Sintered material based on Si.sub.3 N.sub.4 and processes for it

Details Sintered material based on Si.sub.3 N.sub.4 and processes for it Sintered material based on Si.sub.3 N.sub.4 and processes for it

1992-12-23

1994-11-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 96, 501 98, 501154, 423344, 264 63, 264 65, 264299, 264DIG64, C04B 3558

Patent

active

053626915

ABSTRACT:
Si.sub.3 N.sub.4 -based sintered compositions containing MgO and optionally other sintering additives, which after sintering, has a flexural strength level at room temperatures of .gtoreq.800 MPa, measured by the four-point bending method, and a Weibull modulus of >15, is produced by mixing MgO, any additional sintering additives and Si.sub.3 N.sub.4 powder to form a mixture, calcining the mixture in an oxygen-free atmosphere to obtain a pre-synthesis mixture, and adding the pre-synthesis mixture to uncalcined Si.sub.3 N.sub.4 powder which is then sintered.

REFERENCES:
patent: 3836374 (1974-09-01), Richerson et al.
patent: 4004937 (1977-01-01), Masaki
patent: 4264547 (1981-04-01), de Pous
patent: 4351787 (1982-09-01), Martinengo et al.
patent: 4354990 (1982-10-01), Martinengo et al.
patent: 4511525 (1985-04-01), Tsuge et al.
patent: 4628039 (1986-12-01), Mizutani et al.
patent: 4652276 (1987-03-01), Burden
patent: 4702869 (1987-10-01), Higuchi et al.
patent: 4764490 (1988-08-01), Yamakawa et al.
patent: 4777822 (1988-10-01), Uemura et al.
patent: 4855262 (1989-08-01), Richon et al.
patent: 4888310 (1989-12-01), Richon et al.
patent: 4892848 (1990-01-01), Yoshida et al.
patent: 4943401 (1990-07-01), Edler et al.
patent: 4971740 (1990-11-01), Nishio et al.
patent: 5017531 (1991-05-01), Ukai et al.
Quinn, G., J. Am. Ceram. Soc. 73:2374, 2383-84 (1990) no month.
Derwent Database, WPI Week 8043, J 55116671, Feb. 1979.

Affiliated with

Also associated with

Rating

Sintered material based on Si.sub.3 N.sub.4 and processes for it does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sintered material based on Si.sub.3 N.sub.4 and processes for it, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sintered material based on Si.sub.3 N.sub.4 and processes for it will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1782393