Ce: YAG microcrystalline glass and application thereof in white-light LED

A glass-ceramic and glass technology, applied in the field of LED fluorescent materials, can solve the problems of inability to use commercial blue light chips, poor optical performance of glass-ceramic, poor uniformity of rare earth ions, etc., and achieves low cost, stable physical and chemical properties, and excitation and emission efficiency. high effect
CN104529166AActive Publication Date: 2015-04-22WENZHOU UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WENZHOU UNIVERSITY
Publication Date
2015-04-22

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Abstract

The invention discloses Ce: YAG microcrystalline glass and application thereof in a white-light LED. The microcrystalline glass is prepared from the following raw materials in mole percentage: 19-24% of Y2O3, 33-39% of Al2O3, 28-40% of SiO2, 4-5% of ZrO2 and 3-5% of a fluoride nucleation agent; the preparation method of the microcrystalline glass comprises the following steps: (1) mixing glass materials; (2) melting glass materials, namely heating the glass materials in a crucible by virtue of a high-temperature resistant furnace, melting at a temperature is 1600-1700 DEG C, preserving heat for 2-5hr, pouring a glass melt on a cast iron mould, then annealing the glass melt in a high-temperature furnace, preserving heat at glass transition temperature Tg for 2-5hr and cooling with the furnace to 50 DEG C; turning off the power supply of the high-temperature furnace, automatically cooling to room temperature and taking out glass; and (3) carrying out insulation treatment, namely carrying out heat treatment on the glass in a precision annealing furnace at 1200-1400 DEG C for 1-10hr, cooling with the furnace to 50 DEG C, turning off the power supply of the precision annealing furnace, and automatically cooling to room temperature so as to obtain the semitransparent Ce: YAG microcrystalline glass.
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Description

(1) Technical field

[0001] The invention relates to a Ce:YAG glass-ceramic and its application in white light LEDs, belonging to the technical field of LED fluorescent materials. (2) Background technology

[0002] White light LED has the advantages of small size, low calorific value, low power consumption, long life, fast response, environmental protection, planar packaging, and easy development into thin, light and compact products. Generation lighting source", the application prospect is very broad. At present, the white light LED fluorescent material mainly uses amorphous phosphor as the main body, and the commercialized white light LED product is based on the combination of chip and phosphor to form white light as the mainstream of development. At present, the manufacture of high-efficiency, high color rendering index, low color temperature, and high-power white LEDs has become an urgent need for LED development. Therefore, the performance of fluorescent materials (exci...

Claims

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