039)
中文关键字：YAG； 共沉淀； 透明陶瓷
英文关键字：yttrium aluminum garnet; co-precipitation; transparent ceramic
中文摘要：以Al(NO3)3·9H2O和Y(NO3)3·H2O为原料，NH4HCO3为沉淀剂，用共沉淀法合成Y3Al5O12，YAG前驱体粉末。用X射线衍射仪、红外光谱仪和粒度分析仪等手段对YAG前驱体粉末进行表征。结果表明，前驱体经1100 ℃煅烧2 h后完全转变为分散性较好的纯立方相YAG粉末；滴定速度过快时，在1100 ℃煅烧2 h后，前驱体粉末中含有较多中间相YAP及少量Y2O3。
英文摘要：Yttrium aluminum garnet (Y3Al5O12, YAG) powder was synthesized by co-precipitation method using Al(NO3)3·9H2O and Y(NO3)3·H2O as raw materials and NH4HCO3 as precipitator. The calcined powder was identified using X-ray diffraction, fourier transform infrared spectroscopy and laser granulometric analyzer. The results show that well dispersive and pure cubic YAG powder is obtained by calcing the precursor at 1100 ℃ for 2 h; sintering at 1100 ℃for 2 h, YAG precursor contains much more YAP and little Y2O3, if the titration rate is increased.