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A kind of composite fluorescent ceramic material and preparation method thereof

A technology of fluorescent ceramics and synthesis methods, which is applied to luminescent materials, heat exchange materials, chemical instruments and methods, etc., can solve the problem of low efficiency of fluorescent materials absorbing and converting blue light, thermal quenching, poor thermal shock resistance of fluorescent materials, etc. problems, to achieve excellent luminescence thermal stability and physical and mechanical properties, reduce production and preparation costs, and improve thermal shock resistance.

Active Publication Date: 2021-12-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blue light used as the excitation light source and the fluorescence emitted by fluorescent ceramics (green light, yellow light or red light) are mixed to form white light. However, the current lighting equipment for laser excitation of fluorescent materials still has the following outstanding problems: the efficiency of fluorescent materials to absorb and convert blue light is low; The color temperature of the emitted white light is higher than 6000K, and the spectral intensity of the green and red light bands is insufficient. The color rendering index is not high; The mixing uniformity of the fluorescent components is poor, which easily leads to uneven color of the far-field and near-field exit spots

Method used

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  • A kind of composite fluorescent ceramic material and preparation method thereof
  • A kind of composite fluorescent ceramic material and preparation method thereof
  • A kind of composite fluorescent ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A chemical composition is xY 2 o 3 -yLu 2 o 3 -zAl 2 o 3 -mSiO 2 -nMgO-pCe 2 o 3 A series of components of fluorescent ceramic materials are as follows:

[0043]

[0044] (1) Calculate the amount of each oxide substance by 100% mol, weigh Y respectively 2 o 3 , Lu 2 o 3 , Al 2 o 3 , SiO 2 , MgO, Ce 2 o 3 corresponding to the amount of substance. Use a grinding tank to add zirconia balls, and use absolute ethanol as the grinding medium for grinding and mixing until the average particle size of the powder is less than 1 μm;

[0045] (2) The obtained slurry is dried and sieved, and the sieved powder is kept at 1000°C in the air for 2 hours to remove the organic matter in the powder; after the obtained powder is sieved, it is molded with a uniaxial mold, and 4Mpa is applied Keep the pressure for 2 minutes, after the pressure is released and sealed, press it again in the cold isostatic pressing equipment to obtain the green body, the pressure is 200MPa, ...

Embodiment 2

[0050] A chemical composition of 10% Y 2 o 3 -8.725%Lu 2 o 3 -21.25%Al 2 o 3 -10% SiO2 2 -10%MgO-0.025%Tb 2 o 3 The preparation method of the fluorescent ceramic material is as follows:

[0051] (1) Calculate the amount of each oxide substance by 100% mol, weigh Y respectively 2 o 3 : 10% mol, Lu 2 o 3 :8.725%mol, Al 2 o 3 : 21.25% mol, SiO 2 : 10% mol, MgO: 10% mol, Tb 2 o 3 : 0.025% mol. Use a grinding tank to add zirconia balls, and use absolute ethanol as the grinding medium for grinding and mixing until the average particle size of the powder is less than 1 μm;

[0052] (2) The obtained slurry is dried and sieved, and the sieved powder is kept at 1000°C in the air for 2 hours to remove the organic matter in the powder; after the obtained powder is sieved, it is molded with a uniaxial mold, and 4Mpa is applied Keep the pressure for 2 minutes, after the pressure is released and sealed, press it again in the cold isostatic pressing equipment to obtain the g...

Embodiment 3

[0057] A chemical composition of 10% Y 2 o 3 -8.7%Lu 2 o 3 -16.25% Al 2 o 3 -15% SiO2 2 -15%MgO-0.05%Ce 2 o 3 The preparation method of the fluorescent ceramic material is as follows:

[0058] (1) Calculate the amount of each oxide substance according to 100% mol, and weigh Y 2 o 3 :-10%mol, Lu 2 o 3 : -18.7% mol, Al 2 o 3 : -16.25% mol, SiO 2 :-15%mol, MgO:-15%mol, Ce 2 o 3 : -0.05% mol. Use a grinding tank to add zirconia balls, and use absolute ethanol as the grinding medium to grind and mix until the average particle size of the powder is about 300nm;

[0059] (2) Dry and sieve the obtained slurry, heat the sieved powder in air at 850° C. for 2 hours to remove organic matter in the powder; sieve the obtained powder and wait for sintering for use;

[0060] (3) Put the ceramics in a muffle furnace for sintering. Start from room temperature with a heating rate of 5°C / min to 1200°C and keep it for 2 hours, then raise the temperature to 1680°C at 2°C / min and k...

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Abstract

The invention relates to the field of luminescent materials, in particular to a composite fluorescent ceramic material and a preparation method thereof. The chemical composition of the composite fluorescent ceramic material is xY 2 o 3 ‑yLu 2 o 3 ‑zAl 2 o 3 ‑mSiO 2 ‑nMgO‑pRe 2 o 3 , where x, y, z, m, n, p are mole percentages, and 2x+2y+2z+m+n+2p=100%, the fluorescent ceramic emission spectrum is in the 510-680nm band, and the wavelength of its luminescence peak can be By adjusting Y in the component 2 o 3 、Lu 2 o 3 、Al 2 o 3 , MgO and SiO 2 Change the ratio of the fluorescent emission peak from 520nm to 610nm, and its luminous efficiency is stable at high temperature (>80%@200℃). Sintering and post-processing steps. The problem of the lack of red light components in the spectrum of a single fluorescent transparent ceramic component is solved through the regulation of the components. The invention realizes high-quality and diversified choices for laser lighting and display, greatly reduces the design cost of the red light source, and is more conducive to The homogenization and color diversification of laser light source beams are of great significance to practical production applications.

Description

technical field [0001] The present invention relates to a kind of fluorescent transparent ceramics, in particular to a kind of multi-phase fluorescent ceramic material with wide-spectrum emission in the visible light band under the excitation of blue light and its preparation method, in particular to a kind of main phase luminescent matrix phase, auxiliary phase light-scattering component phase A fluorescent transparent ceramic material and a preparation method thereof belong to the technical field of inorganic luminescent materials. Background technique [0002] Fluorescent ceramic is a light-to-light conversion functional material with high conversion efficiency, high temperature resistance, excellent thermal shock resistance and long service life under the excitation of high-power blue light diode light source. It has high visible light transmittance and stable mechanical and physical and chemical properties. , can be widely used in technical fields such as infrared night...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/18C04B35/64C04B35/645C09K11/80C09K5/14
CPCC04B35/18C04B35/50C04B35/64C04B35/645C04B2235/3206C04B2235/3217C04B2235/3222C04B2235/3225C04B2235/3262C04B2235/3418C04B2235/662C04B2235/95C04B2235/9607C04B2235/9646C09K5/14C09K11/7774C09K11/7792
Inventor 李建强冯少尉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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