High-temperature resistant metal sealing material for mixed conductor oxygen permeable ceramic membrane and application method thereof

Abstract

The invention relates to a preparation method of a high-temperature resistant metal sealing material for a compact mixed conductor oxygen permeable ceramic membrane and a sealing application method of the material, in particular to a preparation method of the sealing material between a compact mixed conductor oxygen permeable ceramic membrane piece and a supporting component thereof and an application method of the sealing material, belonging to the technical field of a special ceramic welding material. The high-temperature resistant metal sealing material comprises the following components in weight percentage: 92-95% of Cu, 4-7% of Sn, 0-0.005% of Al, 0.1-0.3% of Zn, 0-0.05% of Fe, 0.04-0.2% of Pb, 0.1-0.3% of Ni and 0.1-0.5% of P. The preparation method comprises the following steps: weighing raw materials according to the formula for blending; placing the mixed materials in a vacuum induction furnace the vacuum degree of which is less than 2Pam for smelting at the temperature of 1100-1150 DEG C for 3-5 minutes until the materials are molten; and cooling to room temperature, and then taking out molten blocks to finally obtain the high-temperature resistant sealing material. The sealing material obtained by the method of the invention has very high sealing tightness as well as good chemical stability on the oxygen permeable ceramic membrane.

Description

technical field [0001] The present invention relates to a preparation method of a high-temperature-resistant sealing material for a dense mixed-conductor oxygen-permeable ceramic membrane and a method for sealing it; in particular, it relates to a sealing material between a dense mixed-conductor oxygen-permeable ceramic membrane and its supporting components The preparation method and the use method of the sealing material. It belongs to the technical field of special ceramic welding materials. Background technique [0002] Dense mixed-conductor ceramic oxygen-permeable membranes are an important class of inorganic membranes in high-temperature gas and membrane catalytic reactions, and have broad application prospects in the fields of pure oxygen preparation, fuel cells, and membrane reactors. Regardless of the laboratory basic characterization of these dense ceramic membranes or the actual large-scale application, the high-temperature sealing between the dense ceramic memb...

AI Technical Summary

Problems solved by technology

Although Ag-based alloy solders are widely used at present, the thermal expansion coefficient of Ag-based alloy solders and typical mixed conductor ceramic oxygen-permeable membrane materials with high expansion coefficients such as BaCo 0.7 Fe 0.2 Nb 0.1 o 3-δ 、Ba 0.5 Sr 0.5 co 0.8 Fe 0.2 o 3-δ There is still a big gap, and it is necessary to further design a solder alloy with a more optimized thermal expansion coefficient

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