Ozygen stoichiometry and transport properties of cerium niobate
CeNbO4+δ has been synthesized by both solid state and wet chemical routes and characterized with respect to electrical conductivity and oxygen stoichiometry between 900℃ and 1100℃ and pO2 from 1 bar to 0.002 bar. CeNbO4+δ was shown to exhibit mixed conductivity with oxygen interstitials and electron holes being the major charge carriers. The activation energies for chemical diffusion (Dchem and surface exchange coefficient (Kchem), determined by electrical relaxation measurements, were 55.8 ± 3.7 and 198 ± 20 kJ/mol, respectively. Finally, both Dchem and Kchem were reduced with decreasing partial pressure of oxygen.
CeNbO4 Mized conductivity Ozygen diffusion Ozygen stoichiometry
Fride Vullum Tor Grande
Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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
1061-1065
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）