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SURFACE SEGREGATION OF BA IN MGO

Abstract:

Surface segregation of Ba in doped polycrystalline and single crystal MgO has been studied by XPS. There is little variation in surface coverage of Ba over a range of bulk doping levels from 7 to 7000 ppm in ceramic pellets equilibrated at 1630 K. This remarkable behaviour is shown to be consistent with surface coverage calculated from heats of segregation derived from ionic model simulations of the surface if due account is taken of the strong variation of the segregation energy with coverag...

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Publication status:
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Journal:
SURFACE SCIENCE More from this journal
Volume:
208
Issue:
3
Pages:
267-284
Publication date:
1989-02-01
DOI:
ISSN:
0039-6028
Language:
English
Pubs id:
pubs:43251
UUID:
uuid:1cf23d68-87d6-4623-8ee8-3ef35a2c4763
Local pid:
pubs:43251
Source identifiers:
43251
Deposit date:
2012-12-19

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