The physical and chemical properties of graphite anode plate are described
Graphite anode plate, anode cylinder and graphite anode rod (also known as graphite positive plate and graphite positive rod) have physical properties of high temperature resistance, good electrical and thermal conductivity, easy machining, chemical properties, good chemical stability, acid and alkali corrosion resistance and low ash content. They are used for electrolyzing water solution to produce chlorine and caustic sodium, and electrolyzing salt solution to produce alkali; It can also be used for electroplating various metal and non-metallic carriers. For example, graphite anode plate can be used as a conductive anode for electrolytic salt solution to produce caustic soda. It can also be used for sewage treatment in chemical, electronic and textile industries.
Since the graphite anode plate is mainly composed of graphite, we can analyze the physical and chemical properties of graphite:
Insoluble in water and organic solvents: it is a crystalline mineral of carbonaceous elements, and its crystalline framework is hexagonal layered structure. The distance between each net layer is 3.40 Å, and the spacing of carbon atoms in the same net layer is 1.42 Å. It belongs to hexagonal system with complete lamellar cleavage. The cleavage surface is dominated by molecular bonds and has weak attraction to molecules, so its natural floatability is very good.
At room temperature, the chemical properties of elemental carbon are relatively stable and insoluble in dilute acid and alkali; Under different high temperatures, it reacts and burns with oxygen to produce carbon dioxide or carbon monoxide. In halogen, only fluorine can react directly with simple carbon: under heating, simple carbon is more easily oxidized by acid; under high temperatures, carbon can also react with many metals to form metal carbides. Carbon is reductive and can refine metals at high temperatures.
Graphite has delamination. The same layer is composed of many hexahedrons, and different layers are composed of another non covalent bond, so graphite is also stable because the same transverse plane is very stable. But graphite is slippery because its longitudinal plane is very unstable.
Graphite is a transition crystal with “layered structure”. The carbon atoms in the layer are covalently bonded to form a regular hexagonal network structure. The distance between layers is large, which is equivalent to the action of intermolecular force. Graphite has strong adhesion and conductivity.
Post time: Sep-09-2021