Detection method for organic matter residue in phosphor slurry

A detection method and fluorescent powder technology, applied in the direction of color/spectral characteristic measurement, test sample preparation, etc., can solve the problems of large light attenuation and low light efficiency, and achieve the effect of ensuring product quality and prolonging service life

Inactive Publication Date: 2013-07-24
陕西彩虹新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a method for detecting the amount of residual organic matter in the phosphor powder slurry, which can effectively detect the amount of organic matter remaining in the phosphor powder slurry, thereby solving the problem of phosphor powder formulation. The problem of low luminous efficiency and large light decay after the slurry is made into fluorescent lamps prolongs the service life of fluorescent lamps and ensures product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Step 1: Mix 25g of alumina solution with a mass concentration of 2% with pure water and phosphor according to the mass ratio of 1:3:4 and stir evenly. The stirring speed is 900 rpm and the stirring time is 3h;

[0013] Step 2: Prepare a polyethylene oxide (PEO) solution with a mass concentration of 8%, the solution mass is 4 times the mass of the alumina solution, that is 100g, add it to the mixture obtained in step 1 and stir evenly, the stirring speed is 350 rpm , stirring time 2h, made into organic slurry;

[0014] Step 3: Weigh 40g of the organic slurry and place it in a 50ml ceramic crucible for roasting at a temperature of 150°C for 10 minutes, and then roast at 600°C for 30 minutes;

[0015] Step 4: After cooling to room temperature of 25°C, use a UV-2501 double-beam spectrophotometer to test the reflectivity of the slurry powder, and perform a comparison test on the powder body color of the fired slurry.

Embodiment 2

[0017] Step 1: Mix 35g of alumina solution with a mass concentration of 1%, pure water and phosphor according to the mass ratio of 1:3:4 and stir evenly, the stirring speed is 800 rpm, and the stirring time is 3h;

[0018] Step 2: Prepare a polyethylene oxide (PEO) solution with a mass concentration of 10%. The mass of the solution is 5 times the mass of the alumina solution, that is, 175g. Add it to the mixture obtained in step 1 and stir evenly at a stirring speed of 250 rpm , stirring time 2.5h, made into organic slurry;

[0019] Step 3: Weigh 40g of the organic slurry and place it in a 50ml ceramic crucible for roasting at a temperature of 150°C for 10 minutes, and then roast at 600°C for 30 minutes;

[0020] Step 4: After cooling to room temperature of 25°C, use a UV-2501 double-beam spectrophotometer to test the reflectivity of the slurry powder, and perform a comparison test on the powder body color of the fired slurry.

Embodiment 3

[0022] Step 1: Mix 50g of alumina solution with a mass concentration of 5%, pure water and phosphor according to the mass ratio of 1:3:4 and stir evenly, the stirring speed is 850 rpm, and the stirring time is 4h;

[0023] Step 2: Prepare a polyethylene oxide (PEO) solution with a mass concentration of 5%. The quality of the solution is 4.5 times that of the alumina solution, that is, 225g. Add it to the mixture obtained in step 1 and stir evenly. The stirring speed is 400 rpm. Stirring time 3h, made into organic slurry;

[0024] Step 3: Weigh 40g of the organic slurry and place it in a 50ml ceramic crucible for roasting at a temperature of 150°C for 10 minutes, and then roast at 600°C for 30 minutes;

[0025] Step 4: After cooling to room temperature of 25°C, use a UV-2501 double-beam spectrophotometer to test the reflectivity of the slurry powder, and perform a comparison test on the powder body color of the fired slurry.

[0026] Two implementation example effect verificat...

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Abstract

The invention relates to a detection method for organic matter residue in a phosphor slurry. According to the detection method, a certain concentration of an alumina solution, pure water and phosphor are mixed according to a certain ratio, and uniformly stirred, a prepared PEO solution is added to the obtained mixture, uniform stirring is performed to produce an organic slurry, the organic slurry is weighed and placed in a ceramic crucible to carry out baking, cooling is performed, an UV-2501 double light beam spectrophotometer is adopted to carry out a slurry powder reflectivity test, and a powder color comparison test on the baked slurry can be performed, such that an absorption performance of the slurry used in a fluorescent lamp production process on the organic matter can be judged, and the organic matter residue in the slurry can be determined according to the reflectivity of the slurry powder so as to solve problems of low light efficiency and high luminous decay of the fluorescent lamp prepared from the phosphor-prepared slurry, prolong a service life of the fluorescent lamp, and ensure product quality.

Description

technical field [0001] The invention relates to a method for detecting the characteristics of fluorescent powder slurry for energy-saving lamps, in particular to a method for detecting residual organic matter in the fluorescent powder slurry. Background technique [0002] At present, the powder test methods of fluorescent powder for energy-saving lamps are limited to the basic physical properties of the powder, such as luminous characteristics, particle size, and specific surface area. The test for application characteristics is mainly the electrical characteristic test after the manufacturer conducts the tube. Only pay attention to the viscosity and specific gravity of the slurry, but there are few studies on the characteristics of the phosphor in the slurry. If there is a lot of residual organic matter in the phosphor paste, it will not only affect the initial light efficiency of the fluorescent lamp, but also increase the light decay of the fluorescent lamp and shorten th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N1/38G01N1/44
Inventor 薛敏华张东宏
Owner 陕西彩虹新材料有限公司
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