Silicon nitride sintered body having high heat conductivity...

Details Silicon nitride sintered body having high heat conductivity... Silicon nitride sintered body having high heat conductivity...

2007-03-20

2007-03-20

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C501S097300

Reexamination Certificate

active

11350020

ABSTRACT:
A silicon nitride sintered body exhibiting a high heat conductivity, the silicon nitride sintered body includes a rare earth element in an amount of 2 to 17.5 mass % in terms of the oxide thereof, Fe in an amount of 0.07 to 0.5 mass % in terms of the oxide thereof, Ca in an amount of 0.07 to 0.5 mass % in terms of the oxide thereof, Al in an amount of 0.1 to 0.6 mass % in terms of the oxide thereof, Mg in an amount of 0.3 to 4 mass % in terms of the oxide thereof, and Hf in an amount not larger than 5 mass % (including 0 mass %) in terms of the oxide thereof.

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