caa a22 4500 388021977 CHVBK 20180307124927.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1557/JMR.1998.0247 doi S0884291400044836 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0247 Direct current electrical degradation of iron-doped titania ceramics [Elektronische Daten] An anomalous increase of current was found in Fe-doped titania ceramics subjected to a constant field of 105 V/m. It is suggested that the space charge rises from blockage of O2(g) → O2−(s) ion transfer at the cathode. This leads to an increase of n-conductivity in the cathodic region and p-conductivity in the anodic region according to the specific defect equilibrium. This viewpoint was reinforced by two newly observed phenomena: (i) the I-V plot shows a linear feature at the initial stage, but it gradually becomes a rectifying feature with time; and (ii) an edge-located electrode shows lower current density and faster current saturation compared with a normal electrode. Copyright © Materials Research Society 1998 Sheng Jianxin Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Fukami Tatsuo Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Karasawa Junich Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Journal of Materials Research Cambridge University Press 13/7(1998-07), 1761-1764 0884-2914 13:7<1761 1998 13 JMR https://doi.org/10.1557/JMR.1998.0247 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0247 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sheng Jianxin Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Fukami Tatsuo Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Karasawa Junich Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/7(1998-07), 1761-1764 0884-2914 13:7<1761 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge