Preparation of Aluminum Composite Ceramic Membrane by Inorganic Precursor Sol-Gel Method

摘要

Al_2O_3-SiO_2ZrO_2 composite sol was prepared with aluminum nitrate, zirconium oxy-chloride, etc as precursors, by which Al_2O_3-SiO_2ZrO_2 composite ceramic microfiltration membrane was achieved. Stable boehmite sol can be obtained by adding Al(NO_3)_3 into ammonia but not the reverse. The stability of the composite sol depends on the ratio of Si/Zr. The aperture of the composite membrane can be micron level. It has good effect on sewage treatment.