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Bi-Pb-Ti-Hg alloy for low pressure Hg discharge lamp

A discharge lamp and low-pressure technology, applied in the field of bismuth-lead-tin amalgam, can solve the problems of reduced radiation efficiency, low luminous efficiency, large dispersion of optoelectronic parameters, etc., and achieve the effects of improving stability and high luminous efficiency

Inactive Publication Date: 2009-04-29
FOSHAN COMWIN LIGHT & ELECTRICITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there is an inflection point where the mercury vapor pressure drops in the characteristic curve of the mercury vapor pressure of the amalgam as a function of temperature, the mercury vapor pressure near the inflection point temperature is low. Due to the discreteness of some lamps, when the amalgam is in this temperature range, the 253.7nm ultraviolet rays The radiation efficiency is reduced and the luminous efficiency is low, which leads to large dispersion of the photoelectric parameters of the lamp

Method used

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  • Bi-Pb-Ti-Hg alloy for low pressure Hg discharge lamp
  • Bi-Pb-Ti-Hg alloy for low pressure Hg discharge lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: The bismuth lead tin amalgam was melted and dropped into pellets by mass ratio (m / m): Bi:Pb:Sn:Hg=30:40:25:5. Among the 11w compact fluorescent lamps with outer bulb, the average luminous efficiency is high, and the light output of the lamp is stable and consistent.

Embodiment 2

[0016] Example 2: The bismuth lead tin amalgam was melted and dropped into pellets according to the mass ratio (m / m): Bi:Pb:Sn:Hg=45:22:30:3. Among the 13w compact fluorescent lamps with outer bulb, the average luminous efficiency is high, and the light output of the lamp is stable and consistent.

Embodiment 3

[0017] Example 3: Bismuth lead tin amalgam is made into pellets by mass ratio (m / m): Bi:Pb:Sn:Hg=32:27:40:1, which can be applied to pipe diameter φ10mm and power 9 -15w in compact fluorescent lamp with outer bulb.

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Abstract

The invention discloses an amalgam for a low-pressure gas discharge lamp, which is an alloy containing Bi, Pb, Sn and Hg, wherein the mass ratio of the Bi to the Pb to the Sn to the Hg is 30- 45 to22-40 to 25-40 to 1-8). Through the amalgam prepared by a routine manufacturing method, mercury vapor of a lamp in a working temperature area can be stably controlled approximately 1.5 Pa; the low-pressure mercury discharge lamp with small caliber has high luminous efficiency; meanwhile, liquid phase temperature of the alloy is improved and fluidity of the amalgam at working temperature is reduced. Compared with the prior art, the lamp has the advantages of high light efficiency, and good stability and consistency.

Description

technical field [0001] The invention relates to the technical field of solid amalgam materials, in particular to a bismuth-lead-tin amalgam for low-pressure mercury discharge lamps. Background technique [0002] In the low-pressure mercury discharge tube, the mercury atoms are excited to generate 253.7nm ultraviolet radiation. When the 253.7nm ultraviolet radiation radiated by the mercury atoms is irradiated on the adjacent ground state mercury atoms, resonance absorption will occur, and the mercury atoms that generate resonance absorption may interact with other electrons, The atoms collide and cannot re-radiate ultraviolet photons at 253.7 nm. When the mercury atomic concentration is low, the 253.7nm ultraviolet radiation increases with the increase of the mercury atomic concentration. When the concentration of mercury atoms is high, the conversion efficiency of 253.7nm UV decreases, and the luminous efficiency decreases. There is an optimum mercury vapor pressure in the...

Claims

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Application Information

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IPC IPC(8): C22C30/04
Inventor 何志明
Owner FOSHAN COMWIN LIGHT & ELECTRICITY
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