Porous ceramic composite material and preparation method thereof: Fid-Bau Portal

Porous ceramic composite material and preparation method thereof

ZHANG NANQUAN / ZHANG WEIQUN

The invention discloses a porous ceramic composite material and a preparation method thereof, and relates to the technical field of porous ceramic processing. The porous ceramic composite material disclosed by the invention is composed of silicon dioxide, diatomite, aluminum powder and modified cellulose, and is prepared by the following steps: uniformly mixing the components, conducting grindingto form mixed powder, adding paraffin into the mixed powder, conducting uniform mixing, carrying out freeze drying to obtain a porous ceramic precursor, and carrying out high-temperature sintering onthe porous ceramic precursor. The porous ceramic composite material provided by the invention has very high porosity and uniform pore distribution, and the pore size and shape can be controlled. The porous ceramic composite material can also be used for storing hydrogen, has the characteristics of high hydrogen storage capacity, simple hydrogen absorption and desorption operation, high-temperatureand high-pressure resistance and the like, is good in cycling stability and can be repeatedly used for multiple times, and the prepared product is high in strength and not easy to deform.

本发明公开一种多孔陶瓷复合材料及其制备方法，涉及多孔陶瓷加工技术领域。本发明公开的多孔陶瓷复合材料是由二氧化硅、硅藻土、铝粉和改性纤维素组成，通过将组分物均匀混合并研磨成混合粉末，然后将石蜡加入到混合粉末中混合均匀，冷冻干燥制得多孔陶瓷前驱体，再将多孔陶瓷前驱体高温烧结而制得。本发明提供的多孔陶瓷复合材料具有很高的孔隙率，且孔隙分布均匀，并可控制孔隙大小和形状。本发明还可用于贮存氢气，具有贮氢容量高、吸放氢操作简单、耐高温高压等特性，循环稳定性好，可重复多次使用，且制备的制品强度高、不易变形。

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