Gettering of carbon dioxide by erbium thin films

Conference · Tue Jan 01 00:00:00 EST 1980

OSTI ID:5455824

Mehrhoff, T K

The interaction of carbon dioxide and erbium thin films is characterized at 300 to 900/sup 0/C and 5 x 10/sup -7/ torr. Temperature ramp experiments with thin erbium films indicated a significant reaction above 300/sup 0/C, preceded by desorption of water vapor, hydrogen and nitrogen and/or carbon monoxide from the film surface. The sticking coefficients were plotted as a function of Langmuirs of carbon dioxide exposure. Between 400 and 600/sup 0/C, the length of the exposure was found to be more important than the temperature of the exposure in determining the sticking coefficient. Some evolution of carbon monoxide was noted particularly in the 400 to 500/sup 0/C region. An 80% conversion of carbon dioxide to carbon monoxide was measured at 500/sup 0/C. The film pumping speeds were compared with published vapor pressure data for erbium. This comparison indicated that a significant portion of the pumping action observed at temperatures of 800/sup 0/C and above was due to evaporation of erbium metal.

• Research Organization: General Electric Co., St. Petersburg, FL (USA). Neutron Devices Dept.
• DOE Contract Number: AC04-76DP00656
• OSTI ID: 5455824
• Report Number(s): GEPP-OP-482; CONF-800538-1; TRN: 80-009533
• Resource Relation: Conference: ACS meeting-in-miniature, Tampa, FL, USA, 8 May 1980
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON DIOXIDE
CHEMICAL REACTIONS
ERBIUM
SORPTIVE PROPERTIES
ADSORPTION
FILMS
GETTERING
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
RARE EARTHS
SORPTION
SURFACE PROPERTIES
400201* - Chemical & Physicochemical Properties