Research on low-temperature brazing joints of copper and ceramics

The ceramic surface was metallized by copper plating on the ceramic surface. Sn99Ag0.3Cu0.7 solder paste was used to braze the copper plated ceramic with copper under the condition of a temperature of 227℃ and insulation for 2minutes. The brazed joint was observed and analyzed using an optical microscope and a scanning electron microscope. The experimental results show that copper alloy and ceramic can form a metal compound layer through brazing at low temperatures, achieving effective welding. The strength of the brazed joint is 13.2MPa.