Collector tube glass-metal double-port hot-pressing sealing material and method

• Main Authors: CUI JUNKUI, ZHAO GUOHUA, ZHAO JUN, ZHANG YUTIAN
• Format: Patent
• Language: Chinese; English
• Published: 26.01.2011
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

The invention is a hot pressing sealing process, which is based on the solid state welding technology and belongs to the glass and metal sealing technology field. The process is characterized in that firstly, the sealing is conducted under heat and pressure; secondly, two curved symmetric glass flanges are adopted at the sealing part of a glass tube to support the force when under pressure; thirdly, alloy solder wires melted from Lead, Aluminum and Tin are adopted as sealing materials; fourthly, the sealing temperature is 0.7-0.9 times of the melting point of alloy metal solders, the applied impact pressure during the welding is 70-200kg/cm , and the reaction time is 0.5s-1.5min; fifthly, the expansion coefficient of a heat-collecting glass tube is (3.2-3.4)*10<-6>/degree Celsius; sixthly, a metal end cover adopts low expansion alloys of iron-nickel or Kovar, etc. The double-port hot pressing sealing process can effectively reduce the sealing area of the glass flange and the metal end surface and reduce the e