Graphite deep processing technology refers to the methods of enhancing the properties and application range of graphite materials through physical, chemical, and mechanical means. Here are some key graphite deep processing technologies:
1.Graphene Preparation Technology:
Mechanical Exfoliation: Using tape or ultrasonic methods to peel graphite layer by layer to obtain single-layer or few-layer graphene.
Chemical Vapor Deposition (CVD): Depositing graphene on a metal substrate through gas-phase chemical reactions at high temperatures.
Oxidation-Reduction Method: Oxidizing natural graphite to form graphite oxide, then chemically reducing it to obtain graphene.
2.Expandable Graphite Production Technology:
Treating natural graphite with strong oxidizers to form intercalation compounds, then undergoing high-temperature thermal treatment to expand it into expandable graphite. Expandable graphite has a large specific surface area and excellent adsorption properties, widely used in environmental management and as an adsorption material.
3.High-Purity Graphite Preparation Technology:
Removing impurities from graphite through physical purification (such as flotation, gravity separation) and chemical purification (such as acid and alkali washing) to obtain high-purity graphite. High-purity graphite is widely used in the nuclear industry, electronics industry, and other fields.
4.Spherical Graphite Preparation Technology:
Processing natural flake graphite into spherical graphite through grinding and shaping processes, mainly used as anode material for lithium-ion batteries. Spherical graphite has high conductivity and high capacity.
5.Flexible Graphite Products Manufacturing Technology:
Compressing and rolling expanded graphite to produce flexible graphite paper, graphite films, and other products. These products have good electrical conductivity, thermal conductivity, and high-temperature resistance, and are widely used in electronics, electrical, chemical, and other industries.
6.Artificial Graphite Preparation Technology:
Using petroleum coke, pitch coke, and other materials as raw materials, and preparing artificial graphite through high-temperature carbonization and graphitization processes. Artificial graphite has a stable structure and excellent performance, widely used in batteries, electrode materials, and other fields.
The continuous development of graphite deep processing technology provides a solid technical foundation for the diversified applications of graphite materials.