Luminescent transparent glass containing europium ion self-reducing ability and preparation method thereof

A technology of luminescent glass and europium ions, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of reducing the light decay of phosphor powder, easy aging of epoxy resin, complicated packaging process, etc., and achieve uniform texture and reduction. The effect of high degree and simple production process

Active Publication Date: 2020-03-31
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing fluorescent powder coated LED chips have technical deficiencies such as poor color rendering, complex packaging process, and easy aging of epoxy resin used for packaging. Compared with glass, which has good chemical stability, rare earth doped luminescent glass is used to Substituting phosphor powder can greatly reduce the light decay of phosphor powder, and improve the luminous efficiency and lifespan of white LEDs

Method used

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  • Luminescent transparent glass containing europium ion self-reducing ability and preparation method thereof
  • Luminescent transparent glass containing europium ion self-reducing ability and preparation method thereof
  • Luminescent transparent glass containing europium ion self-reducing ability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0027] 1) Weigh the raw material BaCO according to the molar ratio of 1:1:1:0.01:y:0.05:0.28 (where y=0, 0.28, 0.55, 0.83) 3 , ZnO, SiO 2 , Eu 2 o 3 , H 3 BO 3 , NH 4 h 2 PO 4 , Na 2 SO 4 , the weighed raw materials were ground in an agate mortar for 30 minutes at room temperature, and mixed evenly to obtain a glass precursor for later use.

[0028] 2) Put the precursor in step 1) into a corundum crucible, put the precursor together with the crucible in a silicon-molybdenum furnace, keep it at 1400°C for 2 hours, and wait for it to melt and homogenize into glass liquid. After taking out the molten glass, pour it into a graphite mold to form it, then move it into a preheated resistance furnace, anneal at 600°C for 30 min, and naturally cool to room temperature with the furnace temperature to obtain the initial sample.

[0029] 3) Part of the initial sample obtained in step 2) was cut and polished, and part of it was ground into powder to test its luminescent propertie...

Embodiment example 2

[0032] 1) Weigh the raw material BaCO according to the molar ratio of 1:1:1:0.01:0.83:z:0.28 (where z=0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06) 3 , ZnO, SiO 2 , Eu 2 o 3 , H 3 BO 3 , NH 4 h 2 PO 4 , Na 2 SO 4 , the weighed raw materials were ground in an agate mortar for 30 minutes at room temperature, and mixed evenly to obtain a glass precursor for later use.

[0033] 2) Put the precursor in step 1) into a corundum crucible, put the precursor together with the crucible in a silicon-molybdenum furnace, keep it at 1400°C for 2 hours, and wait for it to melt and homogenize into glass liquid. After taking out the molten glass, pour it into a graphite mold to form it, then move it into a preheated resistance furnace, anneal at 600°C for 30 min, and naturally cool to room temperature with the furnace temperature to obtain the initial sample.

[0034] 3) Part of the initial sample obtained in step 2) was cut and polished, and part of it was ground into powder to test its lum...

Embodiment example 3

[0041] 1) Weigh the raw material BaCO according to the molar ratio of 1:1:1:x:0.83:0.05:0.28 (where x=0.01, 0.02, 0.03, 0.04, 0.05) 3 , ZnO, SiO 2 , Eu 2 o 3 , H 3 BO 3 , NH 4 h 2 PO 4 , Na 2 SO 4 , the weighed raw materials were ground in an agate mortar for 30 minutes at room temperature, and mixed evenly to obtain a glass precursor for later use.

[0042] 2) Put the precursor in step 1) into a corundum crucible, put the precursor together with the crucible in a silicon-molybdenum furnace, keep it at 1400°C for 2 hours, and wait for it to melt and homogenize into glass liquid. After taking out the molten glass, pour it into a graphite mold to form it, then move it into a preheated resistance furnace, anneal at 600°C for 30 min, and naturally cool to room temperature with the furnace temperature to obtain the initial sample.

[0043] 3) Part of the initial sample obtained in step 2) was cut and polished, and part of it was ground into powder to test its luminescent ...

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Abstract

The invention relates to light-emitting glass containing a europium ion self-reducing capacity, and a preparation method thereof, which belong to the technical field of rare earth luminescent materials. The method provided by the invention is characterized by adopting a BaZnSiO4 glass matrix and utilizing a high-temperature melting method for reducing trivalent europium under an air atmosphere. The light-emitting glass is prepared from the following raw materials in parts by weight: 57.92 parts of BaCO3, 23.91 parts of ZnO, 17.65 parts of SiO2, 0.52 to 2.6 parts of Eu2O3, 10 to 15 parts of molten solvent, 0.68 to 4.08 parts of nucleation agent, and 1.18 parts of glass refining agent. Compared with other reducing methods, the preparation method does not need a special protection atmosphere,and is low in equipment requirement, simple to operate, remarkable in reducing effect, beneficial to reducing raw material and equipment investment, and green and environmentally friendly. Accordingto the prepared light-emitting glass, under the excitation of a 285nm to 350nm ultraviolet, an Eu<3+> characteristic emission wavelength (612nm) and an Eu<2+> characteristic emission band (380nm to 470nm) are appeared, and the longer the excitation wavelength is, the weaker the Eu<3+> emission light intensity is, the stronger the Eu<2+> emission light intensity is, and the better a relative reducing effect is; a CIE coordinate shows that product emitted lights excited by different excitation wavelengths can be regulated from pinkish red to blue light, and the product has good stability and canbe used as a light-emitting material.

Description

technical field [0001] The invention relates to a luminescent transparent glass containing europium ion self-reducing ability and a preparation method thereof, belonging to the field of rare earth luminescent materials. Background technique [0002] So far, white light-emitting diodes (LEDs) have been widely used in daily life. Compared with traditional incandescent and fluorescent lamps, they have the advantages of high brightness, low energy consumption, compact structure, high sensitivity and environmental protection. [0003] Currently commercial white LEDs are made of blue LED chips combined with yellow phosphors. There is also a method of uniformly mixing blue, green, and red phosphors with ultraviolet light to excite a certain proportion of the three primary colors to mix light and output white light. In this method, Eu 2+ Ion-doped phosphor is an important blue fluorescent material. Existing fluorescent powder coated LED chips have technical deficiencies such as po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/12C03C3/068C03B19/02C03B25/02C03B5/033
CPCC03B5/033C03B19/02C03B25/02C03C3/068C03C4/12
Inventor 赖杨丽孙利利余丽萍王官华
Owner HUNAN NORMAL UNIVERSITY
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