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Fusion sealing materials

  • US 5,089,445 A
  • Filed: 10/09/1990
  • Issued: 02/18/1992
  • Est. Priority Date: 10/09/1990
  • Status: Expired due to Fees
First Claim
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1. A sealing material comprising a lead sealing glass and a mill addition of a pyrophosphate crystalline material selected from the group consisting of magnesium pyrophosphate, a magnesium pyrophosphate with at least a portion of the magnesium ions replaced by at least one cation selected from the group composed of cobalt, arsenic, zinc, iron, aluminum and zirconium, and a crystallized phosphate glass composed essentially of P2 O5 and one or more cations selected from the group composed of magnesium, cobalt, arsenic, zinc, iron, aluminum and zirconium.

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