Process for the formation of a barrier layer on a surface of a glass object

US5431707A · kind A · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Sami Dick · Le Chesnay, FR
• Patrick Recourt · Marcoussis, FR
• Lahchen Ougarane

Key dates

• Filing date: Sep 2, 1993
• Grant date: Jul 11, 1995
• Expiry date: Sep 2, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2218/152
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

There is formed a silicon-base antimigration barrier layer by projection, on a hot surface of a glass object, in an unconfined ambient atmosphere from a gaseous mixture comprising neutral gas, a silicon precursor, typically a silane, between 10 and 60% of ammonia and preferably less than 5% oxygen, the ratio of the oxygen and silane contents being comprised between 0 and 4. It is useful particularly for the treatment of sodium-calcium glass receptacles to prevent migration of ions into liquids contained in the receptacles.