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A kind of environment-friendly water-soluble cathode electron emission slurry and preparation method thereof

A cathode electron emission and electron emission technology, applied in the direction of circuits, discharge lamps, electrical components, etc., can solve the problem of reducing the electron emission performance and life of lamp tubes, hidden dangers in the production and transportation of electronic powder paste, and diluents are difficult to achieve Timely quantification and other issues, to achieve the effect of stable density, less impurities, and avoid waste of resources

Inactive Publication Date: 2015-08-19
南京双鹿电光源材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, butyl acetate has the characteristics of being extremely volatile, toxic and harmful, flammable and explosive. Its density is 0.8807, and its ignition point is 421°C (closed) 27°C. It is a secondary flammable liquid and can inhibit the central nervous system of the human body. It has a strong stimulating effect on the upper respiratory tract of the human body, which not only brings safety hazards to the production and transportation of electronic powder paste, but also pollutes the environment
At the same time, due to the volatilization of the ethyl acetate solvent, the density of the electronic powder paste has changed, which in turn causes the powdering amount of the filament to be inconsistent, and too much or too little powdering amount will lead to carbonation of the electronic powder paste when it is heated and decomposed. Incomplete or excessive salt decomposition, insufficient decomposition of carbonate will make the lamp tube turn yellow and black, and excessive decomposition of carbonate will affect its activity, resulting in poor emission performance of the electronic powder, and finally reducing the electron emission of the lamp tube Performance and its lifespan seriously affect the quality of the lamp
In order to avoid the density change of the electronic powder slurry caused by the volatilization of butyl acetate, operators need to add butyl acetate to dilute it from time to time, but this method cannot fundamentally solve the problem, and many operators have difficulty adding diluent timely quantification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 10.4 kg of powdered barium carbonate, 8.3 kg of strontium carbonate, and 2.1 kg of calcium carbonate and add them into the reaction kettle and mix them evenly to obtain 20.8 kg of ternary carbonate electronic powder. 20.8 kg of electronic powder, 10 kg of water, 3.328 kg of polyvinyl alcohol, 0.832 kg of polysorbate (using Tween-20), 0.832 kg of organosiloxane, 2.1 kg of zirconium dioxide, and 0.832 kg of nonylphenol polyoxyethylene ether kg, 0.832 kg of polyethylene glycol, and 0.832 kg of nano-alumina powder are mixed in a ball mill tank, the ball mill is controlled at a speed of 130 rpm, and ball milled for 96 hours, then sieved through 200 meshes to obtain a water-soluble electron emission slurry. The life test results of the filament A coated with the electronic paste are shown in Table 1.

Embodiment 2

[0026] Take 14 kg of powdered barium carbonate, 8.5 kg of strontium carbonate, and 2.5 kg of calcium carbonate and add them into the reaction kettle, and mix them uniformly to obtain 25 kg of ternary carbonate electronic powder. Mix 25 kg of electronic powder, 8.32 kg of water, 2.1 kg of hydroxypropyl cellulose, 0.416 kg of polyoxyethylene lauryl ether (using Maize-45), 0.416 kg of polyether, and 1.248 kg of zirconium dioxide in a ball mill, The speed of the ball mill was controlled at 100 rpm, the ball milled for 72 hours, and then sieved through 200 meshes to obtain a water-soluble electron emission slurry. The life test results of the filament B coated with the electronic slurry are shown in Table 1.

Embodiment 3

[0028] Take 8.91 kilograms of powdered barium carbonate, 5.61 kilograms of strontium carbonate, and 1.98 kilograms of calcium carbonate and add them into the reaction kettle, and mix them uniformly to obtain 16.5 kilograms of ternary carbonate electronic powder. Mix 16.5 kg of electronic powder, 7.5 kg of water, 2.1 kg of polyoxyethylene ether, 0.25 kg of polysorbate (using Tween-40), 0.2 kg of polyoxyethylene lauryl ether (using Maize-30), and contact with silicon and ether. 0.45 kg of sticks, 1.2 kg of zirconium dioxide, 0.3 kg of nonylphenol polyoxyethylene ether, 0.3 kg of ammonium polycarboxylate, and 0.3 kg of nano-alumina powder are mixed in a ball milling tank, the ball milling speed is controlled at 160 rpm, and ball milling is performed for 80 hours , and then sieved through 200 meshes to obtain a water-soluble electron emission slurry. The life test results of the filament C coated with the electronic powder slurry are shown in Table 1.

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Abstract

The invention relates to environment-friendly water-soluble cathode electron emission slurry, and also simultaneously relates to a preparation method of the environment-friendly water-soluble cathode electron emission slurry. The environment-friendly water-soluble cathode electron emission slurry is prepared from the materials by weight: 50-60% of electronic powders; 20-30% of water, 5-8% of water-soluble binder, 1-2% of hydrophilc agent, 1-2% of defoamer, 3-5% of activating agent, 0-2% of wetting agent, 0-2% of dispersing agent and 0-2% of curing agent. The environment-friendly water-soluble cathode electron emission slurry has the beneficial effects that the environment-friendly water-soluble cathode electron emission slurry is good in stability performance, economical and environment-friendly, excellent in performance, less in impurity and suitable for large-scale production and use; and the emission property of electron and the quality of a lamp tube are improved, and the service life of the lamp tube is prolonged.

Description

technical field [0001] The invention relates to an environment-friendly water-soluble cathode electron emission slurry and a preparation method thereof, belonging to the technical field of electronic materials. Background technique [0002] Cathode electron emission paste, also known as electron powder paste, is an electron emission material that adheres to the filament of a fluorescent lamp and is used to prepare cathode components for a low-pressure discharge lamp. It is one of the important components of a fluorescent lamp. The base material of the electronic powder paste is a cathode carbonate of a solid phase powder. The cathode carbonate is also called electronic powder, which can be heated and decomposed into cathode oxides in the lamp tube. The cathode electrons generated by the cathode oxides are Move and collide with the positive ions generated by mercury vapor, thereby generating 253.7nm ultraviolet rays, which excite the fluorescent powder in the lamp tube to ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/067
Inventor 成祥源
Owner 南京双鹿电光源材料有限公司
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