Oxygen Transportation Behavior of Dense La0.6Sr0.4Co0.2Fe0.8O3-δ Oxygen Transport Membrane Prepared by Plasma Spraying Technologies [等离子喷涂致密La0.6Sr0.4Co0.2Fe0.8O3-δ透氧膜的氧传输行为]

作者：Niu S.; Zhou K.^*; Xu L.; Deng C.; Mao J.; Zeng W.

来源：Rare Metal Materials and Engineering, 2018, 47(12): 3697-3702.

• Oxygen transport behavior
• Oxygen transport membrane
• PS-PVD
• SAPS

The gas-tight perovskite La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) oxygen transport membranes were prepared by supersonic air-gas plasma spraying (SAPS) and low pressure plasma spraying-physical vapor deposition (PS-PVD). The surface exchange and bulk diffusion of the oxygen species of the two membranes were compared by O2-TPD and XPS. The O2-TPD results show that the desorptions of the physical, chemical adsorbed oxygen and the lattic oxygen of the SAPS membrane were 2, 3 and 6 times respectively more than those of the PS-PVD membrane. The XPS results show a higher proportion of adsorbed oxygen of the SAPS membrane than that of the PS-PVD membrane. All the above results demonstrate that the SAPS membrane has better adsorption and dissociation abilities on oxygen, and also possesses more intrinsic oxygen vacancies and higher capacity of vacancy formation.

• 单位
  华南理工大学