| 摘要 |
982,286. Electric cables. ANACONDA WIRE & CABLE CO. Aug. 9, 1963 [Dec. 31, 1962], No. 31582/63. Heading H1A. A composite electrical conductor for use at high temperatures comprises an outer oxidation-resistant metallic sheath 14, a copper core 11, and a barrier layer 12 which consists of a metal occurring in Group IVA, VA or VIA of the Periodic Table, preferably niobium, tantalum or titanium, and which obviates a decrease in conductivity of the conductor due to migration of ions from the sheath to the core. A copper layer 13 which prevents the sheath cracking may be sandwiched between the barrier layer and the core and traces of aluminium oxide 15 may be dispersed within the copper core to prevent the surface of the core cracking. The metallic outer sheath 14 may be of stainless steel or of an alloy containing nickel, chromium and iron. Preferable proportions of these metals are given in the Specification. |
