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A kind of ceramic slurry, preparation method and composite ceramic heat dissipation substrate

A technology of ceramic slurry and composite ceramics, which is applied in the field of composite ceramic materials, can solve problems such as poor heat conduction, heat dissipation, white spots of LED light sources, poor aging resistance, etc., achieve aging resistance service life, alleviate white spots, and high The effect of luminous efficiency

Active Publication Date: 2020-01-21
GUANGDONG REAL FAITH LIGHTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned problems in the prior art, the present invention provides a ceramic slurry, a preparation method and a composite ceramic heat dissipation substrate, which solve the problems of poor thermal conductivity and heat dissipation performance of the ceramic slurry and heat dissipation substrate in the prior art, high pressure resistance, high temperature resistance, Poor aging resistance, short service life and white point problem of LED light source

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A ceramic slurry includes ceramic powder, fluorescent powder, binder, dispersant, defoamer, coupling agent and curing agent, the ceramic powder is alumina ceramic powder, and the fluorescent powder is nitride. Alumina ceramic powder has excellent properties such as high thermal conductivity, high hardness, good wear resistance and light weight, and phosphor has high luminous efficiency.

[0040] The mass ratio of phosphor powder to alumina ceramic powder is 0.5-1:1;

[0041] The mass ratio of alumina ceramic powder to binder is 5-8:2-5;

[0042] The mass of the dispersant is 0.05% to 0.2% of the mass sum of the alumina ceramic powder and the binder;

[0043] The mass of the defoaming agent is 0.05% to 0.1% of the mass sum of the alumina ceramic powder and the binder.

[0044] The particle size D50 value of the alumina ceramic powder is 1-10 μm. Wherein, D50 is the average particle diameter, which means that 50% of the particle diameters conform to the numerical value...

Embodiment 2

[0067] Present embodiment is on the basis of embodiment 1, specifically as follows:

[0068] A ceramic slurry for a composite ceramic heat dissipation substrate, which includes ceramic powder, fluorescent powder, binder, dispersant, defoamer, coupling agent and curing agent, and the ceramic powder is alumina ceramic powder.

[0069] The mass ratio of phosphor powder to alumina ceramic powder is 0.6:1;

[0070] The mass ratio of alumina ceramic powder to binder is 6:4;

[0071] The quality of the dispersant is 0.1% of the sum of the quality of the alumina ceramic powder and the binder;

[0072] The quality of the defoamer is 0.1% of the sum of the alumina ceramic powder and the binder.

[0073] The average particle diameter of the alumina ceramic powder is 3 μm.

[0074] The preparation method of ceramic slurry comprises:

[0075] 1. Powder preparation

[0076] Alumina ceramic powder with an average particle size of 3 μm is selected and freeze-dried for 12 hours to prepare...

Embodiment 3

[0088] Present embodiment is on the basis of embodiment 1, specifically as follows:

[0089] A ceramic slurry for a composite ceramic heat dissipation substrate, which includes ceramic powder, fluorescent powder, binder, dispersant, defoamer, coupling agent and curing agent, and the ceramic powder is alumina ceramic powder.

[0090] The mass ratio of phosphor powder to alumina ceramic powder is 0.8:1;

[0091] The mass ratio of alumina ceramic powder to binder is 7:3;

[0092] The quality of the dispersant is 0.15% of the sum of the quality of alumina ceramic powder and binder;

[0093] The mass of the defoaming agent is 0.05% of the mass sum of the alumina ceramic powder and the binder.

[0094] The average particle diameter of the alumina ceramic powder is 3 μm.

[0095] The preparation method of ceramic slurry comprises:

[0096] 1. Powder preparation

[0097] Alumina ceramic powder with an average particle size of 3 μm is selected and freeze-dried for 12 hours to prep...

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Abstract

The invention relates to ceramic slurry, a preparation method and a composite ceramic radiating substrate. The ceramic slurry comprises ceramic powder, a binder, a dispersant, a defoaming agent, a coupling agent and a curing agent and is characterized by further comprising fluorescent powder; the ceramic powder is aluminum oxide ceramic powder; the mass ratio of the fluorescent powder and the aluminum oxide ceramic powder is 0.5-1:1; the mass ratio of the aluminum oxide ceramic powder and the binder is 5-8:2-5; the mass of the dispersant is 0.05%-0.2% of the mass sum of the aluminum oxide ceramic powder and the binder; and the mass of the defoaming agent is 0.05%-0.1%of the mass sum of the aluminum oxide ceramic powder and the binder. The ceramic slurry and the composite ceramic radiatingsubstrate prepared by the method has the advantages such as high thermal conductivity, radiating capability, high pressure resistance, high temperature resistance, ageing resistance and long service life, and meanwhile the problem of white spots of an LED light source is solved. The method for preparing the ceramic slurry is simple to operate and is suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of composite ceramic materials, and in particular relates to a ceramic slurry, a preparation method and a composite ceramic heat dissipation substrate. Background technique [0002] At present, the LED industry is developing rapidly. Due to its advantages such as high luminous efficiency, low energy consumption, long service life, and environmental protection, LED has gradually become the main lighting method. For the light source, the lower the junction temperature, the higher the instantaneous brightness, the slower the light decay, and the longer the service life, so the substrate needs to have a good heat dissipation effect. [0003] However, there is a shortcoming in the LED light source, that is, the heat dissipation efficiency of the heat dissipation substrate is not high, which affects the service life of the LED light source. The LED heat dissipation substrate mainly utilizes the good thermal condu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08C04B26/10
CPCC04B26/10C04B2111/00525C23C24/08C04B14/303C04B2103/0068C04B2103/408C04B24/42C04B14/325
Inventor 罗双凌丁萍
Owner GUANGDONG REAL FAITH LIGHTING TECH