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Porous molybdenum disilicide-based material prepared by self-propagating high temperature synthesis process, and method for preparing the same
Porous molybdenum disilicide-based material prepared by self-propagating high temperature synthesis process, and method for preparing the same
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机译:通过自蔓延高温合成工艺制备的多孔二硅化钼基材料及其制备方法
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摘要
A porous molybdenum disilicide-based material prepared by preheating a preform consisting of size-controlled molybdenum (Mo) powder and content-controlled silicon (Si) powder and igniting the preform to initiate self-propagating high temperature synthesis, and a method for preparing the same, are disclosed. The method comprises the steps of a) mixing molybdenum (Mo) powder and silicon (Si) powder in the stoichiometric ratio of 1:2; b) molding the mixed powder into a preform; c) preheating the preform under inert atmosphere; and d) igniting the top end of the preheated perform. The porous molybdenum disilicide-based material can control its pore size by appropriately controlling the size of molybdenum (Mo) powder, the content of silicon (Si) powder and preheating condition. Therefore, since the pore size gradient of the porous material is possible to form, the porous material can be used for filters with improved dirt-holding capacity.
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