Accession Number:

AD0617496

Title:

THE CHEMISORPTION OF NITROGEN ON POLYCRYSTALLINE TUNGSTEN WIRES,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) RADIO AND ELECTRICAL ENGINEERING DIV

Personal Author(s):

Report Date:

1964-12-14

Pagination or Media Count:

16.0

Abstract:

Desorption spectra were obtained for successively increasing amounts of nitrogen adsorbed on three polycrystalline tungsten wires at room temperature. Two beta phases were desorbed, beta-1 with first-order kinetics and an activation energy of 73 kcalmole and beta-2 with second-order kinetics and an activation energy of 75 kcalmole. Surface impurities such as carbon or thorium reduced the size of the beta-1 phase. Mass spectrometric evidence showed that the small alpha phase was adsorbed as molecules, and the beta-1 and beta-2 phases were adsorbed as atoms. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE