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Multiphase fluorescent ceramic and preparation method thereof

A technology of fluorescent ceramics and dielectric ceramics, applied in chemical instruments and methods, luminescent materials, additive processing, etc., can solve problems such as increasing heterogeneous interfaces and interface phonon scattering, hindering directional transport, and limited contribution to heat dissipation efficiency

Active Publication Date: 2020-07-07
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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  • Multiphase fluorescent ceramic and preparation method thereof
  • Multiphase fluorescent ceramic and preparation method thereof
  • Multiphase fluorescent ceramic and preparation method thereof

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, 1.2g2,2-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 alumin...

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 multiphase fluorescent ceramic and a preparation method thereof. The multiphase fluorescent ceramic comprises a high-thermal-conductivity dielectric ceramic matrix and fluorescent ceramic main bodies which are distributed in the high-thermal-conductivity dielectric ceramic matrix and are periodically arranged; the shortest distance L between the adjacent fluorescent ceramic main bodies is 200-1000 microns, and the volume fraction delta of the high-thermal-conductivity dielectric ceramic matrix in the multiphase fluorescent ceramic is 5-60%; the fluorescent ceramic main body is rare earth doped transparent ceramic; and the material of the high-thermal-conductivity dielectric ceramic matrix is selected from at least one of Al2O3, AlN, BeO, Sc2O3, Si3N4, BN, SiC andMgO.

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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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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