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在高温氧化处理不同时间的金属载体箔片上涂覆MgAl2O4/Al2O3过渡涂层,利用TG—DSC,XRD,SEM,BET和超声振动等分析测试技术,对载体和涂层的微观结构与表面特性进行研究。结果表明,在950℃下高温氧化5 h。箔片表面生成板状Al2O3晶须,有利于增强涂层与箔片的附着力。在载体表面涂覆一层MgAl2O4/Al2O3过渡涂层,有助于提高活性组分与金属载体的结合力,可以获得高结合强度的涂层结构,促使活性元素高度分散。
The microstructure and surface properties of the carrier and coating were characterized by TG-DSC, XRD, SEM, BET and ultrasonic vibrational analysis. The microstructure and surface properties of MgAl2O4 / Al2O3 transitional coating were coated on the metal foil with different temperature at high temperature. the study. The results show that the high temperature oxidation at 950 ℃ for 5 h. Foil surface to generate platelet Al2O3 whiskers, help to enhance the coating and foil adhesion. Applying a layer of MgAl2O4 / Al2O3 transition coating on the surface of the carrier helps to improve the bonding strength between the active component and the metal carrier, and can obtain a coating structure with high bonding strength and promote highly dispersed active elements.