Electronic Structure of Tungsten and Some of its Borides, Carbides, Nitrides, and Oxides by X-Ray Electron Spectroscopy.

摘要

Results of an x-ray electron spectroscopic investigation of the core and valence electronic energy levels of tungsten and some of its borides, carbides, nitrides, and oxides are presented in this communication. This investigation stems from some of the recent interest in this laboratory dealing with studies of substoichiometric amorphous thin films of some transition metal oxides (2a) and of the catalytic behavior of tungsten carbide (2b). It was concluded in the WC investigation that electron density shifts from W to C. In addition, we found it interesting to observe the shifts in electron density upon addition of nonmetal substituents (varying in the number of p electrons) to the tungsten matrix. We have just studied this situation in the series of compounds W, WB, WC, WN, WO sub 2, and WO sub 3. (Author)