Process for production of chemically prestressed glass

Details Process for production of chemically prestressed glass Process for production of chemically prestressed glass

1997-04-24

1998-12-08

Chin, Peter

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 3013, 65114, 501 54, 501 57, C03C 1500, C03B 2700

Patent

active

058462805

ABSTRACT:
The process for producing a chemically prestressed glass of very high surface quality includes subjecting an Li.sub.2 O-free starting glass from the SiO.sub.2 -Al.sub.2 O.sub.3 -M.sub.2 O-MO system which also contains TiO.sub.2, CeO.sub.2 and F.sub.2 to chemical ion exchange by immersing it in a potassium salt bath at a temperature between 350.degree. C. and 550.degree. C. and at a residence time of between 0.5 and 20 hours to form the chemically prestressed glass. In a preferred embodiment of the process, the potassium salt bath contains a potassium nitrate melt and the glass is polished after prestressing. The chemically prestressed glass is particularly useful for making hard disks.

REFERENCES:
patent: 4671814 (1987-06-01), Aratani et al.
patent: 5057134 (1991-10-01), Suzuki et al.
patent: 5279851 (1994-01-01), Minosou et al.
patent: 5561089 (1996-10-01), Ishizaki et al.

Affiliated with

Also associated with

Rating

Process for production of chemically prestressed glass 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 production of chemically prestressed glass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for production of chemically prestressed glass will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-172612