氧化铝的机械化学改性及其在复合材料中的应用OA

As an important ceramic material,alumina is widely used in high-performance composites,but its inherent brittleness and poor interface compatibility limit performance improvement.In this study,a mechanochemical modification method was used to control the crystal structure,surface activity and dispersion of alumina through high-energy ball milling and surface activation treatment,and the interface bonding strength between alumina and the polymer matrix was significantly improved.The influence of modification process parameters on the physical and chemical properties of alumina was systematically studied,and the mechanism of mechanochemical action was revealed through XRD,SEM,FTIR and other characterization methods.When the modified alumina is applied to epoxy resin and polypropylene composites,its tensile strength and impact toughness are increased by 45%and 60%respectively,and the thermal stability is significantly improved.This research provides new ideas for the development of high-performance alumina composites and has important application value in electronic packaging,aerospace and other fields.