高岭土微球原位合成纳米Y沸石

喷雾干燥成型的苏州高岭土经不同温度焙烧活化后在水热条件下原位晶化为纳米尺度的NaY沸石微球。采用X射线荧光光谱（XRF）分析合成前后微球的化学组成；采用X射线衍射光谱（XRD）表征微球的晶相组成；采用扫描电子显微镜（SEM）表征合成前后微球的形貌。考察了合成过程中投料硅铝物质的量比、晶种导向剂用量、碱量、体系水加入量和高岭土焙烧温度等条件对原位晶化合成的影响，并讨论了合成过程出现的问题，制备了纯相且生长完好的纳米尺度的Y沸石微球。

In-situ synthesis of nano-sized NaY zeolite on kaoline microsphere

Nano-sized NaY zeolite was synthesized in-situ hydrothermally with a mixture of amorphous microspheres made by spray drying of Suzhou kaolin clay calcined at different temperature levels.The chemical composition of the microspheres before and after synthesis was determined by X-ray fluorescence analysis（XRF），the crystal structure of the microsphereswas characterized by X-ray diffraction spectrum（XRD），and their morphologies were characterized by scanning electronmicroscopy（SEM）.The influences of the factors，such as amount-of-substance ratio of silica to alumina，dosage of seedingdirector，alklinity，water consumption，and calcination temperature of kaoline on in-situ crystallization synthesis were investigated，and some problems occurred in the synthesis process were also discussed.Pure nano-sized zeolite NaY microspheres were synthesized.