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Preparation process of ceramic composite membrane with metal protective layer

A technology of ceramic composite membrane and metal protective layer, applied in the field of membrane separation, can solve the problems of large adhesion of the membrane layer, large thermal expansion difference between metal and ceramic materials, etc., and achieve the effect of high connection strength, sealing and mechanical strength.

Active Publication Date: 2020-06-05
江苏七禾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main methods of preparing ceramic coatings are spraying, brushing, negative pressure suction, etc. However, due to the large difference in thermal expansion between metal and ceramic materials, the adhesion of the film layer is a big problem

Method used

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  • Preparation process of ceramic composite membrane with metal protective layer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. The ceramic membrane is φ16*2 mm, the rigid outer mold is a φ25*2 mm ceramic tube, and the head is made of stainless steel. The stainless steel powder with a particle size of 200 μm is put into the ceramic membrane, rigid outer mold and head. inside the mold;

[0020] 2. High-temperature sintering in a hydrogen atmosphere, the sintering temperature is 1200°C, heat preservation for 5 hours, and the composite film can be obtained by removing the rigid outer mold after cooling and taking it out.

Embodiment 2

[0022] 1. The ceramic membrane is made of φ32 mm 7-channel membrane tube, the rigid outer mold is made of φ40*2 mm molybdenum alloy tube, and the head is made of stainless steel. The stainless steel powder with a particle size of 50 μm is put into the ceramic membrane, rigid outer mold and In the mold composed of the head;

[0023] 2. High-temperature sintering in a helium atmosphere, the sintering temperature is 1050°C, heat preservation for 3 hours, cooling and taking out, removing the rigid outer mold to obtain a composite film.

Embodiment 3

[0025] 1. The ceramic membrane is φ16*2 mm, the rigid outer mold is φ25*2 mm ceramic tube, and the head is made of titanium metal. Titanium powder with a particle size of 100 μm is put into the ceramic membrane, rigid outer mold and head. inside the mold;

[0026] 2. High-temperature sintering under an argon atmosphere, the sintering temperature is 1200°C, heat preservation for 6 hours, and the composite film can be obtained by removing the rigid outer mold after cooling and taking it out.

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Abstract

The invention discloses a preparation process of a ceramic composite membrane with a metal protective layer. A mold comprises a ceramic membrane, metal powder, a rigid outer mould and an end socket. The preparation method comprises the following specific steps: putting the metal powder for preparing a ceramic membrane protective layer into the mold consisting of the ceramic membrane, the high-temperature-resistant rigid outer mold and the end socket, sintering at high temperature in vacuum or reducing atmosphere, and removing the outer mold to form the ceramic composite membrane material withthe metal protective layer. The prepared ceramic-metal composite membrane is good in thermal shock resistance and high in mechanical strength, the end socket and the metal powder are directly sinteredtogether, the problem of poor welding sealing performance can be effectively avoided, and the use temperature of the membrane can be increased by 900 DEG C from 150 DEG C.

Description

technical field [0001] The invention belongs to the field of membrane separation, and in particular relates to a preparation process of a ceramic composite membrane with a metal protection layer. Background technique [0002] Porous ceramic membrane Ceramic membrane has many advantages such as high separation precision, good chemical stability, bacteria resistance, high temperature resistance, simple separation process, low energy consumption, easy operation and maintenance, and long service life. However, ceramic materials are brittle, have poor toughness, and their mechanical strength is not as good as that of metal materials. [0003] At present, research on the mechanical strength of ceramic membranes is mainly focused on the improvement of ceramic materials. Patent CN104387111B discloses a preparation method for a high-strength ceramic membrane support. The strength of the ceramic membrane support is made of highly densified corundum particles and in situ generated mul...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/02B01D67/00
CPCB01D67/0039B01D69/12B01D71/02B01D71/022B01D2325/24
Inventor 俞健杨佳辉王莉莉
Owner 江苏七禾新材料科技有限公司
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