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New oxygen-permeable membrane  materials development and application
¸ÆîÑ¿óÐÍÑõ»¯Îï(ABO3−¦Ä)³ýÁË¿ÉÒÔÓÃ×÷Ñõ·ÖÀëĤÌṩ´¿ÑõÍ⣬ÁíÒ»¸ö·Ç³£ÓÐDZÁ¦µÄÓ¦Ó÷½ÏòÊÇ×÷Ϊ͸ÑõĤ·´Ó¦Æ÷£¬ÎªµÍ̼ÍéÌþµÄÑ¡ÔñÑõ»¯ÔÚÏßÌṩ´¿Ñõ¡£×÷Ϊһ¸öµäÐ͵ĸÆîÑ¿óÑõ»¯ÎSrCo0.8Fe0.2O3−¦ÄµÄ¸ß͸ÑõÄÜÁ¦Òѱ»½øÐÐÁ˹㷺µÄÑо¿¡£¾ÍĿǰÇé¿öÀ´¿´£¬½á¹¹µÄ²»Îȶ¨ÐÔʹËü»¹²»ÄܺܺõØÂú×㹤ҵ»¯µÄÒªÇó¡£
    ±¾ÎÄÔÚ×ܽáºÍʵÑéÊý¾ÝµÄ»ù´¡ÉÏÌá³öÁËÑ¡Ôñ¸ßÐÔÄܸÆîÑ¿óÐÍÑõ»¯Îï»ìºÏµ¼Ìå͸ÑõĤ²ÄÁϵIJßÂÔ,Ó¦Óô˲ßÂÔ¶Ô¼¸ÖÖ¸ÆîÑ¿óÐÍ͸ÑõĤ²ÄÁϵÄÐÔÄÜ×÷Á˺ÏÀíµÄ½âÊÍ,²¢ÔÚ´Ë»ù´¡ÉϲÉÓÃBa2+²¿·ÖÈ¡´úSr2+£¬Í¨¹ý¹ÌÏà·´Ó¦·¨³É¹¦¿ª·¢³öBa0.5Sr0.5Co0.8Fe0.2O3−¦Ä¸ÆîÑ¿óÐÍ»ìºÏµ¼Ìå²ÄÁÏ£¬²¢ÇÒÀûÓÃXÉäÏßÑÜÉäºÍɨÃè¹â¾µ¶ÔBa0.5Sr0.5Co0.8Fe0.2O3−¦ÄµÄ½á¹¹ºÍÉÕ½áÌØÐÔ½øÐÐÉîÈëµÄÑо¿¡£·¢ÏָòÄÁϲ»½ö¾ßÓÐÓÅÒìµÄÑõÉøÍ¸ÄÜÁ¦£¬ÆäÔÚ·´Ó¦ÖеÄÎȶ¨ÐÔÒ²Ã÷ÏÔÌáÉý¡£

    Perovskite oxides (ABO3−¦Ä) are of interest for attractive applications as oxygen-permeable membranes for air separation, and in membrane reactors for the selective oxidation of light hydrocarbons. As one of the typical perovskite oxide, the SrCo0.8Fe0.2O3−¦Ä oxide with attractive oxygen permeability had been studied extensively. Unfortunately, the poor structural stability of the SrCo0.8Fe0.2O3−¦Ä oxide limits seriously its practical applications.
    A series of methods for selecting perovskite - type oxides used as mixed - conducting membranes for oxygen separation were reviewed according to the literatures and experimental data. The oxygen permeability of several perovskite - type membranes was properly interpreted. Based on these strategies,
The substitution of Sr2+ in the SrCo0.8Fe0.2O3−¦Ä oxide by Ba2+ with a larger ionic radius, Ba0.5Sr0.5Co0.8Fe0.2O3−¦Ä oxide has been synthesized by the solid-state reaction method. The structural and sintering properties of the Ba0.5Sr0.5Co0.8Fe0.2O3−¦Ä oxide/ceramic were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM).Ba0.5Sr0.5Co0.8Fe0.2O3−¦Ä oxide has the high oxygen permeability, its structural stability was improved properly.
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ringzhu(½ð±Ò+2): ²»ºñµÀÍÛ ºÙºÙ 2011-05-27 20:02:43
Mally89(½ð±Ò+1): ... 2011-05-30 10:54:18
The development and application of a new oxygen-permeable membrane  material
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