Sol mixing-fine grinding-pressure method to improve the strength of mullite porous material

A porous material, mullite technology, applied in the field of new structural materials, porous materials, bioengineering, can solve the problems of uncontrollable porosity, narrow application range, low phase porosity, etc., to increase contact points and overlap , easy to operate, and the effect of improving strength
CN109180174BActive Publication Date: 2019-09-27XIAN AERONAUTICAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN AERONAUTICAL UNIV
Publication Date
2019-09-27

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Abstract

The invention discloses a method used for increasing mullite porous material strength through sol mixing-fine grinding-pressurization. The method comprises following steps: 1, sol mixing, and magneticstirring are carried out, hydrofluoric acid is added drop by drop, an obtained precursor colloid is dried to remove a disperse medium so as to obtain a dried colloid; 2, the dried colloid is subjected to ball milling so as to obtain dry colloid fine powder; 3, the dry colloid fine powder is subjected to pressing so as to obtain a block-shaped blank material; and 4, the blank material is subjectedto calcining so as to obtain the mullite porous material. The method is capable of realizing real molecule grade uniform mixing of all reactants, increasing in-suit reaction rate, promoting reactioneffect, and increasing strength without influencing the whole porosity; no complex equipment is needed by the preparation technology; and operation is simple and convenient.
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Description

technical field

[0001] The invention belongs to the technical fields of new structural materials, porous materials and bioengineering, and in particular relates to a method for improving the strength of in-situ reaction mullite porous materials by a sol mixing-fine grinding-pressurizing method. Background technique

[0002] Porous mullite has excellent properties such as good heat insulation, corrosion resistance, thermal shock resistance, high temperature stability, and low expansion coefficient, and has good applications in fields such as heat insulation, high temperature sealing, high temperature gas filtration, and molten metal filtration. The application prospect is one of the hot spots in the field of inorganic materials research. For example, Zhou Jianer et al. (Influence of aluminum raw materials on the synthesis of porous acicular mullite [J]. Journal of Ceramics, 2010, 31(1): 46-49) through the in-situ solid-state reaction sintering method, using aluminum raw mater...

Claims

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