Investigation of Electronic Structure of Both Nickel Oxide and Metalloporous Cathode Materials by Methodes of High Resolution Electron Spectroscopy

The literature review analyzed the types and basic properties of cathode materials based on barium oxide, which are used for the production of nickel oxide and metalloporous cathodes. A model of the electronic structure of barium oxide was considered, which determines the emission properties of cathode materials. Analytical capabilities of electron spectroscopy methods, which are selected to study the electronic structure of cathode materials, were analyzed. These methods include Auger electron spectroscopy, a method of electron spectroscopy for chemical analysis, electron energy loss spectroscopy. The aim and task of the thesis has been formulated on the results of the literature review. In the experimental part of the thesis, methodology of experimental research, which provides a method of preparation of material samples for research and methods of analysis of materials by electron spectroscopy, was developed. A study was made to determine the surface composition of nickel oxide and matalloporous cathode materials with using Auger electron spectroscopy and electron spectroscopy for chemical analysis. The electronic states of barium and oxygen in the cathode materials were studied by method of high resolution electron spectroscopy for chemical analysis. Energy loss spectra in metalloporous cathodes were investigated and the electron density in volume and surface of cathode materials was determined.