Non-evaporable ternary gettering alloy and method of use for the sorption of water, water vapor and other gases

US4312669A · kind A · utility

Assignee

• SAES GETTERS S.P.A. · IT

Inventors

• Claudio Boffito · Rho, IT
• Aldo Barosi · Milano, IT
• Alessandro Figini · Milano, IT

Key dates

• Filing date: Jan 24, 1980
• Grant date: Jan 26, 1982
• Expiry date: Jan 24, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S420/901
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A non-evaporable getter alloy is provided which can be used in a process for the sorption of gas from a closed vessel comprising the step of: PA0 introducing into the vessel a non-evaporable ternary gettering alloy whose composition in weight percent when plotted on a ternary composition diagram in weight percent Zr, weight percent V and weight percent Fe lies with a polygon having as its corners the points defined by: PA0 (a) 75% Zr-20% V-5% Fe PA0 (b) 45% Zr-20% V-35% Fe PA0 (c) 45% Zr-50% V-5% Fe such alloys can sorb water vapor without the release of H.sub.2 between 200.degree.-350.degree. C. and can be used in a wide temperature range for the sorption of other gases. They can also be activated in short times at relatively low temperatures, to be used as a getter at room temperature.