中文摘要：

分别采用粉末冶金法和溶胶一凝胶法制备了高Nb—TiAl多孔合金载体及其钙钛矿型催化剂，并在模拟汽车尾气环境中研究了其气体催化性能。Ti-48A1—6Nb多孔合金骨架主要由a。和7两相构成，孔隙率达到了39．5％，且为近全开孔多孔合金。用其作为载体，成功与LaMnO3催化剂进行了复合，并在B位分别掺杂了Sr和Pd元素。其中，少量的贵金属Pd能部分取代B位的离子而进入到钙钛矿晶格，并占据B位，在很大程度上降低起燃温度点，提高其催化转化效率。

英文摘要：

In this work, Ti-48Al-6Nb porous alloys were fabricated by powder sintering and the structure and three-way catalytic property of a perovskite catalyst were evaluated. The skeletons of porous alloys consisted of α2 and γ phases, and the porosity was 39.5%. After successful compose with the LaMnO3 catalyst, elements Sr and Pd were doped into B site. In addition, a few Pd elements could replace the ion in B site and go into the perovskite lattice, resulting in reducing the ignition temperature and improving the catalytic conversion efficiency at great extent.