Fluorescent transparent ceramic capable of emitting blue-green light and preparation method thereof

A technology of transparent ceramics and blue-green light, applied in the field of fluorescent transparent ceramics and their preparation, can solve the problems of low density and low transmittance of ceramics, achieve the effect of healthy lighting and avoid energy loss

Inactive Publication Date: 2020-01-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low density and low transmittance of existing ceramics, and provide a fluorescent transparent ceramic emitting blue-green light and a preparation method thereof

Method used

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  • Fluorescent transparent ceramic capable of emitting blue-green light and preparation method thereof
  • Fluorescent transparent ceramic capable of emitting blue-green light and preparation method thereof
  • Fluorescent transparent ceramic capable of emitting blue-green light and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a preparation method of fluorescent transparent ceramics emitting blue-green light, comprising:

[0039] Step 1: According to the stoichiometric ratio of each element in the general chemical formula (I), respectively weigh oxides containing Ca, Ce, R, Sc, L, Si, K or their corresponding salts, and grind, the The grinding method is selected according to the sample size, which is manual grinding or ball milling. The manual grinding is to grind and mix evenly in an agate mortar; , corundum or agate balls and zirconia or corundum ball milling jars, milling and mixing on a ball mill for 0.5-5 hours, take out the powder after it is evenly mixed, dry and sieve successively to obtain a mixed powder;

[0040] Step 2: Put the mixed powder obtained in Step 1 into a mold and dry-press it into a thin sheet. The thin sheet is preferably annealed in a high-temperature furnace at 1000-1100°C for 4-6 hours to obtain a sheet-shaped green body;

[0041...

Embodiment 1

[0049] Ca 2.9194 Ce 0.0006 La 0.02 Li 0.06 sc 2 Si 3 o 12 preparation of

[0050] Weigh CaCO according to stoichiometric ratio 3 : 5.8441 g, La 2 o 3 : 0.0652 g, Sc 2 o 3 : 2.764 g, SiO 2 : 3.6048 g, CeO 2 : 0.0021 g, Li 2 CO 3 : 0.0665 g (due to Li 2 CO 3 Volatile, so excess 50%). Put the sample into a zirconia ball mill jar, use ethanol as the ball milling medium, and mix for 4 hours. The slurry after ball milling is dried and sieved successively. After sieving, the powder is dry-pressed into thin slices; Anneal for 6 hours to remove organic matter and decompose salts to obtain flake green body.

[0051] Cut a small piece of green body, put it into an air suspension furnace equipped with a double-beam carbon dioxide laser, use high-purity oxygen as a carrier gas, suspend and melt the sample, keep the sample in a molten state for 20s, and obtain a glass sphere of the corresponding composition ;Put the glass spheres into deionized water quickly, and let the ...

Embodiment 2

[0056] Ca 2.989 Ce 0.001 Lu 0.01 sc 1.99 Zr 0.01 Si 2.94 P 0.06 o 12 preparation of

[0057] Weigh CaCO according to stoichiometric ratio 3 : 2.9917 g, CeO 2 : 0.0017 g, Lu 2 o 3 : 0.0199 g, Sc 2 o 3 : 1.3751 g, ZrO 2 : 0.0123 g, SiO 2 : 1.7664 g, (NH 4 )H 2 PO 4 : 0.069 g. The sample was put into an agate mortar, ground and mixed for 45 minutes, the powder was manually pressed into thin flakes, and annealed in a high-temperature furnace at 1000°C for 5 hours to remove organic matter and decompose salts to obtain a flake green body. .

[0058] Cut a few thin slices into an air suspension furnace equipped with a double-beam carbon dioxide laser, and use high-purity oxygen as a carrier gas to suspend and smelt the sample, keep the sample in a molten state for 25 seconds, and obtain glass spheres of corresponding components; The spheres are quickly plunged into deionized water, causing the glass spheres to burst into small fragments due to the sudden cooling....

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Abstract

The invention provides a fluorescent transparent ceramic capable of emitting blue-green light and a preparation method of the fluorescent transparent ceramic, belonging to the technical field of luminescent materials. The chemical formula of the transparent ceramic is as shown in (I): (Ca<1-x-y>Ce<x>R<y>)<3>(Sc<1-z>L<z>)<2>(Si<1-m>K<m>)<3>O<12>, wherein R is one or more selected from the group consisting of elemental Y, Gd, La, Lu, Tb, Li and Na; L is one or more selected from the group consisting of elemental Zr, Hf and Mg; K is one or two selected from the group consisting of elemental Al and P; x is greater than or equal to 0.0002 and less than or equal to 0.02; y is greater than or equal to 0 and less than or equal to 0.03; z is greater than or equal to 0 and less than or equal to 0.02; m is greater than or equal to 0 and less than or equal to 0.02; and the sum of y, z and m is greater than 0 and less than 0.05. The invention also provides a preparation method of the fluorescent transparent ceramic capable of emitting blue-green light. The transparent ceramic disclosed by the invention can be effectively excited by blue light and emits broadband blue-green light with a peak value of 505 nm, so high-power monochromatic green light LED/LD can be prepared.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a fluorescent transparent ceramic emitting blue-green light and a preparation method thereof. Background technique [0002] As a new type of luminescent material based on transparent ceramics, ceramic phosphor not only has excellent mechanical and mechanical properties, but also has high thermal conductivity (thermal conductivity > 3W / m / K) and thermal stability. The monochromatic green LED / LD synthesized by ceramic phosphor has better photoelectric conversion efficiency and thermal stability than the LED / LD that directly emits the corresponding color; while the white LED synthesized by it has better thermal stability and color The uniformity of the angle distribution and the ability to work at a higher power density are an effective solution to the current LED / LD's low efficiency, poor stability and inability to meet the shortcomings of high-power applications. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/22
CPCC04B35/22C04B35/50C04B2235/3206C04B2235/3217C04B2235/3227C04B2235/3229C04B2235/36C04B2235/442C04B2235/447C04B2235/77C04B2235/9607C04B2235/9653
Inventor 张家骅肖文戈张霞武华君潘国徽张亮亮吴昊郝振东
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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