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High-thermal-conductivity tabular alumina porous ceramic for LED lamp heat dissipation, and preparation method thereof
The invention relates to high-thermal-conductivity tabular alumina porous ceramic for LED lamp heat dissipation. The ceramic is prepared from the raw materials of, by weight, 34-36 parts of alpha-Al2O3 (with particle size of 2-8,mum), 100-105 parts of deionized water, 0.2-0.3 parts of sodium polyacrylate, 2-2.3 parts of methylcellulose, 1.6-1.8 parts of glycerol, 1.6-1.9 parts of molybdenum disilicide powder, 0.5-0.6 parts of NbC, 0.1-0.2 parts of sodium hypophosphite, 0.2-0.4 parts of nano-grade montmorillonite, 0.4-0.6 parts of titanium dioxide nano-tube, 4-5 parts of nano-grade aluminum hydroxide, 1.2-1.5 parts of nano-grade copper, and 0.9-1.1 parts of a PVA binding agent. According to the tabular alumina porous ceramic, with the molybdenum disilicide powder, ceramic high-temperature oxidation resistance and thermal conductivity are improved, and ceramic thermal expansion coefficient is reduced. With NbC, nano-grade montmorillonite and titanium dioxide nano-tube, ceramic toughness is improved. The porous ceramic is suitable for heat dissipation of high-power LED chips.
High-thermal-conductivity tabular alumina porous ceramic for LED lamp heat dissipation, and preparation method thereof
The invention relates to high-thermal-conductivity tabular alumina porous ceramic for LED lamp heat dissipation. The ceramic is prepared from the raw materials of, by weight, 34-36 parts of alpha-Al2O3 (with particle size of 2-8,mum), 100-105 parts of deionized water, 0.2-0.3 parts of sodium polyacrylate, 2-2.3 parts of methylcellulose, 1.6-1.8 parts of glycerol, 1.6-1.9 parts of molybdenum disilicide powder, 0.5-0.6 parts of NbC, 0.1-0.2 parts of sodium hypophosphite, 0.2-0.4 parts of nano-grade montmorillonite, 0.4-0.6 parts of titanium dioxide nano-tube, 4-5 parts of nano-grade aluminum hydroxide, 1.2-1.5 parts of nano-grade copper, and 0.9-1.1 parts of a PVA binding agent. According to the tabular alumina porous ceramic, with the molybdenum disilicide powder, ceramic high-temperature oxidation resistance and thermal conductivity are improved, and ceramic thermal expansion coefficient is reduced. With NbC, nano-grade montmorillonite and titanium dioxide nano-tube, ceramic toughness is improved. The porous ceramic is suitable for heat dissipation of high-power LED chips.
High-thermal-conductivity tabular alumina porous ceramic for LED lamp heat dissipation, and preparation method thereof
DONG ZHAOHAI (Autor:in)
21.10.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2015
Sheet alumina porous ceramic for LED lamp heat dissipation and preparation method thereof
| Europäisches Patentamt | 2015
| Europäisches Patentamt | 2015