Silicon nitride composite sintered body and process for producin

Details Silicon nitride composite sintered body and process for producin Silicon nitride composite sintered body and process for producin

1994-03-31

1995-01-24

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 98, C04B 3558

Patent

active

053842928

ABSTRACT:
A silicon nitride composite sintered which comprises crystal grains of silicon nitride and/or sialon having an average minor axis length of 0.05 to 3 .mu.m and an aspect ratio of 10 or less and foreign particles dispersed in the crystal grains and/or the grain boundary phase, said particles having a thermal expansion coefficient of 5.times.10.sup.-6 /.degree.C. or more and an average particle size of 1 to 500 nm. The sintered body is produced by wet mixing silicon nitride powder, at least two sintering aids selected from among Y.sub.2 O.sub.3, Al.sub.2 O.sub.3, AlN and MgO and at least one compound selected from among the oxides, nitrides, carbides and silicides of the elements, excluding Si and C, of the groups IIa, IIIa, IVa, Va, VIa, IIb, IIIb and IVb of the Periodic Table to form a molding; and heat treating under the specified conditions. The sintered body can also be obtained by coating the surfaces of silicon nitride crystal grains with an organometallic compound convertible to the above foreign particles, heat treating and sintering with the sintering aid.

REFERENCES:
patent: 4923829 (1990-05-01), Yasutomi et al.
patent: 5045513 (1991-09-01), Mizuno et al.
patent: 5178647 (1993-01-01), Komatsu et al.
patent: 5214009 (1993-05-01), Komatsu et al.
patent: 5316856 (1994-05-01), Suzuki et al.

Affiliated with

Also associated with

Rating

Silicon nitride composite sintered body and process for producin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Silicon nitride composite sintered body and process for producin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Silicon nitride composite sintered body and process for producin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1468559