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Production of solid pump for discharge light with low pressure gas

A gas discharge lamp, low pressure technology, applied in the parts of gas discharge lamps, the manufacture of discharge tubes/lamps, the manufacture of electrode systems, etc., can solve the problem of particle weight, size and shape consistency, uneven composition, harmful to environmental protection and personal health and other issues, to achieve the effect of high one-time pass rate, low production cost and good photoelectric parameters

Inactive Publication Date: 2006-05-31
FOSHAN COMWIN LIGHT & ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. The amalgam may contain a small amount of water or oil, which will be released slowly after being injected into the lamp tube, which will affect the quality of the lamp; 2. The difference in the specific gravity of each metal in the amalgam in the molten state will cause It leads to the stratification of the melt, and the relatively large mercury is easy to deposit in the lower layer, making the composition of each amalgam particle uneven; 3. It is impossible to guarantee the consistency of the particle weight, size and shape after spray cooling and forming
4. The use of lead-containing amalgam is harmful to the environment and human health
The molten body used abroad is cooled by spraying inert gas or cooled by a molten spray tower, which also has the disadvantages of stratification of the melt, uneven composition of amalgam particles, and poor consistency of particle weight, size and shape.

Method used

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  • Production of solid pump for discharge light with low pressure gas

Examples

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Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: Solidification is the solidification of two metal powders and mercury, and mixing is the mixing of two metals in the form of amalgam and one metal. Mix Hg, Zn powder, and Bi powder in a weight ratio of 45:43:12 and place them in a closed tank, vacuumize, fill with 20 torr high-purity argon, heat to 180°C, and keep warm for 1.0 hour to obtain the Zn powder and Bi powder in the form of amalgam are added with 1% Ag powder by weight of the amalgam powder, fully mixed and pressed into a cylinder. The solid mercury is used to replace liquid mercury in various exposed fluorescent lamps such as fluorescent lamps, ring fluorescent lamps, and compact fluorescent lamps. It has good low-temperature starting performance of liquid mercury, and better high-temperature performance than liquid mercury. Zn-Hg alloy, because the addition of Bi reduces the amount of residual mercury that Zn-Hg alloy cannot completely release at normal working temperature.

Embodiment 2

[0009] Embodiment 2: solidification is a kind of metal powder, a kind of metal block and mercury melting and solidification, mixing is a kind of amalgam and a kind of metal are mixed. Mix Hg, Bi powder, and In blocks in a weight ratio of 6:63:31 and place them in a reactor, vacuumize, fill with 0.2MPa high-purity argon, heat to 200°C, keep warm for 2 hours, and melt to obtain Melt amalgam with 6% mercury, crush it into powder, add Ag powder with 1% by weight of Bi-In-Hg alloy, mix well, extrude and cut into cylinders, the melting temperature of this solid mercury is higher than that of Bi with 6% mercury -In-Hg is high, the particle surface is not easy to spill mercury.

Embodiment 3

[0010] Embodiment 3: Solidification is solidification of a metal alloy powder and mercury, and mixing is mixing an amalgam. Mix Bi-Sn alloy powder and mercury in a weight ratio of 90:10 and place in a closed tank, vacuumize, fill with 100 torr high-purity argon, heat to 90°C, and keep warm for 3 hours to obtain mercury-containing 10 % Bi-Sn-Hg amalgam powder, fully mixed, pressed into a sphere.

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Abstract

A solid mercury (Hg) used for low-pressure gas discharging lamp is prepared proportionally from Hg and others chosen from Bi, Zn, Sn, Ga, In, Cu and Ag through filling inertial gas or vacuumizing, soildifying, pulverizing, sieving, mixing and shaping.

Description

technical field [0001] The invention relates to a preparation method of solid mercury for lighting, in particular to a preparation method of solid mercury for low-pressure gas discharge lamps. Background technique [0002] At present, in the preparation process of amalgam for low-pressure gas discharge lamps, as described in patent 88104082.7, when metal and mercury are heated and melted, water or oil is used for isolation protection to prevent the evaporation of mercury vapor, and the amalgam melt is then sprayed. The coolant cools the shape. Its disadvantages are: 1. The amalgam may contain a small amount of water or oil, which will be released slowly after being injected into the lamp tube, which will affect the quality of the lamp; 2. The difference in the specific gravity of each metal in the amalgam in the molten state will cause It leads to stratification of the melt, and the relatively large mercury is easy to deposit in the lower layer, making the composition of ea...

Claims

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Application Information

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IPC IPC(8): H01J9/00C22C7/00H01J61/12H01J61/28
Inventor 何志明
Owner FOSHAN COMWIN LIGHT & ELECTRICITY
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