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复合掺杂钛酸锶新型阳极材料的制备与性能研究

Preparation and properties of complex doped SrTiO3 anode

中文摘要英文摘要

作为一种高转化率、低污染的发电系统,固体氧化物燃料电池毋庸置疑将在新时代得到广泛应用。本文采用固相法研究了一种新型钙钛矿结构阳极材料:镧、镓和锰复合掺杂的钛酸锶,通过复合掺杂,以期进一步提高材料的电性能。粉末在1060℃合成,经过球磨、烘干和过筛后,先干压成型(170MPa)再等静压成型(180MPa)。试样装入密闭的坩埚,利用石墨造成还原气氛,于1360℃烧成2h。采用X射线衍射分析和扫描电镜分析材料结构,用四电极法测电导率,结果表明材料烧结后形成单一的钙钛矿结构,为离子电子混合导体,电导率在800℃达60.9 S/cm。

Solid oxide fuel cells (SOFCs) as a power generation system will undoubtedly find widespread use in this new millennium due to its many advantages over conversion systems in terms of high efficiency and low pollution. An amazing perovskite anode is investigated with La substitution in A-site and Ga and Mn substitution in B-site to improve its electrical properties. The powders are fabricated by solid-state reaction at 1060℃ for 2 h. After ball milling, drying and sieving, bars are shaped at 170 MPa, followed by isostatic pressing at 180 MPa. Samples are sealed into a crucible with carbon inside to create reducing atmospheres. They are sintered at 1360℃ for 2 h. The structure of this material was characterized by means of XRD and SEM, and the electrical performance was studied through a DC 4-probe method. The results show that the samples are mixed oxygen-ionic/electronic conductors and have a single perovskite phase. The conductivity reached 60.9 S/cm tested at 800℃.

代娜、彭珍珍、尹自光、郭瑞松

能源动力工业经济材料科学

固体氧化物燃料电池,阳极材料,混合导体,钙钛矿

solid oxide fuel cell,anode material,mixed oxygen-ionic/electronic conductors, perovskite

代娜,彭珍珍,尹自光,郭瑞松.复合掺杂钛酸锶新型阳极材料的制备与性能研究[EB/OL].(2007-05-18)[2025-08-23].http://www.paper.edu.cn/releasepaper/content/200705-306.点此复制

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