A kind of composite fluorescent ceramic and its preparation method

A technology of fluorescent ceramics and dielectric ceramics, applied in chemical instruments and methods, luminescent materials, additive processing, etc., can solve problems such as limited contribution of heat dissipation efficiency, increased hetero interface and interface phonon scattering, hindered directional transport, etc. , to achieve the effect of increasing the excitation saturation threshold and improving the thermal stability of the luminescence

Active Publication Date: 2021-05-25
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of discontinuous Al 2 o 3 Grains increase heterointerfaces and interfacial phonon scattering, hindering directional transport of heat
Therefore, from the perspective of interface thermal resistance, the contribution of the diffusely distributed high thermal conductivity medium to the improvement of heat dissipation efficiency is limited.

Method used

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  • A kind of composite fluorescent ceramic and its preparation method
  • A kind of composite fluorescent ceramic and its preparation method
  • A kind of composite fluorescent ceramic and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this embodiment 1, the preparation process of the composite fluorescent ceramics inside includes:

[0042] (1) Accurately weigh 80g Al 2 o 3 For the ceramic powder, 19.3 g of photosensitive resin was added, and after blending, a planetary mill was used to fully mix to obtain a ceramic slurry. The composition of the photosensitive resin comprises 12.3g epoxy acrylate resin, 1.2g epoxy resin, 1.2g 2,2-diethoxyacetophenone, 0.8g hydrogenated castor oil and 3.8g tetrahydrofuran acrylate;

[0043] (2) if figure 1 As shown, the internal periodic structure parameters of the designed periodic structure composite fluorescent ceramics are: δ is 40%; the channel structure is set as a regular hexagon, the wall thickness between the porous channels in the matrix is ​​300 μm, and the effective side length of the channel structure is set 700μm, and then input into the 3D printer program;

[0044] (3) Pour the obtained ceramic slurry into a 3D printer trough, and print the alumi...

Embodiment 2

[0058] The multiphase fluorescent ceramics in Example 2 are basically the same as in Example 1, the difference is that LuAG:Ce is selected as the fluorescent ceramic body (doping amount 0.15mol%), MgO is selected as the high thermal conductivity medium ceramic matrix, L is 450 μm, δ was 28%.

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Abstract

The invention relates to a composite fluorescent ceramic and a preparation method thereof. The composite fluorescent ceramic comprises: a high thermal conductivity medium ceramic substrate, and periodically arranged fluorescent ceramic bodies distributed in the high thermal conductivity medium ceramic substrate; adjacent fluorescent ceramics The shortest distance L between the ceramic bodies is 200-1000 μm, and the volume fraction δ of the high thermal conductivity medium ceramic matrix in the composite fluorescent ceramic is 5-60%; the fluorescent ceramic body is a rare earth doped transparent ceramic; the high thermal conductivity medium The material of the ceramic matrix is ​​selected from Al 2 o 3 , AlN, BeO, Sc 2 o 3 、Si 3 N 4 , at least one of BN, SiC and MgO.

Description

technical field [0001] The invention relates to a composite fluorescent ceramic with excellent luminescent thermal stability and a preparation method thereof, in particular to a method for improving the thermal conductivity of fluorescent ceramics, and belongs to the technical field of fluorescent material applications. Background technique [0002] In laser display devices based on laser-excited remote phosphor technology (LARP), light-converting materials are one of the cores, and are also research hotspots in recent years. The luminescence stability is directly related to the quality of the device. Phosphors encapsulated in resin, rare earth-doped glass and glass-ceramic and other inorganic light-emitting materials are competing to develop, which continuously promotes the improvement of the quality of laser display devices. During this development process, rare earth-doped transparent ceramics (referred to as fluorescent ceramics) stand out in the field of laser display ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/582C04B35/08C04B35/50C04B35/584C04B35/5835C04B35/565C04B35/04C04B35/622B33Y70/10C09K11/02C09K11/80
CPCB33Y70/00C04B35/04C04B35/08C04B35/10C04B35/50C04B35/565C04B35/581C04B35/583C04B35/584C04B35/622C04B2235/9646C04B2235/9653C09K11/025C09K11/7774
Inventor 胡松陈晗薛振海王正娟张芸莉李宏书周国红王士维
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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