Silver tin mercury alloy particle and preparation technology thereof

A preparation process, amalgam technology, applied in coating and other directions, can solve problems such as increasing the difficulty and complexity of the process, affecting the purity of the amalgam, affecting the quality of the amalgam, achieving accurate and reliable mercury content, eliminating secondary pollution, shortening The effect of the production cycle

Inactive Publication Date: 2015-03-18
上海亚尔精密零件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the sphere cooling stage, oil is generally used as the cooling medium, and it is a direct cooling method in which the sphere is injected into the cooling medium; this method is slow to cool and takes a long time; solid particles will be dispersed and floated in the medium during the preparation process, affecting the amalgam its own purity
In addition, after the sphere is condensed, it must be degreased when it is taken out of the medium, which increases the difficulty and complexity of the process, and incomplete degreasing will also affect the quality of the amalgam, which in turn will affect the subsequent lamp making.

Method used

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  • Silver tin mercury alloy particle and preparation technology thereof
  • Silver tin mercury alloy particle and preparation technology thereof
  • Silver tin mercury alloy particle and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The silver-tin amalgam is mixed according to the weight ratio Ag:Sn:Hg=2:48:50 to prepare silver-tin amalgam particles with an average weight of 1.5 mg.

[0055] The preparation method of silver-tin amalgam particles:

[0056] 1) Under an argon atmosphere, add raw materials: 0.2Kg of silver powder, 4.8Kg of tin particles and 5Kg of liquid mercury into a closed container, heat up to 380°C to melt the raw materials, and mix under a pressure of 20psi for 1.5 hours until the mixture is uniform The alloy solution is obtained; in an inert gas atmosphere, by applying pressure, the pressure is controlled at 55psi, the alloy solution is pressed out, and the alloy liquid droplets are formed through the vibrating nozzle, and the frequency and amplitude are controlled at 600Hz and 0.3mm respectively, and the alloy solution is made into an alloy Liquid droplets, the diameter of alloy droplets is 0.65-0.75mm;

[0057] 2) indirectly cooling the inert gas flow with liquid nitrogen, an...

Embodiment 2

[0067] The silver-tin amalgam is proportioned by weight Ag:Sn:Hg=6:40:54 to prepare silver-tin amalgam particles with an average weight of 3 mg.

[0068] The preparation method of silver-tin amalgam particles:

[0069] 1) Under an argon atmosphere, add raw materials: 0.6Kg of silver powder, 4Kg of tin particles and 5.4Kg of liquid mercury into a closed container, heat up to 350°C to melt the raw materials, and mix under a pressure of 20psi for 1.5 hours until uniform The alloy solution is obtained; in an inert gas atmosphere, by applying pressure, the pressure is controlled at 55psi, the alloy solution is pressed out, and the alloy liquid droplets are formed through the vibrating nozzle, and the frequency and amplitude are controlled at 600Hz and 0.3mm respectively, and the alloy solution is made into an alloy Liquid droplets, the diameter of the alloy droplets is 0.8-0.9mm;

[0070] 2) indirectly cooling the inert gas flow with liquid nitrogen, and condensing the alloy dropl...

Embodiment 3

[0079] The preparation process is the same as that of the comparative example, except that the condensation temperature used is -140°C.

[0080] The following tests were carried out on the amalgam dripped at these three temperatures:

[0081] Forming condition: the amalgam may fall to the bottom and condense into large pieces due to insufficient coldness of the amalgam;

[0082] Degree of sticking: If the formed amalgam is very sticky, it will affect the subsequent powder coating and screening process, resulting in complicated powder coating and screening failure, and it may even affect the smooth infusion of amalgam for lamp manufacturers.

[0083] Mercury release characteristics: The speed of mercury release determines the time for the amalgam fluorescent lamp to reach the standard luminous flux within the specified time. The mercury is released quickly, and the luminous flux of the lamp rises quickly, which reflects the user experience of the end consumer. The test method ...

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Abstract

The invention relates to a silver tin mercury alloy particle and a preparation technology thereof. A silver tin amalgam of a spherical structure, formed by silver tin mercury alloy, is arranged in the silver tin mercury alloy particle. A silver layer coats the outer surface of the spherical structure. The silver tin mercury alloy is prepared from below constituents of 0.5-10wt% of silver, 29.5-75wt% of tin and 15-70wt% of mercury. The preparation technology of the silver tin mercury alloy particle includes steps: adding raw materials in a sealed container and then heating the raw materials so as to fuse the raw materials under inert gas atmosphere, and evenly mixing the raw materials so as to obtain an alloy solution; manufacturing the alloy solution into alloy liquid drops 0.5-2mm in diameter under the inert gas atmosphere, and using inert gas currents to condense the alloy liquid drops under temperature of 100-190 degree centigrade below zero so as to obtain a silver tin amalgam molded body; finally, placing the silver tin amalgam molded body under temperature of 0-25 degree centigrade, and coating the silver tin amalgam molded body with silver powder so as to obtain the silver tin mercury alloy particle. Compared with the prior art, the silver tin mercury alloy particle has the advantages of being low in adhesion degree, excellent in amalgam release characteristic and the like.

Description

technical field [0001] The invention relates to a low-temperature solid amalgam particle and a preparation method thereof, in particular to a silver-tin amalgam particle and a preparation process thereof. Background technique [0002] Mercury is an indispensable working substance in fluorescent lamps. A lot of practice has shown that: only when mercury releases ultraviolet rays of a specific wavelength of 253.7nm, fluorescent lamps can obtain the highest luminous efficiency, and the optimum vapor pressure value for obtaining ultraviolet rays is Ph=0.8 Pa. As the temperature increases, the mercury vapor pressure also increases, and more UV radiation is self-absorbed by the mercury, thereby reducing lamp efficacy and reducing light output. [0003] The traditional fluorescent lamp manufacturing process is to introduce liquid mercury. Since the amount of mercury cannot be accurately controlled when injecting liquid mercury, the mercury content in the lamp is too much. cause m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/02B22F9/08
Inventor 盛誉顾峰毅邵俊
Owner 上海亚尔精密零件制造有限公司
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