| 发明名称 |
CATHODE COMPONENT FOR DISCHARGE LAMP |
| 摘要 |
A highly durable cathode component for a discharge lamp is provided. A cathode component for a discharge lamp includes a barrel having a wire diameter of 2 to 35 mm and a tapered front end, wherein the cathode component comprises a tungsten alloy containing 0.5 to 3% by weight, in terms of oxide (ThO2), of a thorium component, not less than 90% of tungsten crystals are accounted for by tungsten crystals having a grain size in the range of 1 to 80 μm, as observed in terms of an area ratio of 300 μm×300 μm in unit area in a circumferential cross section of the barrel, and are accounted for by tungsten crystals having a grain size in the range of 10 to 120 μm, as observed in terms of an area ratio of 300 μm×300 μm in unit area in a side cross section of the barrel. |
| 申请公布号 |
US2015028738(A1) |
申请公布日期 |
2015.01.29 |
| 申请号 |
US201314378983 |
申请日期 |
2013.02.13 |
| 申请人 |
KABUSHIKI KAISHA TOSHIBA ;TOSHIBA MATERIALS CO., LTD. |
发明人 |
Aoyama Hitoshi;Tatesawa Masahiro;Kitamori Noboru |
| 分类号 |
H01J61/067;H01J61/073 |
主分类号 |
H01J61/067 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A cathode component for a discharge lamp, the cathode component comprising: a barrel having a wire diameter of 2 to 35 mm; and a tapered front end, wherein
the cathode component comprises a tungsten alloy containing 0.5 to 3% by weight, in terms of oxide (ThO2), of a thorium component, not less than 90% of tungsten crystals are accounted for by tungsten crystals having a grain size in the range of 1 to 80 μm, as observed in terms of an area ratio of 300 μm×300 μm in unit area in a circumferential cross section of the barrel, and not less than 90% of tungsten crystals are accounted for by tungsten crystals having a grain size in the range of 10 to 120 μm, as observed in terms of an area ratio of 300 μm×300 μm in unit area in a side cross section of the barrel. |
| 地址 |
Tokyo JP |
