Process for surface conversion of vitreous silica to cristobalit

Details Process for surface conversion of vitreous silica to cristobalit Process for surface conversion of vitreous silica to cristobalit

1981-10-30

1984-01-31

Childs, Sadie L.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

Surface modified glass

65 301, 65 33, 427 93, 427255, 428446, B32B 1700

Patent

active

044290098

ABSTRACT:
The specification discloses a process for converting the surface layer of a body of vitreous silica to the more stable crystalline form of silica known as cristobalite. The surface of the body of vitreous silica is exposed to a gas phase reactive atmosphere comprising atomic iodine at a predetermined elevated temperature for a predetermined period of time to convert the surface layer of the vitreous silica to polycrystalline cristobalite and thus passivate and enhance the stability of the treated surface. The disclosed process is particularly useful for forming improved crucibles, such as those used in crystal growth from a melt.

REFERENCES:
patent: 3047438 (1962-07-01), Marinace
patent: 3692571 (1972-09-01), Colton et al.
patent: 3772134 (1973-11-01), Rau
patent: 3837825 (1974-09-01), Loxley et al.
patent: 4261753 (1981-04-01), Holcombe et al.
patent: 4279654 (1981-07-01), Yajima et al.
patent: 4338111 (1982-07-01), Edahiro et al.

Affiliated with

Also associated with

Rating

Process for surface conversion of vitreous silica to cristobalit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for surface conversion of vitreous silica to cristobalit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for surface conversion of vitreous silica to cristobalit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2345726