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Preparation method of eu2o3-dy2o3 double-doped zinc borosilicate glass-ceramics

A glass-ceramic, zinc borosilicate technology, applied in the field of LED luminescent materials, can solve the problems of easy aging, poor luminous stability, etc., and achieve the effects of pure luminosity, stable physical and chemical properties, and wide application.

Inactive Publication Date: 2015-12-23
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, white light LEDs mainly use the method of covering yellow phosphor powder with blue LED chips. This technical method has disadvantages such as poor luminous stability and easy aging.

Method used

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  • Preparation method of eu2o3-dy2o3 double-doped zinc borosilicate glass-ceramics
  • Preparation method of eu2o3-dy2o3 double-doped zinc borosilicate glass-ceramics
  • Preparation method of eu2o3-dy2o3 double-doped zinc borosilicate glass-ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 7.40 g of zinc oxide, 11.84 g of boric acid, 20.35 g of silicon dioxide, 3.7 g of aluminum oxide, 1.85 g of sodium carbonate, 1.85 g of titanium dioxide, and 1.10 g of europium oxide.

[0033] Grind the above raw materials with a mortar to obtain a uniform powder. Put the ground raw material into a corundum crucible, put it in a resistance furnace, and melt it at a temperature of 1500°C, then pour the molten raw material into glass, then put it into a muffle furnace, and nucleate it at 600°C 2h, crystallized at 770°C for 6h, and finally obtained the luminescent glass-ceramics under this composition.

[0034] like figure 1 As shown, it presents orange-red light under the excitation of ultraviolet light at 391nm, and the glass sample has five emission bands: at 441nm, it belongs to Eu 2+ ion 4f 6 5d → 4f 7 transition, and a relative strength of 2695. Located at 592nm attributed to Eu 3+ Ionic 5 D. 0 → 7 f1 transition, and a relative strength of 2545. Locat...

Embodiment 2

[0036] Weigh 9.25g of zinc oxide, 12.95g of boric acid, 13.32g of silicon dioxide, 5.55g of aluminum oxide, 2.59g of sodium carbonate, 0.37g of titanium dioxide, and 1.20g of dysprosium trioxide.

[0037] Grind the above raw materials with a mortar to obtain a uniform powder. Put the ground raw material into a corundum crucible, put it in a resistance furnace, and melt it at a temperature of 1500°C, then pour the molten raw material into glass, then put it into a muffle furnace, and nucleate it at 600°C 2h, crystallized at 770°C for 6h, and finally obtained the luminescent glass-ceramics under this composition.

[0038] like figure 2 As shown, it presents yellow light under the excitation of 396nm ultraviolet light, and the glass sample mainly has two emission bands: the one at 484nm belongs to Dy 3+ Ionic 4 f 9 / 2 → 6 h 15 / 2 transition, and the relative intensity is 5544, which is assigned to Dy at 576nm 3+ Ionic 4 f 9 / 2 → 6 h 13 / 2 transition, and a relative streng...

Embodiment 3

[0040] Weigh 11.1 g of zinc oxide, 11.1 g of boric acid, 17.02 g of silicon dioxide, 1.85 g of aluminum oxide, 3.7 g of sodium carbonate, 1.11 g of titanium dioxide, 0.7 g of dysprosium trioxide, and 0.6 g of dieuropium trioxide.

[0041] Grind the above raw materials with a mortar to obtain a uniform powder. Put the ground raw material into a corundum crucible, put it in a resistance furnace, and melt it at a temperature of 1500°C, then pour the molten raw material into glass, then put it into a muffle furnace, and nucleate it at 600°C 2h, crystallized at 770°C for 6h, and finally obtained the luminescent glass-ceramics under this composition.

[0042] like image 3 As shown, it presents purple light under the excitation of ultraviolet light at 393nm, and the glass sample has seven emission bands: at 436nm, it belongs to Eu 2+ ion 4f 6 5d → 4f 7 The blue-green light of the transition, with a relative intensity of 2325, belongs to Dy at 483nm 3+ Ionic 4 f 9 / 2 → 6 h 15...

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Abstract

The invention discloses a method for preparing Eu2O3-Dy2O3 double-doped zinc-boron-silicate glass-ceramics. The preparation method uses zinc oxide, boric acid, silicon dioxide, aluminum oxide, sodium carbonate, titanium dioxide, Dysprosium and europium trioxide are used as raw materials. After grinding and mixing the above raw materials, they are melted and shaped at 1400-1500°C to form glass, and the formed glass is annealed at 500-600°C for 2-3 hours to eliminate internal Stress, cooled to room temperature; crystallize the annealed glass, nucleate at 550-650°C for 2-5 hours, crystallize at 750-800°C for 6-12 hours, and finally obtain zinc borosilicate Luminous glass-ceramic. The invention has a short production cycle and low cost, and the prepared luminescent glass-ceramic has the advantages of high luminous efficiency, high uniformity, long life, energy saving and environmental protection, etc., and is applied to LED lamps to reduce costs and improve luminous performance.

Description

technical field [0001] The present invention relates to a kind of Eu 2 o 3 -Dy 2 o 3 The invention discloses a method for preparing double-doped zinc borosilicate glass-ceramics, which belongs to the technical field of LED luminescent materials. Background technique [0002] Light-emitting diode (LED) is a semiconductor light-emitting device that can convert electrical energy into light energy, and is a solid-state light source. Light-emitting diodes (LEDs) have the advantages of fast response, long life, energy saving and environmental protection, and have attracted widespread attention. Compared with traditional lighting sources, LED lights have many obvious advantages: low heat generation, energy saving; high luminous efficiency; long service life; green and environmentally friendly; safe and reliable; small light source and fast response. Based on the above advantages, LED lights have been applied in many fields, not only for the interior lighting of automobiles, tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/14
Inventor 李梅王觅堂柳召刚胡艳宏岳朋王明
Owner INNER MONGOLIA UNIV OF SCI & TECH
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