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Europium-doped glass-ceramics containing feldspar phase and preparation method thereof

A technology of glass-ceramics and glass, which is applied in glass manufacturing equipment, glass molding, chemical instruments and methods, etc., and can solve the problems of harsh synthesis conditions and high cost

Active Publication Date: 2020-07-07
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Feldspar alkaline earth aluminosilicate has attracted much attention due to its good physical and chemical stability and high luminous efficiency. About Eu 2+ The reports of activated feldspar-type alkaline earth aluminosilicate phosphors are not uncommon, and the commonly used preparation methods include solid-phase method, Pechini sol-gel method and co-precipitation method (such as Opt. Mater, 34, 931, 2012; J. Mater. Chem. C, 2, 3951, 2014; J. Solid State Chem, 182, 1673, 2009), but most of them need 2 , N 2 / H 2 Or high-temperature calcination under CO strong reducing atmosphere, the synthesis conditions are harsh and the cost is high

Method used

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  • Europium-doped glass-ceramics containing feldspar phase and preparation method thereof
  • Europium-doped glass-ceramics containing feldspar phase and preparation method thereof
  • Europium-doped glass-ceramics containing feldspar phase and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of europium-doped glass-ceramic containing feldspar phase, the steps are:

[0032] (1) The oxide mole percentage corresponding to the basic glass composition is 49BaO–17.5SiO 2 –27B 2 o3 –5Al 2 o 3 –1TiO 2 –0.5Eu 2 o 3 , calculate and weigh analytically pure raw materials: barium carbonate, silicon dioxide, boric acid, aluminum oxide, titanium dioxide, europium oxide, and mix them uniformly to obtain a batch.

[0033] (2) Transfer the batch material in step (1) to a 50 ml corundum crucible, then put the corundum crucible into a silicon molybdenum rod high-temperature electric furnace at 1350 ° C, and keep it warm for 45 minutes under air atmosphere to fully melt the raw materials and obtain homogenization , clarified glass melt.

[0034] (3) The glass melt was cast in a mold, formed at 200°C, then placed in a muffle furnace for annealing at 480°C for 2 hours, and then cooled to room temperature with the furnace to obtain a basic glass doped w...

Embodiment 2

[0038] A preparation method of europium-doped glass-ceramic containing feldspar phase, the steps are:

[0039] (1) According to the molar percentage of oxides corresponding to the basic glass composition 19MgO–30BaO–17.5SiO 2 –27B 2 o 3 –5Al 2 o 3 –1TiO 2 –0.5Eu 2 o 3 , calculate and weigh analytically pure raw materials: magnesium hydroxide, barium carbonate, silicon dioxide, boric acid, aluminum oxide, titanium dioxide, europium oxide, and mix them uniformly to obtain a batch.

[0040] (2) Transfer the mixed batch materials to a 50 ml corundum crucible, then put the corundum crucible into a high-temperature silicon-molybdenum rod electric furnace at 1350 °C, and keep it warm for 45 minutes under air atmosphere to fully melt the raw materials and obtain homogenization. Clear glass melt.

[0041] (3) The glass melt was cast in a mold, formed at 200°C, then placed in a muffle furnace for annealing at 480°C for 2 hours, and then cooled to room temperature with the furnac...

Embodiment 3

[0045] A preparation method of europium-doped glass-ceramic containing feldspar phase, the steps are:

[0046] (1) The oxide mole percentage corresponding to the basic glass composition is 29MgO–20BaO–18.5SiO 2 –27B 2 o 3 –5Al 2 o 3 –0.5Eu 2 o 3 , calculate and weigh analytically pure raw materials respectively: magnesium hydroxide, barium carbonate, silicon dioxide, boric acid, aluminum oxide, europium oxide, and mix them uniformly to obtain a compounding material.

[0047] (2) Transfer the mixed batch materials to a 50 ml corundum crucible, then put the corundum crucible into a high-temperature silicon-molybdenum rod electric furnace at 1350 °C, and keep it warm for 45 minutes under air atmosphere to fully melt the raw materials and obtain homogenization. Clear glass melt.

[0048] (3) The glass melt was cast in a mold, formed at 200°C, then placed in a muffle furnace for annealing at 480°C for 2 hours, and then cooled to room temperature with the furnace to obtain a ...

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Abstract

The invention discloses an europium-doped glass ceramic containing a feldspar phase and a preparation method thereof. The oxide compositions of the base glass of the glass ceramic are expressed as, bymole percentage, 0-50 mol% of MgO, 5-50 mol% of BaO, 10-20 mol% of SiO2, 10-30 mol% of B2O3, 1-10 mol% of Al2O3, 0-5 mol% of TiO2 and 0.1-1 mol% of Eu2O3. The preparation method comprises the steps of firstly, adopting a traditional fusion-cooling method to prepare alkaline-earth borosilicate base glass, and then conducting smashing, fine grinding and screening on the base glass to obtain glass powder; secondly, compressing the glass powder into a circular sheet of a certain size, and conducting sintering on the circular sheet under certain temperature to obtain the glass ceramic. The principal crystalline phase of the europium-doped glass ceramic is hexagonal-phase baryta feldspar and can provide a great crystalline field environment for europium ions, and therefore the luminescence property is improved. Meanwhile, the glass ceramic also has the advantages same as a glass phase, such as high mechanical strength and great chemical stability. Since Eu3+ enters crystal lattices to substitute Ba2+ in an inequivalence mode, by adopting the preparation method of the glass ceramic, Eu2+ can be obtained in the air atmosphere without adding any reducing agent; moreover, the preparation method has the advantages of being low in cost, simple to operate, safe, effective, environmentally friendly and the like.

Description

technical field [0001] The invention relates to a rare earth-doped glass-ceramic, in particular to a europium-doped glass-ceramic containing a feldspar phase and a preparation method thereof. Background technique [0002] Europium ion doped, especially Eu 2+ Activated fluorescent materials have been widely concerned because of their broad application prospects in lighting, display and solar cells. Currently about Eu 2+ Most studies on spectral properties have focused on crystalline powder materials. Compared with the narrow-band emission of the f-f transition of trivalent europium ions, the d-f transition emission of divalent europium ions presents the characteristics of broadband, high intensity, and great influence of crystal field. By adjusting the crystal field strength of the host material, the Eu 2+ The emission wavelength can be effectively adjusted from the ultraviolet region to the red region. Feldspar alkaline earth aluminosilicate has attracted much attention...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03B19/06C09K11/80
Inventor 张维娟马亮芝丁振宇吴丽娟王成猛刘世权王志
Owner UNIV OF JINAN