Preparation method of composite ceramic, and composite ceramic

[0013] The first aspect of the present invention provides a method for preparing composite ceramics, including:

[0014] Co-extruding at least two ceramic raw materials to prepare a composite ceramic green sheet, the composite ceramic green sheet including a multilayer ceramic green sheet;

[0015] The composite ceramic green sheet is subjected to degreasing and sintering treatments to prepare a composite ceramic, and the composite ceramic includes a multilayer ceramic sheet.

[0016] The composite ceramic prepared by the co-extrusion molding process has a stable structure, high molding accuracy, uniform density, few defects such as cracks and pores, and the strength and toughness of the composite ceramic are improved. The preparation method has fewer production procedures, low cost, and production There are no three wastes produced in the process, no flammable and explosive organic solvents, environmental protection and high safety.

[0017] Preferably, the ceramic raw material includes

[0041] Example 1

[0042] Preparation of the first ceramic raw material: 85% by weight of zirconia ceramic powder (specific surface area of ​​10m 2 / g), 10% by weight of high-density polyethylene, 5% by weight of polyethylene wax, 0.85% by weight of stearic acid and 1% by weight of plasticizer are mixed in an internal mixer to a uniform paste. The mixed material is put into the granulator and cut into the first ceramic raw material with uniform particles;

[0043] Preparation of the second ceramic raw material: 83% by weight of zirconia ceramic powder (specific surface area of ​​10m 2 / g), 10% by weight of high-density polyethylene, 5% by weight of polyethylene wax, 0.85% by weight of stearic acid, 1% by weight of plasticizer and 2% by weight of zirconia inorganic fiber in the internal mixer Mix to a uniform paste, put the mixed material into the granulator and cut into a second ceramic raw material with uniform particles;

[0044] Co-extrusion composite ceramic green sheet: the fi

[0046] Example 2

[0047] Compared with Example 1, the difference is that a composite ceramic with a five-layer structure of first ceramic sheet / second ceramic sheet / first ceramic sheet / second ceramic sheet / first ceramic sheet is co-extruded.