Method of preparing bore diameter gradient FeAl intermetallic compound homogeneity filtering membrane

Abstract

The invention discloses a method for preparing aperture grads FeAl metal intermetallic compound Homogeneous filtering membrane, which adopts Fe and Al element powder of component matching and particle size matching. By the way of die pressing and isostatic cool pressing, make out platy or tubular filtering adobe, then adopts the way of magnetron sputtering, ion plating or vacuum evaporation to plate a layer of metal Al membrane and a layer of metal Fe membraqne on one surface of the filtering adobe evenly, and also adopts the way of non pressure sintering, prepare FeAl metal intermetallic compound homogeneous filtering membrane finally. The method doesn't need adding pore former during preparing process, lowers energy consumption almost without pollution. The prepared filtering membrane has good antioxidation performance, antisulfuration performance and anticorrosion performance, which increase the service life of inorganic membrane and can be widely used in strict environment field, in particular the filtering, separating, purifying and contracting in high temperature, strong corrosion and sulfuration environment filed.

Description

technical field [0001] The invention relates to a production technology for preparing filter membrane materials, in particular to a technical method for preparing a pore size gradient FeAl intermetallic compound homogeneous filter membrane through composite forming and reaction synthesis of Fe and Al element powders. Background technique [0002] The filter membrane is driven by external energy or chemical potential difference to separate, classify, purify and enrich the gas or liquid mixed with two or more components. Most of the process has no phase change, and it has high efficiency, energy saving and simple process. , less investment, less pollution and other advantages, it is widely used in various production and research departments of the national economy and the field of national defense construction. Separation membranes can be divided into inorganic membranes and organic polymer membranes according to the preparation materials. Among them, inorganic membranes have ...

AI Technical Summary

Problems solved by technology

These preparation technologies often have disadvantages such as complex process, high cost, and difficulty in controlling the pore size of the filter membrane.

Compared with the preparation process, the quality of inorganic membranes is limited by the materials used to a greater extent

For metal materials, their oxidation resistance and acid and alkali corrosion resistance are often poor, which greatly restricts the use environment of the filter membrane, and the structure stability of metal materials is poor, and the service life is short. At the same time, due to hydrogen embrittlement Difficult to compound with other dense membranes

For ceramic materials, since the ceramic is a hard and brittle phase, the solid particle sintering method is used to prepare the filter membrane. The formability and sintering performance of the ceramic particles are often poor, and the energy consumption in the production process is high. At the same time, the ceramic is brittle and difficult to weld and assemble. Disadvantages limit the application of ceramic membranes