EVAPORATION OF TUNGSTEN-OXIDES - A MASS-SPECTROMETRIC STUDY OF THE VAPOR CONTENTS

Authors
AZENS A KITENBERGS M KANDERS U
Citation
A. Azens et al., EVAPORATION OF TUNGSTEN-OXIDES - A MASS-SPECTROMETRIC STUDY OF THE VAPOR CONTENTS, Vacuum, 46(7), 1995, pp. 745-747
Citations number
9
Categorie Soggetti
Physics, Applied
Journal title
Vacuum → ACNP
ISSN journal
0042207X
Volume
46
Issue
7
Year of publication
1995
Pages
745 - 747
Database
ISI
SICI code
0042-207X(1995)46:7<745:EOT-AM>2.0.ZU;2-2
Abstract
The evaporation of bulk oxides of WO2 and WO3 and oxidised tungsten su rfaces (metallic tungsten heated in an oxygen atmosphere) have been st udied by the means of mass-spectrometry. The principal constituents of the vapour are found to be molecules of WO2, WO3, W2O6 and W3O9. Thes e results differ from earlier reports, where the presence of molecules smaller than W3O9 in the mass-spectrum was interpreted as an artifact due to electron impact dissociation of larger polymers.