Preparation method of layered ceramic curved plate

Abstract

The invention discloses a preparation method of a layered ceramic curved plate, and the method comprises the following specific steps: 1) preparing a ceramic green sheet with the thickness of 0.1-5 mm; 2) cutting each layer of ceramic green body sheet according to the plane expansion diagram of the prepared layered ceramic curved plate, wherein the cut ceramic green body sheets ensure that a gap is formed between the edge and the inner wall of the mold during mold filling; 3) laminating the cut ceramic green sheets, cutting a V-shaped opening in an area where material wrinkles are easy to overlap during mould pressing, putting the ceramic green sheets into a steel mould, carrying out compression molding at 30-380 DEG C under the pressure of 50-500 kgf / cm<2>, and carrying out heat preservation for 0.5-5 h. According to the method, the fluidity of the binder in a heating state is improved, drape overlapping is reduced by cutting the V-shaped opening, flowing of powder is promoted throughheating and pressing forming, the normal equal height of the green body is converted into the vertical equal height, and a cut notch is healed.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a method for preparing a layered ceramic curved panel. Background technique [0002] Ceramic materials have the characteristics of high strength, high hardness and low density, and are widely used in national defense, chemical industry, machinery and other fields. However, as a brittle material, ceramics are brittle and have poor toughness, and are prone to catastrophic fracture under the action of high-speed impact and alternating stress. Layered composite ceramics use alternate lamination of different materials to increase the energy required for crack propagation, which can greatly increase material toughness and fracture work, reduce defect sensitivity, and improve the brittleness of ceramics. The preparation of layered composite ceramic materials can be divided into two types: integral molding method and prefabricated sheet lamination method. The one-p...

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Problems solved by technology

[0003] Aiming at the problem of difficult molding of layered ceramic curved panels, the invention utilizes the improvement of the fluidity of the binder in the heated state, reduces the overlap of wrinkles by cutting the "V"-shaped opening, and promotes the flow of the powder by heating and pressing to make the green body Convert from normal to vertical contour and heal clipped cuts

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