Effects of ion beam surface modification on proton conductivity of BaCe0.9Y0.1O3-δ
Effects of surface modification on the electrical conductivity of proton conducting oxides (Yttrium doped BaCeO3), irradiated by 10 keV Ar+ions to a fluence of 1.0×10 18 ions/cm2 in room temperature, were investigated by means of ultraviolet-visible (UV-VIS) optical absorption, X-ray photoelectron spectroscopy (XPS), elastic recoil detection analysis (ERDA) and alternating current (AC) impedance measurements. UV-VIS and XPS analyses showed that oxygen vacancies and hydroxides formed on the irradiated specimen and that proton concentration increased on the surface by the ERDA. The electrical conductivity of the modified specimen became about one order of magnitude higher in the temperature range of 298-673 K. These results indicate that the increase of electrical conductivity may be caused by the increase of proton and electronic carriers formed by the interaction of oxygen vacancies and H2O or O2, respectively.
Ion beam surface modification AC impedance ERD Proton conductivity
Jae-Hwan Kim Bun Tsuchiya Shinji Nagata Tatsuo Shikama
Department of Quantum Science and Energy Engineering, Tohoku University, 6-6-04, Aramaki Aza Aoba Ao Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japa
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1182-1186
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）