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Infrared incoherent LED-excited upconversion naluf 4 Glass ceramics and preparation method thereof

A glass ceramic and ceramic technology, applied in the field of solid light emitting, can solve problems such as radiation risk, and achieve the effects of excellent optical properties, good physical and chemical stability, and simple preparation process

Active Publication Date: 2020-11-06
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since infrared lasers are invisible to the naked eye, there is a certain radiation risk in use

Method used

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  • Infrared incoherent LED-excited upconversion naluf <sub>4</sub> Glass ceramics and preparation method thereof
  • Infrared incoherent LED-excited upconversion naluf <sub>4</sub> Glass ceramics and preparation method thereof
  • Infrared incoherent LED-excited upconversion naluf <sub>4</sub> Glass ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] According to the following molar ratio 55SiO 2 : 3Al 2 o 3 : 16Na 2 O: 15NaF: 10LuF 3 : 0.9YbF 3 : 0.1ErF 3 Accurately weigh the required raw materials, grind them for 1 hour, put the evenly mixed raw materials in a muffle furnace for melting, keep them at 1500°C for 45 minutes, then take out the melt and pour it into a mold for cold molding to obtain a block precursor Glass. The precursor glass was put into a muffle furnace and kept at 450°C for 2 hours to obtain a bulk glass ceramic.

[0055] X-ray diffraction peaks show that in the glass matrix, the hexagonal phase NaLuF has been precipitated 4 crystal phase (Figure 1). The emission spectrum of the infrared incoherent LED chip showed a center wavelength at 940 nm (Figure 2). The up-conversion emission spectrum under the excitation of infrared incoherent LED chip was measured by FS5 fluorescence spectrometer. On the emission spectrum excited by the infrared incoherent LED chip with a center wavelength of 940...

Embodiment 2

[0057] According to the following ratio 60SiO 2 : 3Al 2 o 3 : 13Na 2 O: 13NaF: 10LuF 3 : 0.9YbF 3 : 0.1ErF 3 Accurately weigh the required raw materials, grind them for 1 hour, put the evenly mixed raw materials in a muffle furnace for melting, keep them at 1500°C for 45 minutes, then take out the melt and pour it into a mold for cold molding to obtain a block precursor Glass. The precursor glass was put into a muffle furnace and kept at 450°C for 2 hours to obtain a bulk glass ceramic. X-ray diffraction peaks show that in the glass matrix, the hexagonal phase NaLuF has been precipitated 4 crystal phase ( Figure 4 ). The glass-ceramic appears bright green when excited by an infrared incoherent LED chip.

Embodiment 3

[0059] Proportion 55SiO as follows 2 : 3Al 2 o 3 : 16Na 2 O: 15NaF: 10LuF 3 : 0.95YbF 3 : 0.05HoF 3 Accurately weigh the required raw materials, grind them for 1 hour, put the evenly mixed raw materials in a muffle furnace for melting, keep them at 1500°C for 45 minutes, then take out the melt and pour it into a mold for cold molding to obtain a block precursor Glass. The precursor glass was put into a muffle furnace and kept at 450°C for 2 hours to obtain a bulk glass ceramic. X-ray diffraction peaks show that in the glass matrix, the hexagonal phase NaLuF has been precipitated 4 crystal phase. The glass-ceramic appears bright green when excited by an infrared incoherent LED chip.

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Abstract

The invention discloses an infrared incoherent LED induced up-conversion NaLuF4 glass ceramic and a preparation method thereof. According to the infrared incoherent LED induced up-conversion NaLuF4 glass ceramic, a glass matrix is embedded with hexagonal-phase NaLuF4 nanocrystalline particles. The infrared incoherent LED induced up-conversion NaLuF4 glass ceramic is composed of, by mole percentage(mol%), 50-75 mol% of SiO2, 1-15 mol% of Al2O3, 5-30 mol% of Na2O, 5-25 mol% of NaF, 5-15 mol% of LuF3, 0.01-2 mol% of YbF3, and 0.001-2 mol% of ReF3, wherein Re is selected from Er, Tm or Ho. The infrared incoherent LED induced up-conversion NaLuF4 glass ceramic is prepared through the melt quenching technology and subsequent crystallization heat treatment. The can achieve up-conversion emittance of rear earth ions under induction of an infrared incoherent LED chip, thereby being applicable to developing up-conversion luminescent glass ceramics applied to structuring infrared chip induction.

Description

technical field [0001] The invention relates to the field of solid-state luminescence, in particular to a Yb that can be used for excitation and up-conversion emission of infrared incoherent LED chips 3+ , Re 3+ (Re=Er,Tm,Ho):β-NaLuF 4 Hexagonal NaLuF 4 Transparent glass-ceramic and its preparation method. Background technique [0002] In recent years, rare earth ion-doped upconversion luminescent materials have attracted extensive attention due to their broad application prospects in the fields of three-dimensional display, solid-state laser, biomarkers, photothermal therapy, temperature sensing, and solar cells. Among them, the selection and structure control of the host material is one of the key factors to achieve high-efficiency upconversion luminescence. Fluorides, which have relatively low phonon energy and stable physical and chemical properties, also have high solid solubility of rare earths, are high-quality upconversion matrix materials with broad application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/16C03C3/112C03B32/02
CPCC03B32/02C03C3/112C03C10/16
Inventor 李心悦陈大钦
Owner HANGZHOU DIANZI UNIV