关键词: 金属丝网, 电泳沉积, La_0.8Sr_0.2MnO₃, 催化燃烧

Abstract: A well-adhered and uniform Al₂O₃/Al layer with only 0.5wt% lost after 30min vibration was formed on the 316L wire mesh surface after electrophoretic deposition and thermal treatment. The effects of concentration of additives, the way of applied voltage, temperature of thermal treatment on the binding strength of surface layer were investigated. In addition, La_0.8Sr_0.2MnO₃ obtained from the method of co-deposition were wash-coated onto the Al₂O₃/Al-wire mesh. The wire-mesh catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Brunauer-Emmett-Teller (BET). The results show that the La_0.8Sr_0.2MnO₃ is combined strongly with wire mesh and only lost 5.0wt% after 30min vibration, and its BET surface area reaches 119.4m2/g when mixed with gamma-Al₂O₃. Then the wire-mesh catalysts were applied for catalytic combustion of toluene, the La_0.8Sr_0.2MnO₃ coated onto wire mesh shows good activity, and the toluene can be cleared up at 400℃ in high space velocity and high concentration condition.

Key words: metal wire mesh, electrophoretic deposition, La_0.8Sr_0.2MnO₃, catalytic combustion