以硅藻土为主要原料,添加烧结助剂、粘结剂等,控制合适配比,采用物理成型、低温焙烧工艺,制备球形硅藻土材料。结合高分辨扫描电镜、X射线衍射仪等手段对材料进行表征,结果表明：在材料的制备过程中,并未发生晶相转变；材料的比表面积随着焙烧温度的升高先增大后减小,在400℃温度下焙烧120 min制备的球形硅藻土具有较理想的孔结构,比表面积达到54.753 m2/g,总孔容0.1426 cm3/g,孔径主要集中在3 nm左右。
Taking diatomite as the main material, adjoining sintering additive and binder, spherical diatomite material was obtained by using physical forming and low-temperature roasting. The material was characterized by scanning electron microscope, X-ray diffraction. The results indicate that in the process of materials preparation, the crystal transition had not occurred. The specific surface area of materials increases at first then decreases with the increase of calcination temperature. The excellent pore structure of spherical diatomite materials was gained when calcination temperature at 400℃ for 120 min. The high specific surface area, total pore volume and narrow pore-size distribution were 54. 753 m2/g, 0. 1426 cm3/g and 3 nm, respectively.
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