AVOIDANCE OF La_2Zr_2O_7 FORMATION ON CO-SINTERING THE (La_(0.8)Sr_(0.2))_(1-x)MnO_3/YSZ SYSTEM

机译：（La_（0.8）Sr_（0.2））_（1-x）MnO_3 / YSZ体系共烧结时避免La_2Zr_2O_7形成

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The chemical compatibility of 8 mol% YSZ and (La_(0.8)Sr_(0.2))_(1-x)MnO_3 (LSM) has been investigated at temperatures in excess of 1300℃. Stoichiometric LSM (x=0) reacted readily with YSZ producing the undesired La_2Zr_2O_7 (LZO) pyrochlore phase at 1300℃. An A-site deficiency of x=0.03 reduced the amount of pyrochlore present, and increasing the LSM particle size from 0.3 μm to 2.5 μm removed any visible LZO peaks in the XRD analysis. An A-site deficiency of x=0.05 was found to be adequate to prevent the formation of the La_2Zr_2O_7 (LZO) pyrochlore at temperatures up to 1400℃ within the detection limits of X-ray diffraction. Increased A-site deficiency in the LSM resulted in improved adhesion between cathode and the electrolyte.

机译：研究了在1300℃以上温度下8 mol％YSZ和（La_（0.8）Sr_（0.2））_（1-x）MnO_3（LSM）的化学相容性。化学计量的LSM（x = 0）与YSZ容易发生反应，在1300℃下生成不希望的La_2Zr_2O_7（LZO）烧绿石相。 X = 0.03的A位缺陷减少了存在的烧绿石的量，并将LSM粒径从0.3μm增加到2.5μm消除了XRD分析中任何可见的LZO峰。在X射线衍射的检出限内，在高达1400℃的温度下，x位置的A位缺陷x = 0.05足以阻止La_2Zr_2O_7（LZO）烧绿石的形成。 LSM中A位缺陷的增加导致阴极和电解质之间的粘附性提高。

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《Proceedings vol.2005-07; International Symposium on Solid Oxide Fuel Cells IX(SOFC-IX) vol.2: Materials; 20050515-20; Quebec City(CA)》|2005年|P.1571-1577|共7页
会议地点 Quebec City(CA)
作者
Fran G. E. Jones; P. A. Connor; John T. S. Irvine;
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University of St Andrews, School of Chemistry St Andrews, KY16 9ST, Scotland, UK;

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原文格式 PDF
正文语种 eng
中图分类化学电源、电池、燃料电池;
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AVOIDANCE OF La_2Zr_2O_7 FORMATION ON CO-SINTERING THE (La_(0.8)Sr_(0.2))_(1-x)MnO_3/YSZ SYSTEM

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