Ni掺杂对Ba_(0.5)Sr_(0.5)FeO_(3-δ)混合导体透氧材料结构及性能的影响  

Effects of Ni-doping on structure and properties of Ba_(0.5)Sr_(0.5)FeO_(3-δ)

作　　者：钱建峰[1] 张广儒[1] 刘郑堃[1] 董学良[1] 金万勤[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第2期30-34,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB623406);国家自然科学基金资助项目(20990222,21006047)

摘　　要：采用乙二胺四乙酸(EDTA)-柠檬酸配位法制备具有钙钛矿结构的Ba0.5Sr0.5Fe1-xNixO3-δ(x=0、0.03、0.05、0.07和0.1)混合导体氧化物,考察Ni掺杂量对材料结构与性能的影响。借助于X线衍射仪(XRD)、扫描电子显微镜(SEM)和氧渗透性能分析,对试样的相组成、微观形貌、热膨胀行为以及氧渗透性能进行测试与表征。结果表明:少量Ni的掺杂可以提高试样的透氧性能,当Ni的掺杂量较低(x<0.07)时,试样为单一的钙钛矿相,具有较好的氧渗透性能及稳定性。当Ni掺杂量较高(x≥0.1)时,试样中出现第二相,且氧渗透性能随第二相的出现而大幅降低。Mixed oxygen ionic and electronic conducting oxides of Ba0.5Sr0.5Fe1-xNixO3-δ（x=0,0.03,0.05,0.07,0.1） were synthesized via a combined ethylenediaminetetraacetic acid（EDTA）-citrate complexing route.The effects of Ni-doping on structure and properties of Ba0.5Sr0.5FeO3-δ were investigated.The phase composition,morphology,thermal expansion,and oxygen permeability were analyzed by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,thermal expansion technique,and homemade gas measurement device.Results showed that only perovskite-type structure existed when x was less than 0.07,the membrane had desirable oxygen permeability and stability.However,the oxygen permeability was rapidly decreased because of the generation of second phase when x was more than 0.1.

关 键 词：透氧材料 钙钛矿 混合导体 氧分离 

分 类 号：TQ174[化学工程—陶瓷工业]