A kind of preparation method of layered ceramic curved panel
A curved surface and ceramic technology, applied in the field of preparation of layered ceramic curved plates, can solve problems such as the difficulty of forming the layered ceramic curved plates, and achieve the purpose of promoting the fit of the cast sheet to the mold surface, reducing internal stress, and facilitating mass production. Effect
Active Publication Date: 2022-06-07
NINGBO VULCAN TECH CO LTD
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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
Method used
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Embodiment
[0022] Follow the steps below to prepare dense silicon carbide curved panels:
[0023] 1) The ceramic raw material powder is selected from silicon carbide powder, silicon nitride powder and graphite powder, and mixed in a ratio of 94:4:2. Take 100 parts of the mixed powder, 20 parts of polyvinyl butyral as the binder, and 20 parts of plastic The softening agent is 6 parts of epoxidized soybean oil, the dispersant is 3 parts of herring oil, and the solvent is 120 parts of anhydrous ethanol and 80 parts of trichloroethylene. The above components are mixed and ball-milled to obtain ceramic slurry;
[0024] 2) The ceramic green sheet is prepared from the ceramic slurry by the tape casting process, and the thickness of the casting layer is 0.1 mm;
[0025] 3) Cut each layer of ceramic green sheets according to the plane development diagram of the prepared layered ceramic curved panel; design a "V"-shaped opening at the overlapping position of easy wrinkles; and the overlapping pos...
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Abstract
The invention discloses a method for preparing a layered ceramic curved panel, which comprises the following specific steps: 1) preparing a ceramic green sheet with a thickness of 0.1-5mm; Layers of ceramic green sheets are cut, and the cut ceramic green sheets ensure that there is a gap between the edge and the inner wall of the mold when the mold is loaded; 3) The cut ceramic green sheets are stacked, and material folds and overlaps are easy to occur during molding Cut a "V"-shaped opening in the area, put it into a steel mold, and heat it at 30-380°C, 50-500 kgf / cm 2 Compression molding under pressure, and heat preservation for 0.5-5h; the invention utilizes the improvement of the fluidity of the binder in the heated state, reduces fold overlap by cutting the "V"-shaped opening, and heats the compression molding to promote the flow of the powder, making the green body Converts from normal to vertical contour and heals clipped cuts.
Description
technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a preparation method of 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 the alternate lamination of different materials to increase the energy required for crack propagation, which can greatly increase the toughness and fracture work of the material, reduce the defect sensitivity, and improve the brittleness of the ceramic. The preparation of layered composite ceramic materials can be divided into two types: one-piece molding method and pre-sheet lamination meth...
Claims
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IPC IPC(8): C04B35/622C04B35/638C04B35/64C04B35/634C04B35/636
CPCC04B35/622C04B35/638C04B35/64C04B35/63416C04B35/6342C04B35/63424C04B35/6365C04B2235/612C04B2235/604C04B2235/6562C04B2235/6567C04B2235/6581C04B2235/6586C04B2235/77
Inventor 洪于喆邬国平谢方民熊礼俊戚明杰于明亮郭岱东蔡宁宁邹东平杨连江
Owner NINGBO VULCAN TECH CO LTD