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用快速凝固工艺可获得特殊性能的细小铝粉,将这种铝粉添加到塑料中,就使塑料变成了能导电和导热的传导复合材料。在塑料中添加金属填料不是新的设想,然而,细薄铝粉片作为填料比传统上选择的铝粉有很多优点。细薄铝粉片的纵厚比比铝粉的纵厚比大,前者为40:1,后者为3:1。纵厚比大时,在较少量铝粉的聚合物基体内能建立起传导网络,并且比传统的铝粉聚合物复合材料有更好的传导性。用细薄铝粉片制成的传导塑料复合材料具有金属的性能,而且工艺简单,可进行任何造型,成本费用不高。传导塑料的两个主要应用领域是作电磁干扰屏蔽材料和导热材料。本文讨论了用快速凝固技术生产细薄粉片,传导复合材料对填料的要求,这种复合材料的生产工艺以及用细薄铝粉片填充的复合材料的两种应用领域。
With the rapid solidification process can get special performance of small aluminum powder, the aluminum powder added to the plastic, the plastic into a conductive and conductive conductive composite material. Adding a metal filler to plastic is not a new idea, however, thin aluminum flakes have many advantages as filler in traditionally selected aluminum powder. The aspect ratio of the thin aluminum flake is larger than the aspect ratio of the aluminum flake, the former being 40: 1 and the latter being 3: 1. When the aspect ratio is large, a conductive network can be established in the polymer matrix of lesser amounts of aluminum powder and have better conductivity than conventional aluminum powder polymer composites. Conductive plastic composites made of thin aluminum flakes have the properties of metal, and the process is simple, can be any shape, the cost is not expensive. The two main areas of application of conductive plastic are EMI shielding and heat-conducting materials. This article discusses two areas of application for the production of thin flakes using rapid solidification techniques, the requirement of conductive composites for the filler, the production process for the composite, and the composite filled with thin aluminum flakes.