Low temperature, pressureless sintering of silicon nitride

Details Low temperature, pressureless sintering of silicon nitride Low temperature, pressureless sintering of silicon nitride

1993-12-23

1994-12-27

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 264 65, C04B 3558

Patent

active

053766024

ABSTRACT:
A silicon nitride-based powder composition that yields sintered bodies having a density of at least 3.15 g/cm.sup.3 by pressureless sintering. The composition includes silicon nitride and an amount of bismuth oxide as a phase transition aid in addition to magnesium oxide, aluminum oxide, zirconium oxide and, optionally, silicon dioxide. The sintered bodies can be produced at temperatures of 1650.degree. C. or less.

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