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X‐ray Photoelectron Spectroscopy Studies of Metallic Diborides
Author(s) -
Zdaniewski Wieslaw A.,
Brungard Nancy L.
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb05515.x
Subject(s) - electronegativity , x ray photoelectron spectroscopy , binding energy , stoichiometry , metal , ionic bonding , transition metal , materials science , boron , analytical chemistry (journal) , chemistry , inorganic chemistry , atomic physics , ion , metallurgy , nuclear magnetic resonance , biochemistry , physics , organic chemistry , chromatography , catalysis
The binding energies of core electrons in d ‐type stoichiometric diborides of several transition metals were measured by X‐ray photoelectron spectroscopy. Metal core lines in the diborides shifted either to higher or to lower binding energies compared with those appertaining to corresponding elemental states and varied with the metal. The shifts were < 0.6 eV. Carbides, oxides, and oxycarbides of variable stoichiometries were the major impurities detected in the diborides. The binding energy shifts showed a progressive change as the electronegativity difference between the and the metalloid (boron, carbon, nitrogen, oxygen) increased. This indicated that the bond in boro‐oxycarbides may be partially ionic.