XPS analysis of Ni and oxygen in single-sintered SrTiO3 multifunction ceramic

Abstract

Abstract: XPS analyses have been performed to investigate the chemical conditions of Ni and oxygen on grain surfaces in single-sintered SrTiO3 capacitor-varistor ceramic doped with Nb2O5 and NiO. It is ascertained that Ni is in form of Ni2+ ions, which substitute for Ti4+ ions on grain surfaces during the oxidizing annealing. Moreover, it is confirmed that three kinds of chemically adsorbed oxygen such as O2-, O- and O-2(-) are formed on grain surfaces. It is proposed that these behaviors contribute greatly to the generation of multiple types of grain boundary acceptor states in the ceramic.

Key words:

Qing XU, Wen CHEN, Runzhang YUAN. XPS analysis of Ni and oxygen in single-sintered SrTiO3 multifunction ceramic[J]. J Mater Sci Technol, 2001, 17(05): 535-537.

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XPS analysis of Ni and oxygen in single-sintered SrTiO3 multifunction ceramic

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