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A preparation method of remote fluorescent sheet based on low melting point borosilicate glass powder

A borosilicate glass, borosilicate technology, applied in the field of materials science, can solve the problems of organic glue aging, uneven coating of phosphor powder, yellowing, etc., and achieves not easy to fall off, high practical value, and low cost. Effect

Active Publication Date: 2020-02-18
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing a remote fluorescent sheet based on low-melting borosilicate glass powder, said remote fluorescent film based on low-melting borosilicate glass powder The film needs to solve technical problems such as uneven phosphor coating, organic glue aging and yellowing in the prior art

Method used

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  • A preparation method of remote fluorescent sheet based on low melting point borosilicate glass powder
  • A preparation method of remote fluorescent sheet based on low melting point borosilicate glass powder
  • A preparation method of remote fluorescent sheet based on low melting point borosilicate glass powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) SiO to be weighed 2 , B 2 O 3 , ZnO, Na 2 CO 3 The mass percentages of the raw materials are: 15%, 44%, 21%, 20%, mixed uniformly, prepared glass blocks by the melting method, and ground into powders with a particle size of 5 to 13 μm;

[0024] 2) Weigh 20 parts by mass and 5 parts of glass powder and phosphor powder, disperse the powder in an organic substance with a mass ratio of 45 parts, and mix them uniformly to form a fluorescent glass paste;

[0025] 3) Coat the fluorescent glass slurry prepared in 2) on the ultra-white glass plate with a blade coating technique;

[0026] 4) The fluorescent glass layer prepared in 3) is fully sintered at 180°C to 300°C to completely volatilize the organic matter, and then sintered at a low temperature of 600°C to 700°C for 5 to 30 minutes to obtain the remote fluorescent glass sheet.

[0027] by figure 2 It can be seen that under the excitation wavelength of 460nm, the fluorescent glass sheet appears Ce at 550nm 3+ The characteristic ...

Embodiment 2

[0029] 1) SiO to be weighed 2 , B 2 O 3 , ZnO, Na 2 CO 3 The mass percentages of the raw materials are: 18.5%, 45%, 20.5%, 16%, mixed evenly, prepared glass blocks by the melting method, and ground into powders with a particle size of 5-13μm;

[0030] 2) Weigh 32 parts by mass and 6 parts of glass powder and phosphor powder, disperse the powder in 52 parts by mass of organic matter, and evenly mix it into a fluorescent glass paste;

[0031] 3) Coating the fluorescent glass slurry prepared in 2) on the ultra-white glass plate by spin coating technology;

[0032] 4) The fluorescent glass layer prepared in 3) is fully sintered at 180°C to 300°C to completely volatilize the organic matter, and then sintered at a low temperature of 600°C to 700°C for 5 to 30 minutes to obtain the remote fluorescent glass sheet.

Embodiment 3

[0034] 1) SiO to be weighed 2 , B 2 O 3 , ZnO, Na 2 CO 3 The mass percentages of the raw materials are: 20.5%, 44.8%, 21.2%, 13.5%, mixed uniformly, prepared glass blocks by melting method, and ground into powder with a particle size of 5-13μm;

[0035] 2) Weigh 48 parts by mass and 9 parts of glass powder and phosphor powder, disperse the powder in 67 parts by mass of organic matter, and evenly mix it into a fluorescent glass paste;

[0036] 3) Coating the fluorescent glass paste prepared in 2) on the ultra-white glass plate by screen printing technology;

[0037] 4) The fluorescent glass layer prepared in 3) is fully sintered at 180°C to 300°C to completely volatilize the organic matter, and then sintered at 600°C to 700°C for 5 to 30 minutes to obtain the remote fluorescent glass sheet

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Abstract

The invention provides low-melting-point borosilicate glass powder. The glass powder is prepared from, by mass, 10-22% of SiO2, 37-45% of B2O3, 14-22% of ZnO and 13-20% of Na2CO3. The invention further provides a remote fluorescent sheet based on the low-melting-point borosilicate glass powder. A preparing method comprises the steps of preparing the low-melting-point borosilicate glass powder; preparing fluorescent glass slurry, wherein the glass powder and fluorescent powder are mixed and are then dispersed into organic matter, and the materials are uniformly mixed into the fluorescent glassslurry; preparing the fluorescent glass sheet, wherein firstly a scraping / spinning / silk-screen printing technology is utilized to coat a super white glass plate with the fluorescent glass slurry to form a layer of uniform fluorescent glass coating, and then sintering and cooling are conducted under low temperature to obtain the fluorescent glass sheet. The chemical performance and optical performance of the fluorescent glass sheet prepared according to the method are good, and the fluorescent glass sheet can be applied to the fields of semiconductor illumination and laser illumination.

Description

Technical field [0001] The invention belongs to the field of materials science, and relates to a luminescent material, in particular to a method for preparing a remote fluorescent sheet based on low-melting borosilicate glass powder. Background technique [0002] As a lighting source, LED lighting has the advantages of small size, fast response speed, safe low voltage, good weather resistance, and good directionality. It has a wide range of applications in special industries such as oil fields, petrochemicals, railways, mining, military, and special work lamps. prospect. At present, the commonly used packaging method for commercial white light LEDs is to directly contact the phosphor with the blue chip by spot application, which has a great hindrance to heat dissipation, and the performance of the packaging material (epoxy resin) is caused by the heat release of high-power LEDs for a long time. Decrease, reduce LED luminous efficiency. In addition, the spot coating method is di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/04C03C4/12C03C12/00C03C3/066H01L33/50
CPCC03C3/066C03C4/12C03C12/00C03C17/04C03C2218/114C03C2218/116C03C2218/119H01L33/501H01L33/505H01L33/507H01L2933/0041
Inventor 赵国营徐玲芝金文田陈雪筠莫月平孟少华张蔓琳房永征刘玉峰侯京山
Owner SHANGHAI INST OF TECH
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