Low temperature co-fired high precision metal filter membrane and its preparation method and use

By using a support powder mixture of 316L stainless steel powder and low melting point powder, and using isostatic molding and one-time low temperature co-sintering method, the problems of low production efficiency and high energy consumption of the filters of the high-temperature gas-cooled relay fuel loading and unloading system in the prior art are solved, and high efficiency and low cost high-precision metal filter membrane preparation is achieved.

CN119733379APending Publication Date: 2025-04-01AT&M ENVIRONMENTAL ENG TECH CO LTD
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Patent Information

Application Number
CN202411916357.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

The prior art requires two sinterings when preparing high-precision metal filter membranes with an asymmetric structure, resulting in low production efficiency, high energy consumption, high cost, and difficult to obtain the best pore size and filter accuracy.

Method used

A support powder mixture containing 316L stainless steel powder and low melting point powder was used to form a low temperature co-fired high-precision metal filter membrane with an asymmetric structure by isostatic molding and a single low temperature co-sintering.

Benefits of technology

A one-time co-sintering at lower temperatures is achieved to obtain a metal filter membrane with sufficient overall strength, reducing costs and energy consumption, improving production efficiency, and meeting the best matching of filtration accuracy and strength.

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Abstract

The present invention relates to the field of filtration separation. The present invention provides a support powder mixture for forming a support body when preparing a high-precision metal filter membrane with an asymmetric structure and a method for preparing the high-precision metal filter membrane with an asymmetric structure from the support powder mixture. The present invention also relates to a low-temperature co-fired high-precision metal filter membrane with an asymmetric structure prepared and its use. The support powder mixture contains 316L stainless steel powder and a low melting point powder with a melting point difference in the range of about 100-500°C, so that the sintering temperature required to form the support body from the support powder mixture is substantially the same as the sintering temperature required to form a high-precision metal filter membrane layer from 316L stainless steel micropowder. The present invention realizes that a low-temperature co-fired high-precision metal filter membrane with an asymmetric structure having sufficient overall strength and filtration accuracy can be obtained by sintering once at a relatively low temperature, thereby reducing costs and energy consumption and improving production efficiency.
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