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A technology of wood ceramics and raw materials, applied in the field of preparation of wood ceramics, can solve the problems of easy deformation and cracking of materials, uneven product texture, high brittleness of wood ceramics, etc., and achieve high yield, high specific strength, and reduced scrap rate Effect
Inactive Publication Date: 2015-04-08
太仓顺如成建筑材料有限公司
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[0003] At present, in the production process of wood ceramics, the preparation process is relatively complicated, the product texture is uneven, and the reject rate is high, resulting in increased costs, and the obtained wood ceramics are brittle and low in toughness, and are prone to occur due to the shrinkage of the material during the sintering process. deformation and cracking
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[0017] A method for preparing wood ceramics, comprising the following steps: a, raw material preparation: preparing carbon powder, silicon carbide powder, phenolic resin and additives required for the preparation in proportion; b, mixing and drying: preparing the prepared carbon powder Add silicon carbide powder into phenolic resin, then add additives in turn, stir evenly and dry at 60°C for 50 minutes; c. Preliminary molding: control the dried mixed raw materials at a temperature of 80°C and a pressure of 7MPa Under hot pressing for 1.5h, the green body is formed, and then the impurities on the surface are cleaned by 22% hydrochloric acid, washed with distilled water after removal of impurities, and finally dried at room temperature; Under high temperature carbonization, first raise the temperature to 150°C, keep it warm for 30 minutes, and the pressure is 15MPa, then raise the temperature to 250°C, 600°C, 800°C, 1000°C, 1200°C, 1600°C in turn, and hold it for 50 minutes at ea...
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Abstract
The invention relates to a method for preparing wood ceramic. The method comprises the following steps: 1, preparing raw materials; 2, mixing, and drying; 3, carrying out preliminary molding; and 4, carrying out charring molding: carrying out high temperature charring on an impurity-removed dried body in inert atmosphere, rising the temperature to 150DEG C, carrying out heat insulation at 15MPa for 30min, sequentially rising the temperature to 250DEG C, 600DEG C, 800DEG C, 1000DEG C, 1200DEG and 1600DEG C, carrying out heat insulation at each of the above temperature points for 50min, and carrying out reduced pressure cooling to room temperature to obtain a finished product. The wood ceramic prepared in the invention has the advantages of light weight, porosity, high specific strength, high specific surface area, good electromagnetic performances, strong thermal shock resistance, wear resistance, corrosion resistance and small expansion coefficient; and the preparation method has the advantages of simple process, high yield, scrap rate reduction and production cost reduction.
Description
technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing wood ceramics. Background technique [0002] As environmental issues are getting more and more attention, the demand for new materials is also increasing. The development and utilization of solid waste and renewable biomass resources is particularly important for protecting the environment. Wood is a natural resource that can be recycled, and the preparation of ceramics from wood has become an important research direction. Wood ceramics is a porous carbon material obtained by impregnating wood or other wood materials with resin and carbonizing at high temperature. , functional materials, and structural materials. Due to the special structure of wood ceramics, it has good mechanical properties, thermal properties, electromagnetic properties and tribological properties. After processing, it is expected to replace traditional ceramics and can be potent...
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