THE KINETICS OF SRO ON MO BY FIELD ELECTRON MICROSCOPY
Abstract
The similarities in the SrO-W and SrO-Mo systems are: (1) The spreading of SrO on Mo is apparently the same type as SrO on W, showing no boundaries; (2) Above 1100 K, a pattern corresponding to the basic molybdate is obtained; (3) Between 1135 and 1400K a stable state forms which may be identified as the normal molybdate; (4) In going from the basic to the normal molybdate, the average work function passes through a minimumAND THERE IS AN INVERSION IN SYMMETRY OF THE (111) emission pattern; and (5) Above 1400K, decomposition resulted in a relatively short period of time and patterns identifiable with oxygen on Mo were obtained. Some differences between the two systems are: (1) Spreading of SrO on Mo occurs at temperatures approximately 200K higher than for SrO on W; (2) The basic molybdate shows clusters on the (111) region (These clusters persist until the work function minimum is passed in the basic to normal molybdate sequence); (3) The inversion in symmetry of the (111) emission is not as rapid as in the SrO-W system (A more pronounced symmetry change occurs in the (100) emission; and (4) Apparently the normal molybdate is not stable for long periods of time above 1300K. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 22, 1961
- Accession Number
- AD0255511
Entities
People
- D.r. Morgan
- E.a. Coomes
Organizations
- University of Notre Dame