稀土元素由于它们特殊的电子结构和许多有趣的物理化学性质,在各个部门得到越来越广泛的应用。目前在催化、合成领域中,稀土用量占世界总需要的约三分之一。同样稀土在新型气敏材料的开发和对现有材料气敏性能的改进起着重要的作用。 稀土在气敏材料中可以不同的方式得到应用。首先具有ABO_3钙钛矿型结构的稀土复合氧化物是七十年代新开发的气敏 Due to their special electronic structure and many interesting physicochemical properties, rare earth elements are widely used in various departments. At present, in the field of catalysis and synthesis, the amount of rare earths accounts for about one third of the total world needs. The same rare earth in the development of new gas-sensitive materials and gas materials to improve the existing material plays an important role. Rare earths can be used in different ways in gas-sensitive materials. First, the rare earth composite oxide with ABO_3 perovskite structure is the newly developed gas-sensing