| 摘要 |
1,203,721. Glass to metal seals. OLIN CHEMICAL CORP. 8 Jan., 1968 [11 Jan., 1967; 25 May, 1967], No. 1121/68. Heading ClM. [Also in Division B3] An annealed metal composite for bonding to glass or to ceramic comprises a copper alloy core, containing at least one alloying element selected from iron, cobalt, zirconium and chromium and having a grain size not greater than 0.050 mm. and a thermal conductivity of at least 90 BTU/sq. ft/ft/Li/‹ F‹, metallurgically bonded on both sides to a cladding alloy having a coefficient of expansion substantially equal to that of the glass or ceramic with which the composite is to be bonded. Preferably the total Fe, Co, Zr or Cr is not greater than 10% by weight of the Cu and P, B or Si is added as a deoxidizer, in total not exceeding 0.5% by weight. Cladding alloys are mainly iron alloys and a number of examples are given. The thickness of the cladding each side is preferably not more than a third of the total thickness. Bonding of the composite is preferably carried out using the process of patent 1,176,563. A cup shaped header of the composite metal has wires of Ni or Fe, Ni, Co alloy sealed therethrough by glass or ceramic poured into the cup. |
