Tdk Corporation

Hiroaki Abe

Shoichi Iwaya

Munemitsu Hamada

Haruo Taguchi

Masaru Fukuda

The present invention provides an electrode for a ceramic electrode fluorescent discharge lamp; an electrode material for a discharge lamp, which has high electron flow density, high thermal shock resistance, and reduced deterioration due to sputtering; and also a method for manufacturing the same. The invention makes it possible to reduce the tube diameter of the ceramic electrode fluorescent discharge lamp. An electrode material for a discharge lamp is obtained from a first component of 0.5 to 1.5 mols of BaO, CaO or SrO, a second component of 0.05 to less than 0.3 mols or more than 0.7 to 0.95 mols of ZrO,or TiO,, and a third component of 0.025 to less than 0.3 mols of V,O,, Nb,O,, Ta,O,, Sc,O,, Y,O,, La,O,, Dy,O,, or Ho,O,, or 0.05 to less than 0.15 mols or more than 0.35 to 0.95 mols of HfO,, CrO,, MoO,or WO,. This electrode material is granulated and is turned into a massive, granular, or porous electrode material. This is placed in a cylindrical semiconductor ceramic container with a closed bottom and is reduced and fired to prepare an electrode. A mercury dispenser of the ceramic electrode fluorescent discharge lamp is disposed in series between the cylindrical semiconductor ceramic container with a closed bottom and a lead-in portion of the lead wire.

Growing community of inventors

Honjo, Japan

Hiroaki Abe