材料按其性能特征分为结构材料和功能材料两大类,其中前者趋向减少,后者日渐增加且增加速度相当快。这与尖端技术的飞速发展和材料本身的技术进步密切相关。功能材料的种类繁多,大致可分为金属材料、非金慝陶瓷材料和高分子材料三种。 Materials according to their performance characteristics are divided into two categories of structural materials and functional materials, of which the former tends to reduce the latter increasing and increasing very fast. This is closely related to the rapid development of cutting-edge technology and the technological progress of the material itself. A wide range of functional materials, can be roughly divided into metal materials, non-gold 慝 ceramic materials and polymer materials three.