The absorption behavior of lattice oxygen for Ce0.8Y0.2O2-δ(YDC) crystal was investigated. Combined with TG-DSC, XRD, Raman and XPS characterization, lattice oxygen absorption occurs at intermediate temperature(from ...The absorption behavior of lattice oxygen for Ce0.8Y0.2O2-δ(YDC) crystal was investigated. Combined with TG-DSC, XRD, Raman and XPS characterization, lattice oxygen absorption occurs at intermediate temperature(from 500 to 800 ℃),which is related to the oxygen vacancies consumption,and no phase change is observed in this process. In electric conductivity relaxation(ECR) experiment, prolonged oxygen diffusion process is observed above 600 ℃, which may be caused by oxygen absorption process. And through ECR experiments,the bulk diffusion coefficient Dchemand surface exchange coefficient Kexfor YDC dense sample are measured as 6,5×10-5-2×10-4cm2/s and Kex=2×10-4-9×10-4cm/s at intermediate temperature range.展开更多
基金supported by the National Natural Science Foundation of China(51472156,51702206)
文摘The absorption behavior of lattice oxygen for Ce0.8Y0.2O2-δ(YDC) crystal was investigated. Combined with TG-DSC, XRD, Raman and XPS characterization, lattice oxygen absorption occurs at intermediate temperature(from 500 to 800 ℃),which is related to the oxygen vacancies consumption,and no phase change is observed in this process. In electric conductivity relaxation(ECR) experiment, prolonged oxygen diffusion process is observed above 600 ℃, which may be caused by oxygen absorption process. And through ECR experiments,the bulk diffusion coefficient Dchemand surface exchange coefficient Kexfor YDC dense sample are measured as 6,5×10-5-2×10-4cm2/s and Kex=2×10-4-9×10-4cm/s at intermediate temperature range.
