Alloy of bonding mercury in use for gaseous discharge lamp in low pressure

Abstract

The invention discloses a solid amalgam for a low-pressure gas discharge lamp, which is an alloy containing bismuth, zinc and mercury. The mass ratio of bismuth, zinc and mercury is: Bi:Zn:Hg=20-90:0-30:5-50; The solid amalgam of the present invention prepared by conventional manufacturing methods is applied to low-pressure gas discharge lamps with high wall temperature such as compact fluorescent lamps and germicidal lamps to replace liquid mercury, so that this type of low-pressure gas discharge lamps can be heated at a temperature of 40-70 ° C. The area has a more ideal mercury vapor pressure, so as to obtain higher luminous efficiency and improve mercury efficiency. Compared with the prior art, it has better environmental performance.

Description

technical field [0001] The invention relates to a solid amalgam material, in particular to a solid amalgam for a low-pressure gas discharge lamp. Background technique [0002] During the discharge process of the low-pressure gas discharge lamp, mercury atoms are continuously excited to generate ultraviolet rays with a wavelength of 253.7nm, which are used to sterilize or excite phosphors to generate visible light. Mercury, as the excitation substance that produces 253.7nm ultraviolet rays, needs to be added into the lamp. During the treatment process when the lamp is broken or the life of the lamp ends, mercury will cause environmental pollution. With the strengthening of people's environmental awareness, the amount of mercury added to the lamp must be strictly controlled. The amount of mercury in the lamp is too small, the effective life of the lamp is short, and the amount of mercury added to the lamp is too large, causing great pollution to the environment. It is difficul...

AI Technical Summary

Problems solved by technology

The wall temperature of low-pressure gas discharge lamps such as compact fluorescent lamps and germicidal lamps is higher than that of fluorescent lamps. At this temperature, the mercury vapor pressure of zinc amalgam is greater than 0.8Pa required for optimal efficiency, and the output efficiency of ultraviolet radiation with a wavelength of 253.7nm Low, so the luminous efficiency is low

Zinc-tin amalgam is used in compact fluorescent lamps. The photoelectric parameters are better than zinc amalgam. Mercury is continuously consumed in the lamp and needs to be replenished from the amalgam. Only a part of the mercury in the zinc-tin amalgam can be continuously released for replenishment. A part remains in the alloy and cannot be released, and the efficiency of mercury is low