The results show that the diameter of nanometer SiO_2 made by sodium silicate and acetic ether lies in 20-40nm,and the BET specific area reaches 400m~2/g,and the most reaches to 503.38m~2/g.

• 研究表明；以硅酸钠为原料；乙酸乙酯为潜伏酸试剂；用溶胶-凝胶法可制得粒径为20~40 nm级的S iO2粉末；粉末的BET比表面积可达400m2/g；最高可达503.；38m2/g。