Borosilicate rare earth luminescent microcrystalline glass, and preparation method and application thereof

A rare earth luminescence and borosilicate technology, applied in electrical components, circuits, semiconductor devices, etc., can solve the problems of poor stability of LED phosphors, reduced white light luminous efficiency, and different anti-aging performance, and achieve good photoluminescence performance , good color uniformity and low cost

Active Publication Date: 2019-11-19
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology

However, in the process of realizing white light, different phosphors absorb each other, the particle size distribution is inconsistent, and the anti-aging performance is also different, which reduces the luminous efficiency of white light.
In addition, the above-mentioned fluorescent powder is mixed with silica gel and directly coated on the LED chip. The fluorescent powder is close to the heat source, which may easily cause light decay of the fluorescent powder, thereby affecting the luminous efficiency.
[0005] To sum up, the existing LED phosphors have the problems of poor stability, low color rendering, low color temperature and easy light decay.

Method used

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  • Borosilicate rare earth luminescent microcrystalline glass, and preparation method and application thereof
  • Borosilicate rare earth luminescent microcrystalline glass, and preparation method and application thereof
  • Borosilicate rare earth luminescent microcrystalline glass, and preparation method and application thereof

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preparation example Construction

[0034] The present invention provides a method for preparing borosilicate rare earth luminescent glass-ceramics described in the above technical solution, comprising the following steps:

[0035] According to the chemical composition of borosilicate rare earth luminescent glass-ceramic, the oxide of Ln, Bi 2 o 3 、GeO 2 , oxides of RE, carbonates of M, Al 2 o 3 , SiO 2 and H 3 BO 3 Mixing and ball milling to obtain the mixed material;

[0036] Calcining and quenching the mixed material in sequence to obtain a precursor glass;

[0037] The precursor glass is sequentially annealed and polished to obtain borosilicate rare earth luminescent glass-ceramics.

[0038] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0039] According to the chemical composition of the present invention, the oxides of Ln, Bi, Ge and RE, the carbonate of M, Al 2 o 3 , SiO 2 and ...

Embodiment 1

[0050] The chemical composition is 30CaO·MgO·5Y 2 o 3 25B 2 o 3 50SiO2 2 0.05Al 2 o 3 : Preparation of 0.01Bi, 0.01Ge, 0.2Eu borosilicate rare earth luminescent glass-ceramics:

[0051] 3003g CaCO 3 , 84.3g MgCO 3 , 1129g Y 2 o 3 , 3092g H 3 BO 3 , 3005g SiO 2 , 5.1g Al 2 o 3 , 2.3g Bi 2 o 3 , 1.1g GeO 2 and 35.2g Eu 2 o 3 Put into a ball mill barrel, carry out ball milling for 8 hours, calcinate the obtained mixed material at 1650° C. in an air atmosphere for 0.5 hours, quench the obtained material to obtain a precursor glass; then reduce the precursor glass at 700° C. Mixed gas with nitrogen, the volume ratio of hydrogen and nitrogen is 0.75:1) and carry out annealing treatment 6h; Gained glass is naturally cooled, then polished on a 100-mesh polishing plate for 0.5h; polished on a 500-mesh polishing plate for 1h; finally Polishing on a 1000-mesh polishing plate for 2 hours, washing the obtained glass three times with water and three times with ethanol to...

Embodiment 2

[0054] The chemical composition is 30CaO·MgO·5Y 2 o 3 25B 2 o 3 50SiO2 2 0.05Al 2 o 3 : Preparation of 0.01Bi, 0.01Ge, 0.2Eu borosilicate rare earth luminescent glass-ceramics:

[0055] 3003g CaCO 3 , 84.3g MgCO 3 , 1129g Y 2 o 3 , 3092g H 3 BO 3 , 3005g SiO 2 , 5.1g Al 2 o 3 , 2.3g Bi 2 o 3 , 1.1g GeO 2 and 35.2g Eu 2 o 3 Put into a ball mill barrel, carry out ball milling for 8 hours, and calcinate the obtained mixture material at 1650° C. in an air atmosphere for 0.5 hours, quench the obtained material to obtain a precursor glass; then reduce the precursor glass at 900° C. in a reducing atmosphere (hydrogen gas Mixed gas with nitrogen, the volume ratio of hydrogen and nitrogen is 0.75:1) and carry out annealing treatment 6h; Gained glass is naturally cooled, then polished on a 100-mesh polishing plate for 0.5h; polished on a 500-mesh polishing plate for 1h; finally Polishing on a 1000-mesh polishing plate for 2 hours, washing the obtained glass three tim...

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Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to borosilicate rare earth luminescent microcrystalline glass, and a preparation method and applicationthereof. The chemical composition of the borosilicate rare earth luminescent microcrystalline glass is aMO.bLn<2>O<3>.cB<2>O<3>.dSiO<2>.eAl<2>O<3>: xBi, yGe, zRE. According to the invention, rare earth ions including RE, Bi, Ge, Al and the like are doped into the microcrystalline glass, and a crystal field around the rare earth ions is further adjusted by utilizing different ion radiuses, coordination potentials, bond types, bond lengths, coordination numbers and the like of the rare earth ions, so the control of color and luminous intensity is facilitated; and through sensitization of Bi ionsto other rare earth ions (such as Tb<3+>, Eu<3+>, Tm<3+>, Dy<3+> and the like), the microcrystalline glass has higher luminous intensity and can be applied to LED luminescent devices.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a borosilicate rare earth luminescent glass-ceramic and its preparation method and application. Background technique [0002] In recent years, the increasingly prominent shortage of energy and resources has become a serious problem, and the development and use of energy-saving light sources has become a mainstream trend. Among them, the white LED light source is called the mainstream trend of future energy-saving light source development because of its advantages of low cost, high luminous efficiency, long life, energy saving, and environmental protection. Based on the current domestic and foreign technologies, the realization of high-efficiency, long-life, and especially high-color-rendering lighting solutions has become a key factor for white LEDs to be resolved. [0003] Further improve the luminous efficiency of luminescent materials, research and explore red, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04C03C4/12H01L33/50
CPCC03C4/12C03C10/00H01L33/502
Inventor 樊彬刘军戚世梅赵文玉
Owner INNER MONGOLIA UNIV OF SCI & TECH
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