The surface reactivity of many nonblack fillers generally precludes strong bonding with this type of matrix . 许多非碳黑填料的表面反应性一般阻碍与该种基质形成牢固的粘结。
Powders , especially ultra - fine powders , which have many advantages , such as fine particle size , large specific surface , high surface reactivity , are widely used 粉体特别是超细粉体,因具有粒子细,比表面积大,表面活性高等特点而得到广泛应用。