Transport Mechanisms and Defect Structures of the System ¥á-Fe2O3-CoO

[摘要] The electrical conductivity of the system �? -Fe2O3-CoO was measured in the temperature range 200-1000�? and PO2 range 10-7�?2 �? 10-1 atm. Possible defect models were suggested on the basis of conductivity data, which were measured as a function of temperature and of oxygen partial pressure. The observed activation energies were 0.50 eV and 1.01 eV in the low- and high-temperature regions, respectively. The observed conductivity dependences on PO2 were �? �? PO2-1/6 in the PO2 range 10-7-10-4 atm and ヲメ PO2-1/4 at PO2`s of 10-4-2 �? 10-1 atm at temperatures from 300-1000�?. An extrinsic electron conduction due to an Vo defect and an intrinsic electron conduction due to an Fei` defect were suggested at different temperature and oxygen partial pressure regions, respectively.

[学科分类] 化学（综合）