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A kind of preparation method of low melting point fluorescent glass

A technology of low-melting-point glass and fluorescent glass, which is applied in the field of preparation of low-melting-point fluorescent glass, can solve problems such as difficulty in commercialization, high firing temperature, and high cost, and achieve low raw material prices, low production energy consumption, and low cost. Effect

Active Publication Date: 2020-04-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, low-melting glasses have focused on TeO 2 Research on Glass System (Lin, Z., et al., A chromatography-tunable garnet-based phosphor-in-glass color converter applicable in w-LED. Journal of the European Ceramic Society, 2016. 36(7): p. 1723 -1729.; Lin, Z., et al., Highly thermal-stable warm w-LED based on Ce:YAG PiG stacked with ared phosphor layer. Journal of Alloys and Compounds, 2015. 649: p. 661-665.) , but TeO 2 The cost of fluorescent glass is too high to be commercialized. However, other glass systems have high firing temperatures, which do not meet the low-carbon life advocated by the contemporary era. Therefore, it is necessary to develop a fluorescent glass that can reduce the temperature of fired fluorescent glass and reduce production costs. glass preparation method

Method used

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  • A kind of preparation method of low melting point fluorescent glass
  • A kind of preparation method of low melting point fluorescent glass
  • A kind of preparation method of low melting point fluorescent glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of low melting point raw glass:

[0022] Weigh the low melting point glass component 14% (NaPO 3 ) 6 -44%NaF-3%CaO-35%B 2 o 3 -2%Sb 2 o 3 -2%Li 2 O (both are mole fractions), and then put the weighed components into a mortar and grind them evenly for 30 minutes. After grinding, put them into a cleaned alumina crucible and place Sintering in the furnace, the sintering process is from room temperature to 200°C, the heating time is 30min, at 200°C for 20min, then 130min to 750°C and holding for 30min, finally take it out at 750°C and pour it into the mold for rapid cooling to form the original Glass block, you can get low melting point glass.

[0023] (2) Preparation of fluorescent glass:

[0024] Crush the fired low-melting-point raw glass into the required glass powder, and grind it with 0.4g of commercial yttrium-aluminum-garnet-structured yellow phosphor (Ce:YAG) through a mortar, and dry it after grinding for 30 minutes spare. Take the mixed ...

Embodiment 2

[0026] (1) Preparation of low melting point raw glass:

[0027] Weigh the low melting point glass component 11% (NaPO 3 ) 6 -35%NaF-6%CaO-37%B 2 o 3 -3%Sb 2 o 3 -2%Li 2 O-6%ZnO (both are mole fractions), put the weighed components into the mortar and grind them evenly for 40 minutes, put them into a cleaned alumina crucible after grinding, and Put it in a muffle furnace for sintering. The sintering process takes 30 minutes from room temperature to 200°C, heats it at 200°C for 10 minutes, then takes 120 minutes to reach 750°C and holds it for 30 minutes, and finally takes it out at 750°C and pours it into the mold. The low melting point glass can be obtained by rapid cooling to form the original glass block.

[0028] (2) Preparation of fluorescent glass:

[0029]Crush the fired low-melting point raw glass into the required glass powder, and grind it with 0.3g of commercial yttrium aluminum garnet structure yellow phosphor (Ce:YAG) through a mortar, and dry it after grin...

Embodiment 3

[0031] (1) Preparation of low melting point raw glass:

[0032] Weigh the low melting point glass component 15% (NaPO 3 ) 6 -38%NaF-4%CaO-35%B 2 o 3 -3%Sb 2 o 3 -2%Li 2 O-3% ZnO (both are mole fractions), and then put the weighed components into the mortar and grind them evenly for 35 minutes. After grinding, put them into a cleaned alumina crucible, and Put it in a muffle furnace for sintering. The sintering process takes 35 minutes from room temperature to 200°C, heats it at 200°C for 15 minutes, takes 140 minutes to reach 750°C and holds it for 20 minutes, and finally takes it out at 750°C and pours it into the mold. The low melting point glass can be obtained by rapid cooling to form the original glass block.

[0033] (2) Preparation of fluorescent glass:

[0034] Crush the fired low-melting point raw glass into the required glass powder, and grind it with 0.2g of commercial yttrium aluminum garnet structure yellow phosphor (Ce:YAG) through a mortar, and dry it aft...

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Abstract

The invention discloses a preparation method of low-melting-point fluorescent glass and belongs to the field of preparation of glass materials. The preparation method is characterized in that the (NaPO3)6-NaF-CaO-B2O3-Sb2O3-Li2O-ZnO low-melting-point fluorescent glass is provided through the optimized design of the glass components, and the specific preparation steps are provided as follows: (1) firstly preparing the low-melting-point bare glass; (2) then mixing a commercial yttrium aluminium garnet structure yellow fluorescent powder and the low-melting-point glass powder in an alumina crucible, and firing and forming. The cost of the provided components for preparing the fluorescent glass is low, the operation process is simple and effective, the heat resisting property and the machiningproperty are excellent, the energy consumption in the production is low, the chemical stability is excellent, a solution is provided for solving the problems of a high-power LED device like light attenuation and color temperature drifting, and the limitations of the traditional fluorescent powder are expected to be broken.

Description

technical field [0001] The invention belongs to the technical field of glass material preparation, in particular to a method for preparing low-melting fluorescent glass. Background technique [0002] With the continuous research and development of white LEDs, their luminous efficiency and optical properties have been continuously improved, making white LEDs a new type of all-solid-state lighting source. At present, most white LEDs are mainly made of traditional phosphors such as commercial yttrium aluminum garnet structure yellow phosphors (Ce: YAG) and silica gel or epoxy resin coated on the LED chip, but the silica gel will age after long-term use. The attenuation of luminous intensity of phosphor powder is manifested as light color deviation and color deterioration, which affects the life of LED devices. At present, combining phosphor powder and glass to form phosphor glass is the best choice to solve traditional LED packaging. Compared with the existing epoxy resin-enc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C6/08C03C4/12C03C1/04
CPCC03C1/00C03C1/04C03C4/12
Inventor 刘泉林徐健宋振夏志国
Owner UNIV OF SCI & TECH BEIJING
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