等离子喷涂致密La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)透氧膜的氧传输行为  

Oxygen Transportation Behavior of Dense La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) Oxygen Transport Membrane Prepared by Plasma Spraying Technologies

作　　者：牛少鹏 周克崧[1,2] 徐丽萍 邓畅光 毛杰 曾威 Niu Shaopeng;Zhou Kesong;Xu Liping;Deng Changguang;MaO Jie;Zeng Wei(South China University of Technology,Guangzhou 510640,China;The Key Lab of Guangdong for Modern Surface Engineering Technology,National Engineering Laboratory for Modern Materials Surface Engineering Technology,Guangdong Institute of New Materials,Guangzhou 510651,China)

机构地区：[1]华南理工大学,广东广州510640 [2]广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室,广东广州510651

出　　处：《稀有金属材料与工程》2018年第12期3697-3702,共6页Rare Metal Materials and Engineering

基　　金：广州市基金(201707010455)

摘　　要：采用超音速等离子喷涂(SAPS)和等离子物理气相沉积方法(PS-PVD)制备了结构致密的钙钛矿型(ABO_3)La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)(LSCF)透氧膜。利用氧程序升温脱附(O2-TPD)、XPS等手段,比较了2种膜在200～900℃间氧物种在表面及体相中的传递变化情况。O2-TPD结果显示:SAPS膜的物理吸附氧脱附量、化学吸附氧脱附量和晶格氧脱附量分别超过PS-PVD膜的2倍、3倍和6倍;而XPS结果显示:SAPS膜表面吸附氧与晶格氧O1s峰面积比也高于PS-PVD膜。以上结果表明SAPS膜对氧具有更好的吸附及解离能力、更多的本征氧空位及更高的空位生成能力。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.

关 键 词：超音速等离子喷涂 低压等离子物理气相沉积 透氧膜 氧传输行为 

分 类 号：TB34[一般工业技术—材料科学与工程]