ELECTRODE ALLOY FOR FLUORESCENT DISCHARGE TUBE, ELECTRODE FOR THE FLUORESCENT DISCHARGE TUBE AND THE FLUORESCENT DISCHARGE TUBE PROVIDED WITH THE ELECTRODE

摘要

PROBLEM TO BE SOLVED: To provide an electrode alloy for fluorescent discharge tube, improving the brightness of a lamp and superior in its moldability, an electrode for fluorescent discharge tube and a fluorescent discharge tube provided with the electrode.;SOLUTION: The electrode alloy for the fluorescent discharge tube is formed by Ni-W alloy containing 2.0 to 10 mass% of W and the remainder substantially from Ni, Ni-W-Nb alloy, Ni-W-Ta alloy or Ni-W-Nb-Ta alloy containing 2.0 to 6.0 mass% of W and 0.5 to 2.0 mass% in total weight of one or two type(s) of elements of either Nb or Ta and the remainder substantially from Ni. The electrode for the fluorescent discharge tube 2 is formed by the electrode alloy and is provided with a tube part 3 with one end open and an end plate part 4 sealing the other end of the tube part 3. The end plate part 4 is formed thicker than the tube wall thickness of the tube part 3. In the end plate part 4, a recessed part 6 for aligning a conductor for power feeding can be formed into a concentric state to the tube part 3.;COPYRIGHT: (C)2004,JPO&NCIPI