新型钙钛矿ABO3型B位含铋混合导体透氧膜

来源 :科学通报 | 被引量 : 0次 | 上传用户:feijian06
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
研究与合成了系列新型的钙钛矿型B位铋掺杂混合导体透氧膜材料,对其结构与透氧性能进行了测定.发现BaBi_(0.2)Co_yFe_(0.8-y)O_(3-δ)(y≤0.4)及BaBi_xCo_(0.2)Fe_(0.8-x)O_(3-δ)(x=0.1~0.5 )都可以形成立方晶相的钙钛矿型复合氧化物.透氧测定表明此系列材料具有非常高的氧渗透能力.BaBi_(0.2)Co_(0.35)Fe_(0.45)O_(3-δ)导体膜,在膜片一端为空气氛另一端为氦气氛情况下,900℃时透氧量高达0.77 × 10~(-6) mol/(cm~2·s)以上,远远高于相同条件下其他的含铋透氧膜材料.并发现透氧量随着钴含量的增加而增加,而与铋含量无简单的关系.O_(2)-TPD测定表明,材料具有优良的氧吸附脱附可逆性.长时间透氧测定表明,BaBi_(0.2)Co_(0.35)Fe_(0.45)O_(3-δ)BaBi_(0.3)Co_(0.2)Fe_(0.5)O_(3-δ)导体膜在875℃下都具有较稳定的氧渗透行为. A series of novel perovskite-type B-doped bismuth-doped mixed-conductor oxygen-permeable membrane materials were studied and synthesized. Their structures and oxygen permeability were measured. BaBi_ (0.2) Co_yFe_ (0.8-y) O_ (3-δ) (y≤0.4) and BaBi_xCo_ (0.2) Fe_ (0.8-x) O_ (3-δ) x = 0.1 to 0.5) can form a cubic crystal perovskite-type composite oxide. Oxygen measurements show that this series of materials has a very high oxygen permeability. BaBi_ (0.2) Co_ (0.35) Fe_ (0.45) O_ (3-δ) Conductor film with oxygen concentration at 900 ℃ with an air atmosphere at one end of the film and helium atmosphere at the other end .77 × 10 ~ (-6) mol / (cm ~ 2 · s), which is much higher than that of other bismuth-containing oxygen-permeable membrane materials under the same conditions. And found that the amount of oxygen increases with the increase of cobalt content, but with no simple relationship between the content of bismuth. O_ (2) -TPD measurement showed that the material has excellent oxygen adsorption and desorption reversibility. The long time oxygen permeability measurements showed that the BaBi_ (0.2) Co_ (0.35) Fe_ (0.45) O_ (3-δ) BaBi_ (0.3) Co_ (0.2) Fe_ (0.5) O_ (3-δ) conductor film has a more stable oxygen permeation behavior at 875 ° C.
其他文献
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
研究了磷钨酸(H3PW12O40,简记为PW12) 及其钠盐(NaxH3-xPW12O40,简记为NaxH3-x,x=1~3)催化苯酚与苯乙烯的烷基化反应.NH3-TPD及吡啶热脱附结果表明:随着钠含量的增加,催化剂的
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
期刊
采用有效核势能近似(ECP)从头算方法,研究了羰基钴催化的氢甲酰化反应循环中的乙基迁移反应机理.在HF/LANL2DZ水平优化得到了反应基态势能面的反应物、过渡态和产物的几何构型,对反应位能剖面的
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
计算了4-溴查耳酮(PBC)的二阶非线性光学系数β,测量了其二次谐波产生(SHG)效率和截止吸收波长λcut-off,并研究了PBC的微观和宏观非线性效应之间的关系.结果表明,PBC有很强
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
期刊
猪笼草  猪笼草大多数生长在印度洋群岛、马达加斯加、斯里兰卡、印度尼西亚等潮湿热带森林里,我国广东、云南等省也有这种植物。猪笼草捕食全靠它奇特的叶子,其叶片中脉伸出