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
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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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