Low expansion transparent crystallized glass-ceramic

Details Low expansion transparent crystallized glass-ceramic Low expansion transparent crystallized glass-ceramic

1993-03-18

1994-08-09

Group, Karl

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 7, 501 69, C03C 1014

Patent

active

053366433

ABSTRACT:
A low expansion crystallized glass-ceramic which has a coefficient of thermal expansion (.alpha..times.10.sup.-7 /.degree. C.) within the range of from -10 to +10, has a remarkably reduced variation in the coefficient of thermal expansion accompanied by variation in heat treatment conditions, has an excellent optical homogeniety owing to reduced melting temperature in the base glass and has an improved transparency is obtained by restricting the ratio in weight of Al.sub.2 O.sub.3 to (SiO.sub.2 +P.sub.2 O.sub.5) within the range of 0.38 and 0.50 and adding MgO, BaO and ZnO of specific content ranges as essential ingredients in a base glass of a SiO.sub.2 -Al.sub.2 O.sub.3 -Li.sub.2 O system containing P.sub.2 O.sub.5 as an optional ingredient and TiO.sub.2 and ZrO.sub.2 as nucleating agents.

REFERENCES:
patent: 4093468 (1978-06-01), Boitel et al.
patent: 5070045 (1991-12-01), Comte et al.
patent: 5179045 (1993-01-01), Aitken et al.

Affiliated with

Also associated with

Rating

Low expansion transparent crystallized glass-ceramic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low expansion transparent crystallized glass-ceramic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low expansion transparent crystallized glass-ceramic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-215966