The invention relates to a preparation method of a dynamic
cross flow filtration disc type full
silicon carbide filtering membrane, and belongs to the technical field of preparation of advanced ceramics. The preparation method comprises the following steps: weighing a coarse
silicon carbide powder I, a fine
silicon carbide powder II, a
plasticizer and a pore forming material, stirring and dissolving the
plasticizer into
warm water, sequentially adding the coarse
silicon carbide powder I, the fine
silicon carbide powder II and the pore forming material, and mixing evenly; conducting compressionmoulding after
drying and screening to obtain a biscuit; using the fine
silicon carbide powder II and a binder to prepare a concentrated
slurry, spraying the concentrated
slurry on the outer edge ofthe biscuit, and adhering two biscuits together;
sintering to obtain a support body for the disc type full silicon carbide filtering membrane; weighing a fine silicon carbide powder III, a dispersingagent and the binder, adding deionized water, and
grinding to obtain a membrane
coating solution; spraying the membrane
coating solution on the outer surface of the support body, and
drying to obtaina semi-finished product of the filtering membrane; and
sintering the semi-finished product of the filtering membrane to obtain a finished product of the disc type full silicon carbide filtering membrane. The prepared silicon carbide
ceramic membrane has the characteristics of high filtering precision and large separating flux.