Low-cost high-precision ceramic membrane and preparation method thereof

Abstract

The invention discloses a low-cost high-precision ceramic membrane and a preparation method thereof, and relates to the technical field of ceramic membrane preparation, and the preparation method comprises the following steps: preparing a shrinkage cavity layer membrane coating liquid and a modification layer membrane coating liquid, uniformly coating the surface of a ceramic support with the shrinkage cavity layer membrane coating liquid, drying, sintering, uniformly coating the surface of the support with the modification layer membrane coating liquid, and preparing the low-cost high-precision ceramic membrane. And drying and sintering to obtain the high-precision ceramic membrane. According to the low-cost high-precision ceramic membrane prepared by the method, the effect of narrowing pore size distribution is realized, the high-precision ceramic membrane with zero macropore defect and most probable pore size of more than 90% distribution is prepared, and nearly 90% of phase change seed crystals select low-price angular nanoparticles as a main raw material of a shrinkage cavity layer, so that the preparation process is simple, and the cost is low. Only less than 10% of phase-change seed crystals select high-price spherical nanoparticles as raw materials of the modification layer, and the preparation process only needs two low-temperature sintering processes, so that the raw material cost and the energy consumption cost can be greatly reduced.

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