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Nucleus-shell cathode emission material for fluorescent tube and its making method

A cathode emission and fluorescent lamp technology, applied in the manufacture of thermionic cathodes, solid thermionic cathodes of discharge tubes, main electrodes of discharge tubes, etc., can solve the problem of large outgassing, poor coating strength, poor anti-poisoning ability and anti-ion bombardment ability and other issues to achieve the effect of improving manufacturing process, improving product quality and convenient operation

Inactive Publication Date: 2010-06-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the ternary carbonate emission material has disadvantages such as small DC emission, poor coating strength, poor anti-poisoning ability and anti-ion bombardment ability, and large outgassing during decomposition and activation.
These shortcomings are particularly prominent in compact energy-saving fluorescent lamps, which directly affect product quality, luminous efficiency and service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the proportion (mass ratio) is Ba(NO 3 ) 2 :Sr(NO 3 ) 2 :Ca(NO 3 ) 2 =56:34:10 prepare total concentration 1.0mol / L nitrate aqueous solution; Make (NH 4 ) 2 CO 3 Aqueous solution with a concentration of 1.0 mol / L; the two materials are fed into the reactor in parallel, and stirred at 60°C for 3.0 hours to react and precipitate to obtain co-precipitated crystals; filter and wash. Nascent (BaSrCa)CO 3 Ternary carbonate with a central particle size of 6.4 μm.

Embodiment 2

[0041] Cerium chloride is mixed with 0.5mol / L solution; Get the (BaSrCa)CO that quantitative embodiment 1 obtains 3 , according to the liquid-solid (wet) ratio of 10 into the cerium chloride solution, stirred at 80 ° C for 2.0 hours; filtered, washed to Ag + Check for Cl - ; Drying at 80°C; the finished product was obtained.

[0042] Compared with commercially available products, the 200-hour average light decay of the manufactured 2U-11W compact fluorescent lamp is reduced by 61.1%, and the average life span is increased by 21.6%.

Embodiment 3

[0044] Yttrium chloride is mixed with 1.5mol / L solution; Get the (BaSrCa)CO that quantitative embodiment 1 obtains 3 , according to the liquid-solid (wet) ratio of 5 into the yttrium chloride solution, stirred at 65 ° C for 0.5 hours; filtered, washed to Ag + Check for Cl - ; 90 ° C drying; in the finished product.

[0045] Compared with commercially available products, the 200-hour average light decay of the manufactured 2U-11W compact fluorescent lamp is reduced by 47.3%, and the average life span is increased by 16.7%.

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Abstract

The invention discloses a core-case cathode transmitting material of fluorescent lamp, which is characterized by the following: adopting (BaSrCa)CO3 powder as core and carbonic acid rare earth as casethrough solid powder method; setting the central grain size of core at 5-10um; increasing the using lift of fluorescent lamp and reducing the light decay of fluorescent lamp greatly; improving the product quality of the fluorescent lamp with little grain size for cathode transmitting material, large specific surface area and high activity.

Description

technical field [0001] The invention relates to a cathode emitting material for a fluorescent lamp and a preparation method thereof. Background technique [0002] Fluorescent lamps are gas discharge light sources and are currently the mainstream light source for lighting. The global annual production and sales exceed 10 billion. Compact energy-saving fluorescent lamps are the main light source of global green lighting, and their manufacturing process is becoming more and more mature [1]; at present, the improvement of product quality depends on the improvement of the performance of its production raw materials (such as phosphor powder, cathode emission materials, etc.). [0003] The cathode is an important part of the gas discharge light source, which has a decisive influence on the performance (especially the life) of the gas discharge light source. It can be said that most of the damage of the gas discharge light source is caused by the deterioration or failure of the cath...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J9/04H01J1/14H01J61/06
Inventor 胡启阳李新海王志兴郭华军
Owner CENT SOUTH UNIV
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