Alloy composite brazing material for ceramics or glass

Abstract

The invention discloses an alloy composite brazing material for ceramics or glass. The alloy composite brazing material comprises the following substances in parts by weight: 35-46 parts of aluminum-based quasi-crystal alloy powder, 25-31 parts of brass powder, 5-17 parts of spheroidal graphite cast iron powder, 11-17 parts of ethylene-vinyl acetate copolymer, 3-6 parts of acrylic resin, 5-14 parts of aluminum oxide, 4-9 parts of polyurethane, 5-12 parts of antimonous oxide, 10-32 parts of n-pentane, 11-20 parts of polyvinyl alcohol and 5-20 parts of alkylbenzene. With the adoption of the alloy composite brazing material, brazing layers are uniform and the structure is reasonable relatively, so that the wettability of the brazing materials, the thermal fatigue resistance of welding lines, the air-tightness performance of brazing lines and the intensity of welding joints are increased; the cost of atmosphere welding is reduced; and the working efficiency is improved. The alloy composite brazing material can be conveniently applied to semiconductor and photoelectron packaging, and particularly, the application of the alloy composite brazing material to packaging of various windows of optical communication windows, infrared windows and the like can meet operating requirements.

Description

technical field [0001] The invention relates to an alloy composite brazing material for ceramics or glass. Background technique [0002] In the prior art, for the connection between glass and glass, ceramics and ceramics, between glass or ceramics and metal, a low-temperature brazing welding method is usually used, and the brazing solder used is gold (Au) tin (Sn) Alloy solder, because gold-tin solder has the characteristics of high strength, good oxidation resistance, excellent thermal fatigue and creep resistance, low melting point, and good fluidity. However, since Au is an element of group IB, and Sn is an element of group IVA, the diffusion mechanism of Au and Sn is an interstitial mechanism, and the diffusion speed is very fast. The phase diagram of gold-tin binary alloy is very complicated, and there are many intermediate phases, and these intermediate phases are all It is a hard and brittle phase, so it often affects the quality of brazed joints, for example, the st...

AI Technical Summary

Problems solved by technology

However, since Au is an element of group IB, and Sn is an element of group IVA, the diffusion mechanism of Au and Sn is an interstitial mechanism, and the diffusion speed is very fast. The phase diagram of gold-tin binary alloy is very complicated, and there are many intermediate phases, and these intermediate phases are all It is a hard and brittle phase, so it often affects the quality of brazing joints, for example, the strength is poor, the airtight performance cannot meet the requirements, etc., especially in the use of optoelectronic packaging, it cannot meet the use requirements