LED white ceramic base flow-casting sizing agent

A technology of casting slurry and white ceramics, which is applied in the field of LED ceramic base production, can solve the problems affecting the compactness, porosity and mechanical strength of ceramic bases, poor mixing uniformity, and poor powder dispersion. Achieve the effect of saving sintering energy, improving environmental protection performance, light transmittance and whiteness

Inactive Publication Date: 2017-10-10
郑州联冠科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is rough, which leads to poor dispersibility of the powder, which directly affects a series of characteristics such as the compactness, porosity and mechanical strength of the sintered ceramic base, the binder is poorly plasticized, and the uniformity of mixing and stirring is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of casting slurry of LED white ceramic base, comprising powder material system and solvent system, the weight ratio of powder material system and solvent system is 5:2, and described powder material system comprises aluminum oxide, kaolin, talcum powder, carbonic acid Calcium and lanthanum oxide, the weight percent of each component is: aluminum oxide 95%; Kaolin 2%; Talcum powder 2.5%; Calcium carbonate 0.1%; Lanthanum oxide 0.4%, described solvent system comprises solvent, binding agent, dispersion Agent and plasticizer, the weight percent of each component is: solvent 80%; Binding agent 10%; Dispersing agent 2.5%; Plasticizer 7.5%, described solvent is dehydrated alcohol, and binding agent is polyethylene Alcohol butyral, the dispersant is nonylphenol polyoxyethylene ether, and the plasticizer is dibutyl phthalate.

[0017] The preparation process for preparing the above-mentioned LED white ceramic base casting slurry includes the following process steps:

[...

Embodiment 2

[0025] Repeat Example 1, with the following differences: a kind of LED white ceramic base casting slurry, the percentage by weight of each component of the powder system is: alumina 94%; kaolin 2.4%; talcum powder 2.8%; calcium carbonate 0.45%; Lanthanum oxide 0.35%. The weight percentage of each component of the solvent system is: solvent 77.65%; binder 11.77%; dispersant 3.26%; plasticizer 7.32%. The weight ratio of the powder system to the solvent system is 7:3. The solvent is absolute ethanol, the binder is polyvinyl butyral, the dispersant is nonylphenol polyoxyethylene ether, and the plasticizer is dibutyl phthalate.

[0026] According to the preparation process of the LED white ceramic base casting slurry in Example 1 and the above-mentioned ratio to prepare the casting slurry, the aluminum oxide produced by sintering the above-mentioned LED white ceramic base casting slurry is 96% by weight. LED white ceramic base, compared with the LED white ceramic base of 96% alum...

Embodiment 3

[0028] Repeat Example 1, with the following differences: a casting slurry for LED white ceramic base, including a powder system and a solvent system, the weight ratio of the powder system to the solvent system is 2:1, and the powder system Including alumina, kaolin, talcum powder, calcium carbonate and lanthanum oxide, the weight percentage of each component is: alumina 93%; kaolin 3%; talcum powder 3%; calcium carbonate 0.5%; lanthanum oxide 0.5%, said The solvent system comprises solvent, binding agent, dispersant and plasticizer, and the percentage by weight of each component is: solvent 75%; Binding agent 15%; Dispersant 3.5%; Plasticizer 6.5%, described solvent is absolute ethanol. The binder is polyvinyl butyral, the dispersant is nonylphenol polyoxyethylene ether, and the plasticizer is dibutyl phthalate.

[0029] According to the preparation process in Example 1, the casting slurry is prepared by using the ratio of the above casting slurry, and then the casting slurry...

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PUM

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Abstract

The invention relates to an LED white ceramic base flow-casting sizing agent. The flow-casting sizing agent comprises a powder system and a solvent system in a weight ratio of (2 to 1)-(5 to 2), wherein the powder system contains the following components in percentage by weight: 93%-95% of aluminum oxide, 2%-3% of kaolin, 2.5%-3.5% of talcum powder, 0.1%-1% of calcium carbonate and 0.1%-0.5% of lanthanum oxide; and the solvent contains the following components in percentage by weight: 75%-80% of a solvent, 10%-15% of a binder, 2.5%-3.5% of a dispersing agent and 5%-10% of a plasticizer, and the solvent is absolute ethyl alcohol. By utilizing absolute ethyl alcohol as the solvent, environmental pollution and the harm caused to a human body are avoided, and the environmental protection property and safety performance of the flow-casting sizing agent are improved.

Description

technical field [0001] The invention relates to the technical field of LED ceramic base production, in particular to a casting slurry of a white ceramic base with an alumina content of 96% by weight. Background technique [0002] Ceramic base is the basic material of high-power electronic circuit structure technology and interconnection technology, which requires high mechanical strength, thermal conductivity, electrical insulation and chemical stability of the material. The 96% white ceramic base refers to a white ceramic base with a weight percentage of 96% alumina. White ceramic bases are widely used in LEDs due to their good light transmission properties. [0003] At present, the tape casting method is commonly used in the preparation of ceramic bases. First, mud-like casting slurry is prepared, and then the casting slurry is scraped into flakes with a scraper, and the flake slurry is formed into a green body after drying. , and then drill through holes to form a signal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/63C04B35/632
CPCC04B35/10C04B35/6303C04B35/632C04B2235/3208C04B2235/3227C04B2235/3445C04B2235/349C04B2235/6025
Inventor 王维
Owner 郑州联冠科技有限公司
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