Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Metal/ceramic/metal symmetric gradient structure sealing insulating material and preparation method thereof

Pending Publication Date: 2021-01-05
WUHAN UNIV OF TECH
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface metallization of nitride ceramics prepared based on traditional technology will have an obvious ceramic / metal phase interface, which cannot achieve long-term sealing in the harsh service environment of this energy storage technology. Therefore, it is urgent to carry out research on new surface metallization technology of nitride ceramics.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metal/ceramic/metal symmetric gradient structure sealing insulating material and preparation method thereof
  • Metal/ceramic/metal symmetric gradient structure sealing insulating material and preparation method thereof
  • Metal/ceramic/metal symmetric gradient structure sealing insulating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The invention relates to a metal / ceramic / metal symmetrical gradient structure sealing insulating material and a preparation method thereof. The ceramic materials are mainly nitride ceramics, including one or more of AlN, Si3N4, and BN. Metal materials include two types, one of high melting point metal W and Mo, one of expansion alloy (4J33 alloy), Kovar alloy (4J29 alloy) and stainless steel 304 (SUS304) with good additivity. The preparation method of the material includes two stages: in the first stage, the ceramic and metal powders are uniformly mixed according to the proportion of each group, and the layer-by-layer stacking is designed according to the gradient structure and combined with the hot-pressed co-firing technology to obtain a metal / ceramic / metal gradient composite material; the second stage In the first stage, welding technology is used to connect dissimilar metals to the metal sides at both ends of the composite material, combined with mechanical drilling...

Embodiment 1

[0040] A metal / ceramic / metal symmetric gradient structure sealing insulating material, the structure schematic diagram is as follows figure 1 Shown, its preparation method concrete steps are as follows:

[0041] Select an appropriate amount of AlN ceramic powder and Mo powder to prepare the gradient intermediate layer 2 raw materials, according to the mass percentage of AlN ceramic powder and Mo powder: 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7 : 3, 8: 2, 9: 1 ratio to prepare 9 parts of mixed powder, each mixed powder 0.5g, after ball milling, it will be used as the raw material of each layer of gradient middle layer 2 for later use.

[0042] The high melting point metal layer 3 (Mo, the dosage is 4g), the gradient intermediate layer 2, the nitride ceramic layer 1 (AlN ceramic powder, the dosage is 2g), the gradient intermediate layer 2, the high melting point metal layer 3 (Mo, the dosage is 4g ) raw material powder according to figure 1 The structures shown are sequentially stacked...

Embodiment 2

[0047] A metal / ceramic / metal symmetric gradient structure sealing insulating material, the specific steps of its preparation method are as follows:

[0048] Select an appropriate amount of AlN ceramic powder and Mo powder to prepare the gradient intermediate layer 2 raw materials, and prepare 5 parts according to the mass percentage of AlN ceramic powder and Mo powder: 1:9, 3:7, 5:5, 7:3, 9:1 Mixed powder, 1g of mixed powder per part, after ball milling, it will be used as the raw material of each layer of gradient middle layer 2 for later use.

[0049] The high melting point metal layer 3 (Mo, the dosage is 4g), the gradient intermediate layer 2, the nitride ceramic layer 1 (AlN ceramic powder, the dosage is 2g), the gradient intermediate layer 2, the high melting point metal layer 3 (Mo, the dosage is 4g ) raw material powder according to figure 1 The structures shown are sequentially stacked into a graphite mold with an inner diameter of 25mm, and the raw materials of each...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Outer diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a metal / ceramic / metal symmetric gradient structure sealing insulating material and a preparation method thereof. The sealing insulating material comprises a high-machinabilitymetal layer (4), a high-melting-point metal layer (3), a gradient middle layer (2), a nitride ceramic layer (1), a gradient middle layer (2), a high-melting-point metal layer (3) and a high-machinability metal layer (4) from top to bottom in the thickness direction, wherein the gradient middle layer (2) is obtained by sintering high-melting-point metal powder and nitride ceramic powder; the content of high-melting-point metal in the gradient middle layer (2) is distributed in a gradient mode, and is gradually reduced in the direction from the high-melting-point metal layer (3) to the nitrideceramic layer (1); and the mass fraction is reduced to 0-10% from 90-100%. The sealing insulating material provided by the invention has very high designability, is suitable for extremely complex working environments such as long-time high temperature and strong corrosion, and has relatively high high-temperature stability, corrosion resistance and insulating sealing performance.

Description

technical field [0001] The invention belongs to the technical field of sealing materials, and in particular relates to a metal / ceramic / metal symmetric gradient structure sealing insulating material and a preparation method thereof. Background technique [0002] Nitride ceramics have been widely used in structural materials, electronic packaging materials, and luminescent materials due to their excellent high thermal conductivity, high insulation resistance, strong corrosion resistance, low dielectric constant, and thermal expansion coefficient similar to silicon. Whether it is used as a substrate, package or high-temperature sealing material, it involves the problem of ceramic surface metallization or metal sealing. However, as a compound with strong covalent bonds, nitride ceramics are difficult to wet with metals at high temperatures, and it is quite difficult to implement metallization. At present, the surface metallization methods of nitride ceramics that have been deve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22F7/04B22F3/14B22F3/16B22F5/10F16J15/00
CPCB22F7/04B22F3/14B22F3/162B22F5/106F16J15/00B22F2007/042B22F2999/00
Inventor 陈斐贾明勇刘洋古星沈强张联盟
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com