【摘要】 系统地研究了LaFeO₃-V₂O₅复合材料体系在测试SO₂时的稳定性,并对其敏感机理进行了分析。研究表明,当LaFeO₃和V₂O₅复合比例为1∶1时,500℃下对50×10^-6SO₂的响应平均值为116.32%,连续测试过程中空气电阻的漂移率仅为1.17%,原因在于两者复合后,溢流效应使得原本吸附在LaFeO₃表面的SO₂溢流至V₂O₅表面,催化转换为气态的SO₃脱附。更多还原

【Abstract】 The stability of LaFeO₃-V₂O₅ composite to SO₂ is systematically studied, and its sensitive mechanism is analyzed.The research shows that when the ratio of LaFeO₃ and V₂O₅ is 1∶1,the average response to 50×10^-6SO₂ at 500 ℃ is 116.32 %,and the drift rate of air resistance during continuous testing is only 1.17 %.The reason is that after the two are combined, SO₂ originally adsorbed on LaFeO₃ overflow to the surface of V₂O₅ and catalyze the conversion into gaseous SO₃ for desorption because of the overflow effect.更多还原