Ce:YAG fluorescent glass for white-light LED and preparation method of Ce:YAG fluorescent glass

Abstract

The invention provides low-softening-point Ce:YAG fluorescent glass for white-light LED and a preparation method of the Ce:YAG fluorescent glass. According to the Ce:YAG fluorescent glass, Ce:YAG microcrystals are uniformly dispersed in an oxide glass matrix, and the addition amount of the Ce:YAG microcrystals is 1%-20% of the weight of the oxide glass matrix. The preparation method of the Ce:YAG fluorescent glass comprises the following steps: after uniformly mixing multiple oxide powder, and melting, so as to obtain a glass melt; rapidly pouring the glass melt into cold water, so as to obtain glass fragments; crushing and milling the glass fragments into uniform powder, and sieving; uniformly mixing sieved glass powder with Ce:YAG fluorescent microcrystals, heating, taking out the mixture, and forming, so as to obtain a green body; and annealing the green body, so as to obtain the low-softening-point Ce:YAG fluorescent glass for the white-light LED. The Ce:YAG fluorescent glass has the beneficial effects that formula components are few, the raw materials are cheap, the softening point is low, and the preparation process is simple; the Ce:YAG fluorescent glass is applicable to mass production; the obtained fluorescent glass material is high in transparency.

Description

technical field [0001] The invention relates to a low-softening-point Ce:YAG fluorescent glass for white light LEDs and a preparation method thereof, belonging to the field of luminescent materials. Background technique [0002] At present, white light-emitting diode (LED) lighting has many advantages such as energy saving, environmental protection, long life, and strong designability. It has attracted great attention from people and is gradually replacing traditional incandescent and fluorescent lamps. A common white light LED is implemented by coating a blue LED chip with a phosphor that emits yellow light that can be excited by blue light, and the blue light and yellow light are mixed to form white light. However, the coated phosphor needs to be mixed with epoxy resin and other binders before coating. The thermal conductivity and chemical stability of epoxy resin and other binders are poor, epoxy resin is easy to age, and fluorescent materials are easy to light decay, res...

AI Technical Summary

Problems solved by technology

Since the main component of the glass matrix is ​​silicon-aluminum oxide, the transparency of the material is poor, and there are many microcrystalline lattice defects precipitated by high-temperature crystallization, resulting in low luminous efficiency.

[0007] Wuhan University of Technology applied for the patent of Chinese invention patent CN101643315B "low softening point fluorescent glass for white light LED and its preparation method", which discloses a fluorescent glass containing Ce:YAG fluorescent crystal phase, and the glass matrix component is Na 2 O-ZnO-B 2 o 3 -SiO 2 -Al 2 o 3 -CaO-MgO-K 2 O, there are many glass components, and the transparency of the glass body is low, resulting in poor luminous effect

[0008] The patent of Chinese patent CN103183473A "Ce:YAG glass-ceramic and its preparation method for white light LED" discloses a fluorescent glass containing Ce:YAG fluorescent crystal phase, and the glass matrix component is TeO 2 -GeO 2 -ZnO-K 2 O-SiO 2 -B 2 o 3 -Sb 2 o 3 -..., TeO in the raw material of the glass component 2 、GeO 2 The price is relatively expensive, not suitable for the mass production of civilian LED fluorescent materials

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