1, cement
Cement: powder hydraulic inorganic cementing material. Mud can be hardened in air or water after being mixed with water, and can firmly bond sand, stone and other materials together. For a long time, cement, as an important cementing material, has been widely used in civil construction, water conservancy, national defense and other projects.
2. Artificial graphite
Broadly speaking, all graphite materials obtained by high-temperature organic carbonization and graphitization can be called artificial graphite, such as carbon fiber, pyrolytic carbon, foamed graphite and so on. In a narrow sense, artificial graphite usually refers to a block solid material made of carbonaceous raw materials with low impurity content as aggregate and coal tar pitch as binder through batching, kneading, molding, carbonization and graphitization, such as graphite electrode and isostatic pressing graphite.
3. Special ceramics
Special ceramics refer to ceramics with special mechanical, physical or chemical properties, which are used in various modern industries and cutting-edge science and technology. The raw materials used and the required production technology have been greatly different and developed from ordinary ceramics, which are called "precision ceramics" in some countries. Recently, China materials experts agreed that it is better to call it "advanced ceramics". Special ceramics can be divided into structural ceramics, functional ceramics and tool ceramics according to their different performance characteristics and uses.
4. Synthetic rubber
Synthetic rubber, also known as synthetic elastomer, is a synthetic polymer with high elasticity and is one of the three major synthetic materials. Its output is only lower than that of synthetic resin (or plastic) and synthetic fiber. Classification methods are diverse, with a long history of development and broad research prospects.
5. Synthetic resin
Synthetic resin is a kind of synthetic high molecular weight polymer, which has two or more inherent characteristics of natural resin. Icublish t defines synthetic resin as an organic substance with unlimited molecular weight, usually a high molecular weight solid, semi-solid or pseudo-solid. When subjected to pressure, it tends to flow, usually with a softening or melting range, and is shell-shaped when it breaks.