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Glass ceramic for up-conversion laser solid illumination, preparation method thereof and solid illuminating device

A technology of solid-state lighting and glass ceramics, applied in glass manufacturing equipment, optical elements for changing the spectral characteristics of emitted light, and components of lighting devices, etc., can solve problems such as sudden drop in efficiency and difficulty in realization, and achieve low cost , simple device structure and easy fabrication

Inactive Publication Date: 2019-05-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the power density of traditional commercial blue light-emitting diodes (LEDs) is higher than 3W / cm 2 There will be a phenomenon of "sudden drop in efficiency" and it is already difficult to achieve this goal

Method used

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  • Glass ceramic for up-conversion laser solid illumination, preparation method thereof and solid illuminating device
  • Glass ceramic for up-conversion laser solid illumination, preparation method thereof and solid illuminating device
  • Glass ceramic for up-conversion laser solid illumination, preparation method thereof and solid illuminating device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: SiO 2 、Al 2 o 3 、Na 2 CO 3 , NaF, YbF 3 , YF 3 and ErF 3 According to 62SiO 2 : 6Al 2 o 3 : 5Na 2 CO 3 :19NaF:1.6YbF 3 : 6.24YF 3 : 0.16ErF 3 The ratio (molar ratio) is accurately weighed, ground evenly in an agate mortar, placed in a crucible, heated to 1500°C in a resistance furnace, and kept for 45 minutes, and then the molten glass is quickly poured into a 500°C preheated Forming in a copper mold; the annealed glass continues to be heated and kept at 650 ° C for 2 hours to crystallize it to obtain Yb 3+ / Er 3+ Doped NaYF 4 Embedded transparent glass-ceramic composite.

[0034] X-ray Diffraction Patterns Show Cubic NaYF Precipitated in Aluminosilicate Glass Substrate 4 crystal phase ( figure 1 ); transmission electron microscopy photos show that there are a large number of NaYF with a size of about 20nm evenly distributed in the glass ceramics 4 crystal phase ( figure 2 ), the glass ceramic emits yellow light under excitation at 98...

Embodiment 2

[0035] Embodiment 2: SiO 2 、Al 2 o 3 、Na 2 CO 3 , NaF, YbF 3 , YF 3 and ErF 3 According to 55SiO 2 : 6Al 2 o 3 : 12Na 2 CO 3 :19NaF:1.6YbF 3 : 6.24YF 3 : 0.16ErF 3 The ratio (molar ratio) is accurately weighed, ground evenly in an agate mortar, placed in a crucible, heated to 1450°C in a resistance furnace and kept for 45 minutes, and then quickly poured the molten glass into a 500°C preheated Forming in a copper mold; the annealed glass continues to be heated and kept at 650 ° C for 2 hours to crystallize it to obtain Yb 3+ / Er 3+ Doped NaYF 4 Embedded transparent glass-ceramic composite.

[0036] X-ray Diffraction Patterns Show Hexagonal NaYF Precipitated in Aluminosilicate Glass Substrate 4 crystal phase ( Figure 4 ); transmission electron microscopy photos show that there are a large number of NaYF with a size of about 20nm evenly distributed in the glass ceramics 4 crystal phase ( Figure 5 ), the glass ceramic emits green light under excitation at 9...

Embodiment 3

[0037] Embodiment 3: SiO 2 、Al 2 o 3 、Na 2 CO 3 , NaF, YbF 3 , YF 3 and ErF 3 According to 55SiO 2 : 6Al 2 o 3 : 12Na 2 CO 3 :19NaF:1.6YbF 3 : 6.38YF 3 : 0.02TmF 3 The ratio (molar ratio) is accurately weighed, ground evenly in an agate mortar, placed in a crucible, heated to 1500°C in a resistance furnace, and kept for 45 minutes, and then the molten glass is quickly poured into a 500°C preheated Forming in a copper mold; the annealed glass continues to be heated and kept at 650 ° C for 2 hours to crystallize it to obtain Yb 3+ / Tm 3+ doped hexagonal NaYF 4 Embedded transparent glass-ceramic composite. Glass ceramics emit blue light under 980nm laser excitation.

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Abstract

The invention discloses a glass ceramic for up-conversion laser solid illumination, a preparation method thereof and a solid illuminating device. The glass ceramic comprises the following components:50-78mol% of SiO2, 5-12mol% of Al2O3, 4-16mol% of Na2CO3, 15-30mol% of NaF, x mol% of YbF3, y mol% of YF3, z mol% of ErF3 and u mol% of TmF3, wherein x+y+z+u=8; x is more than or equal to 0.8 but lessthan or equal to 4.0; y is more than or equal to 4.5 but less than or equal to 6.6; z is more than or equal to 0 but less than or equal to 0.16; u is more than or equal to 0 but less than or equal to0.1; total molar weight of the components is 100mol%. The glass ceramic disclosed by the invention is prepared by adopting a fusion quenching method and subsequent thermal treatment; the acquired glass ceramic is capable of realizing up-conversion luminescence regulation of red, green and blue color (including white light) under the excitation of 980nm laser; a laser-driven solid illuminating device can be constructed by coupling the glass ceramic with 980nm laser.

Description

technical field [0001] The invention belongs to the technical field of solid luminescent materials, and in particular relates to a glass ceramic that can be used for up-conversion laser solid-state lighting, a preparation method thereof, and a solid-state lighting device. Background technique [0002] In recent years, the pursuit of white light sources with higher power, higher brightness and smaller size has become one of the research hotspots. Since the power density of traditional commercial blue light-emitting diodes (LEDs) is higher than 3W / cm 2 Sometimes there will be a phenomenon of "sudden drop in efficiency", and it is already difficult to achieve this goal. And the laser diode (LD) has a power density below 25kW / cm 2 None of them will have such a negative effect, so it is considered to be one of the most promising candidates for the next generation of high-brightness light sources. In fact, phosphor conversion materials based on laser lighting (including phospho...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03C4/12C03B19/02C03B32/02F21V9/30
Inventor 陈江坤陈大钦黄烽
Owner FUJIAN NORMAL UNIV
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