Introduction of traditional materials

Traditional materials, the so-called materials, refer to the substances used by human beings to make useful articles; Material is the material basis for human survival and development and an important pillar of human social civilization. New material refers to a recently developed or under development material with better performance than traditional material. Every major breakthrough in materials science and technology will lead to a revolution in production technology and greatly accelerate the process of social development. Historical stage: according to the materials used by human tools, it is divided into stone age, pottery age, bronze age, iron age and silicon age.