Phosphate fluorescent glass ceramic capable of emitting light in pure white light and preparation method of phosphate fluorescent glass ceramic

By doping Dy3+, Tm3+ and Eu3+ ions in phosphate fluorescent glass ceramic materials and preparing materials rich in BaZn2(PO4)2 nanocrystals, the shortcomings of existing white LEDs in color temperature and chromaticity coordinate adjustment are solved, and efficient and stable near-positive white light emission is achieved.

CN119707293APending Publication Date: 2025-03-28XINJIANG TECH INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202311261094.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-27
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing manufacturing methods of white LEDs are limited in the adjustment of color temperature and chromaticity coordinates, and cannot obtain ideal color rendering performance. There are problems such as inconsistent use temperature and life of phosphors, which affects the luminescence quality.

Method used

P2O5-BaO-ZnO-B2O3 glass matrix, doped with Dy3+, Tm3+ and Eu3+ ions, was used to prepare phosphate fluorescent glass ceramic materials rich in BaZn2(PO4)2 nanocrystals by melt quenching.

Benefits of technology

It realizes the purity and luminous stability of the luminous color, has good thermal stability and efficient photoelectric conversion efficiency, the chromaticity coordinates are close to positive white light emission, and the color temperature is close to 5802K.

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Abstract

The invention relates to pure white light-emitting phosphate fluorescent glass ceramic and a preparation method thereof. The phosphate fluorescent glass ceramic comprises the following components in percentage by mass: 28-38% of P2O5, 6-12% of BaO, 36-48% of ZnO and 14-18% of B2O3, Dy < 3 + >, Tm < 3 + > and Eu < 3 + > are doped in the glass matrix in the form of compounds, and the doped dysprosium-containing compound, thulium-containing compound and europium-containing compound respectively account for 0.25-1%, 0.25-1% and x (0.25% < = x < = 1%) of the total mass of other raw materials. The glass ceramic material has relatively high crystallinity and transparency, the excitation spectrum of the glass ceramic material is in an ultraviolet region, and emission of nearly pure white light can be realized by obtaining a proper Eu < 3 + > doping amount after adjustment. The sample provided by the invention has good thermal stability and excellent luminescence performance, and can be used as a novel fluorescent material applied to the field of luminescence.
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