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Method for preparing green fluorescent powder for VFD (Vacuum Fluorescent Display)

A green fluorescent powder and manufacturing method technology, applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., can solve problems such as complex operation, high risk of mixed atmosphere reaction, poor product stability, etc., and achieve quality stability Improve, avoid quality differences, and ensure stability

Inactive Publication Date: 2014-12-10
WUHE TONGSHIFU FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the N existing in the prior art 2 -H 2 Due to the defects of high risk of mixed atmosphere reaction, complicated operation, and poor product stability, the present invention provides a method for manufacturing green fluorescent powder for vacuum fluorescent displays with simple process, high product luminous brightness, and strong process adaptability.

Method used

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  • Method for preparing green fluorescent powder for VFD (Vacuum Fluorescent Display)
  • Method for preparing green fluorescent powder for VFD (Vacuum Fluorescent Display)
  • Method for preparing green fluorescent powder for VFD (Vacuum Fluorescent Display)

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Effect test

Embodiment 1

[0024] A kind of manufacturing method of green phosphor powder for vacuum fluorescent display of this embodiment, combines figure 1 , mainly consists of the following steps:

[0025] (1) Ingredients: Weigh 1kg of zinc oxide, 15g of zinc sulfide, and 5g of sulfur, mix them; adjust to paste with absolute ethanol, put them into a ball mill for mixing and grinding, dry at 80°C, and sieve through a 200-mesh nylon sieve to obtain Raw material.

[0026] (2) Pre-burning: put the prepared raw material into a quartz crucible, make it slightly solid, and evenly cover the surface with a layer of zinc sulfide to isolate the air, cover the crucible tightly with a quartz cover, and keep it warm at 500°C for 60 minutes; After cooling, remove the zinc sulfide layer on the surface, and sieve the lower layer powder with 200 mesh to obtain pre-fired powder.

[0027] (3) Prepare atmosphere material: weigh aluminum chloride hexahydrate (AlCl 3 .6H 2 O) 7g, sodium chloride (NaCl) 1.5g, aluminum ...

Embodiment 2

[0036] A kind of manufacturing method of green phosphor powder for vacuum fluorescent display of this embodiment, combines figure 1 , mainly consists of the following steps:

[0037] (1) Ingredients: Weigh 1kg of zinc oxide and 15g of sulfur, mix them; adjust to a paste with absolute ethanol, put them into a ball mill for mixing and grinding, dry at 80°C, and sieve through a 200-mesh nylon sieve to obtain raw meal.

[0038] (2) Pre-burning: put the prepared raw material into a quartz crucible, make it slightly solid, and evenly cover the surface with a layer of zinc sulfide to isolate the air, cover the crucible tightly with a quartz cover, and keep it warm at 650°C for 30 minutes; After cooling, remove the zinc sulfide layer on the surface, and sieve the lower layer powder with 200 mesh to obtain pre-fired powder.

[0039] (3) Prepare atmosphere material: weigh aluminum chloride hexahydrate (AlCl 3 .6H 2 O) 6g, sodium chloride (NaCl) 1.0g, aluminum sulfate octadecahydrate ...

Embodiment 3

[0048] A kind of manufacturing method of green phosphor powder for vacuum fluorescent display of this embodiment, combines figure 1 , mainly consists of the following steps:

[0049] (1) Ingredients: Weigh 1 kg of zinc oxide and 25 g of zinc sulfide, mix them; use absolute ethanol to make a paste, put them into a ball mill for mixing and grinding, dry at 80°C, and sieve through a 200-mesh nylon screen to obtain raw meal.

[0050] (2) Pre-burning: put the prepared raw materials into a quartz crucible, make it slightly solid, and evenly cover the surface with a layer of zinc sulfide to isolate the air, cover the crucible tightly with a quartz cover, and keep it warm at 600°C for 60 minutes; After cooling, remove the zinc sulfide layer on the surface, and sieve the lower layer powder with 200 mesh to obtain pre-fired powder.

[0051] (3) Prepare atmosphere material: weigh aluminum chloride hexahydrate (AlCl 3 .6H 2 O) 8.5g, aluminum sulfate octadecahydrate (Al 2 (SO 4 ) 3 ....

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Abstract

The invention relates to a method for preparing green fluorescent powder for a VFD (Vacuum Fluorescent Display) and belongs to the technical field of preparation of fluorescent powder. The method comprises the following steps: by taking zinc oxide, zinc sulfide and sulfur as raw materials, blending the raw materials into a paste, grinding, drying, screening, isolating air and presintering, thereby obtaining presintered powder; by taking zinc sulfide or sulfur as an atmosphere material, performing laminated burning on the presintered powder, performing powder concentration and immersion cleaning based on absolute ethyl alcohol on the burnt powder, adding pure water, mixing and stirring, adding a stock solution of potassium silicate, performing surface coating treatment, dehydrating, drying and screening, thereby obtaining a finished product. The preparation method disclosed by the invention has the advantages of simple process, simple equipment, preparation safety and the like, and the prepared green fluorescent powder for the VFD has the characteristics of high brightness, uniform particle size, narrow particle size distribution and the like.

Description

technical field [0001] The invention relates to a method for manufacturing green fluorescent powder for a vacuum fluorescent display, and belongs to the technical field of fluorescent powder manufacturing. Background technique [0002] VFD phosphors are usually called low-speed electron excitation phosphors or low-voltage phosphors, and practical brightness can be obtained with an acceleration voltage below 100eV. Unlike high-voltage excitation such as a picture tube, the penetration depth of the electron beam is often only a few nanometers. In this way, due to the small transmission ability of the electron beam, the metal back treatment like the picture tube is not used, and the resistance of the phosphor matrix must be reduced to prevent the secondary electron emission from being excited in the field below 1 and cause charging, and reduce the excitation and luminescence initiation voltage. . Phosphor powder for VFD is different from phosphor powder for CRT, and must meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/54C09K11/02H01L33/50
Inventor 赵捷鲁国兴赵刚律
Owner WUHE TONGSHIFU FOOD
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