Lead-free solder for sealing tempered vacuum glass in atmospheric environment and pressurized brazing sealing method thereof

• Main Authors: ZHANG HONGXIA, LI ZI'ANG, CAO FULEI, LI YANBING, REN PENGKAI, CHU YADONG, YANG YIBO, XU DONGXIA
• Format: Patent
• Language: Chinese; English
• Published: 22.01.2021
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention relates to a lead-free solder for sealing tempered vacuum glass in an atmospheric environment and a pressurized brazing sealing method thereof. A metal layer is prefabricated in a to-be-sealed area of the tempered vacuum glass, in the lead-free solder, In accounts for 5.0%-15.0% of the weight of the solder, Ag accounts for 0.5%-5.0% of the weight of the solder, Ga accounts for 0.05%-2.0% of the weight of the solder, the balance is Sn, and the content of inevitable impurities is smaller than 0.2%. The solder contains few components, is low in melting temperature and good in wettability, and meets the low-temperature sealing requirement of tempered vacuum glass, meanwhile, a pressurized brazing technology is adopted for sealing in the atmospheric environment, the solder can form a good sealing joint with a tempered glass substrate prefabricated with the metal layer, and the production and use requirements are met. The solder overcomes the defects of high sealing temperature, complex technological