Multi-layer co-fired aluminum oxide ceramic plate support body as well as preparation method and application thereof

The invention relates to the technical field of porous ceramic material preparation, in particular to a multi-layer co-fired alumina ceramic plate support and a preparation method thereof. According to the method, the bottom layer, the transition layer and the top layer of the ceramic membrane supporting body are sequentially pressed under the gradient pressure condition through the compression molding technology, finally the needed supporting body can be obtained through drying and one-time co-firing, the process is simple, and operation is easy. The porosity and the pore size of different layers are effectively adjusted by controlling the material composition of the membrane layer and adjusting the gradient change of the particle size of each layer of aggregate, the pore size of the prepared ceramic flat plate support body is gradually increased from the top layer to the bottom layer, the filtering resistance can be reduced, and the filtering flux can be increased. According to the prepared flat ceramic mem