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Cathode component for discharge lamp, and discharge lamp

A technology for cathode parts and discharge lamps, which is applied to components of gas discharge lamps, discharge lamps, gas discharge lamps, etc., and can solve problems such as durability degradation

Pending Publication Date: 2021-01-26
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional cathode parts for discharge lamps exhibit excellent durability for about 100 hours, but their durability decreases over a long period of time

Method used

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  • Cathode component for discharge lamp, and discharge lamp
  • Cathode component for discharge lamp, and discharge lamp
  • Cathode component for discharge lamp, and discharge lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] (Examples 1 to 5, Comparative Example 1)

[0095] The following two types of mixed raw material powders of thorium oxide powder and metal tungsten powder were prepared.

[0096] The first mixed raw material powder is prepared as follows. First, ammonium tungstate (APT) powder with an average particle size of 2 μm is heated to a temperature of 500° C. in the atmosphere to turn the ammonium tungstate powder into tungsten oxide powder. Next, thorium nitrate powder with an average particle diameter of 3 μm was added to the tungsten oxide powder, and pure water was added thereto, followed by uniform mixing by stirring for 15 hours or more. Next, the water was completely evaporated to obtain a mixed powder in which thorium nitrate powder and tungsten oxide powder were uniformly mixed. Next, heating was performed at a temperature of 520° C. in the air to convert the thorium nitrate powder into thorium oxide. Next, heat treatment was performed at a temperature of 800° C. in ...

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Abstract

This cathode component for a discharge lamp is provide with: a body part having a wire diameter of 2-35 mm; and a tip part tapered from the body part to the end thereof. The cathode component includesa tungsten alloy containing 0.5-3 mass% of thorium in terms of ThO2, wherein when electron backscatter diffraction analysis is performed on a region having a unit area of 90 um*90 um and located within 1 mm from the center of a cross section that passes through the center of the body part and is taken along the longitudinal direction of the body part, the area ratio of a tungsten phase having a crystal orientation, of which the orientation difference from the <101> orientation is -15 to 15 degrees, is the highest in the longitudinal inverse pole figure map.

Description

technical field [0001] Embodiments relate to a cathode member for a discharge lamp and a discharge lamp. Background technique [0002] Discharge lamps are broadly classified into low-pressure discharge lamps and high-pressure discharge lamps. Examples of low-pressure discharge lamps include various arc discharge lamps such as general lighting, special lighting used in roads and tunnels, paint curing equipment, ultraviolet (UV) curing equipment, sterilization equipment, semiconductor light cleaning equipment, etc. discharge lamp. Examples of high-pressure discharge lamps include water treatment equipment, general lighting, outdoor lighting such as stadiums, UV curing equipment, exposure equipment for semiconductors and printed circuit boards, wafer inspection equipment, and high-pressure mercury lamps such as projectors. , metal halide lamps, ultra-high pressure mercury lamps, xenon lamps, sodium lamps, etc. Such discharge lamps are used in various devices such as lighting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/06H01J61/067H01J61/073
CPCH01J61/06H01J61/073H01J61/067
Inventor 沟部雅恭青山齐友清宪治中野康彦
Owner KK TOSHIBA
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