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Method for preparing high-heat-conductivity aluminum nitride ceramics by self-propagating powder
The invention relates to the field of preparation of aluminum nitride ceramics and provides a method for preparing high-heat-conductivity aluminum nitride ceramics by self-propagating powder. Heat conductivity of the aluminum nitride ceramics obtained by the method is larger than 160 W/m by K, heat transfer performance is high, and high-power LED packaging requirements can be met. The method includes of thermal pre-treatment of self-propagating powder and preparation of tape casting slurry, tape casting green-ware and ceramic substrates. The thermal-pretreatment of the self-propagating powder includes treating the self-propagating aluminum nitride powder in a graphite oven at the high temperature, the preparation of tape casting slurry includes preparing sintering additives which are Y2O3 and TiO2 composition, the Y2O3 additive amount is 3-8wt%, the TiO2 additive amount is 0.5-1wt%, and the preparation of ceramic substrates adopts high-temperature pressureless sintering.
Method for preparing high-heat-conductivity aluminum nitride ceramics by self-propagating powder
The invention relates to the field of preparation of aluminum nitride ceramics and provides a method for preparing high-heat-conductivity aluminum nitride ceramics by self-propagating powder. Heat conductivity of the aluminum nitride ceramics obtained by the method is larger than 160 W/m by K, heat transfer performance is high, and high-power LED packaging requirements can be met. The method includes of thermal pre-treatment of self-propagating powder and preparation of tape casting slurry, tape casting green-ware and ceramic substrates. The thermal-pretreatment of the self-propagating powder includes treating the self-propagating aluminum nitride powder in a graphite oven at the high temperature, the preparation of tape casting slurry includes preparing sintering additives which are Y2O3 and TiO2 composition, the Y2O3 additive amount is 3-8wt%, the TiO2 additive amount is 0.5-1wt%, and the preparation of ceramic substrates adopts high-temperature pressureless sintering.
Method for preparing high-heat-conductivity aluminum nitride ceramics by self-propagating powder
YANG DASHENG (author) / SHI CHUNXI (author)
2015-06-24
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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