Compositions: coating or plastic – Coating or plastic compositions – Marking
Patent
1976-10-08
1977-11-08
Douglas, Winston A.
Compositions: coating or plastic
Coating or plastic compositions
Marking
106 398, 106 52, C03C 322, C03C 304
Patent
active
040574342
ABSTRACT:
This invention relates to the manufacture of highly-crystalline, opaque glass-ceramic articles, wherein the primary crystal phase is a beta-spodumene solid solution, which exhibit coefficients of thermal expansion (25.degree.-700.degree. C.) less than about 15 .times. 10.sup.-7 /.degree. C. and, preferably, less than 10 .times. 10.sup.-7 /.degree. C., and wherein transmittances to infra-red radiations as great as 60% have been measured at a wavelength of 3.5 microns in samples having thicknesses of about 4.25 mm. Such articles have compositions circumscribed within a narrow field of the Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 system nucleated with TiO.sub.2 which contain ZnO as the principal modifier ion and are essentially free from the alkaline earth metal oxides, alkali metal oxides other than Li.sub.2 O, and ZrO.sub.2.
REFERENCES:
patent: 3625718 (1971-12-01), Petticrew
patent: 3841950 (1974-10-01), Planchock et al.
patent: 3856497 (1974-12-01), Hummel
Bell Mark
Corning Glass Works
Douglas Winston A.
Janes Jr. Clinton S.
Patty, Jr. Clarence R.
LandOfFree
Opaque infra-red transmitting glass-ceramic articles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Opaque infra-red transmitting glass-ceramic articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Opaque infra-red transmitting glass-ceramic articles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-228038