1.Production method of metallic silicon
Preparation of metallic silicon by carbothermal method
Carbothermal method is the most commonly used method in the preparation of metallic silicon. The main principle is to react silica and carbon powder at high temperature to generate metallic silicon and a certain amount of carbon dioxide. The main steps for preparing metallic silicon by carbothermal method are as follows.
(1) Silica and coke are mixed to make a graphite silicon mixture.
(2) Put the mixture into a high-temperature electric furnace and heat it to above 1500°C to react to generate metallic silicon and a certain amount of carbon dioxide.
Preparation of metallic silicon by silicothermal method
Silicothermy is a method of reducing silicon and metal oxides to metals. The main principle is to react silicon and metal oxides at high temperatures to generate metal silicon and a certain amount of oxides. The main steps for preparing metallic silicon by silothermal method are as follows.
(1) Mix silicon and metal oxides to make ferrosilicon alloy.
(2) Put the ferrosilicon alloy into a high-temperature electric furnace and heat it to above 1500°C to react to generate metallic silicon and a certain amount of oxides.
Preparation of metallic silicon by vapor deposition method
Vapor deposition method is a method that reacts gas at high temperature to generate metallic silicon. Its main principle is to react metal gas and silicon gas at high temperature to generate metal silicon and a certain amount of gas. The main steps for preparing metallic silicon by vapor deposition are as follows.
(1) Mix metal gas and silicon gas to make reaction gas.
(2) Inject the reaction gas into the reactor and heat it to high temperature to react to generate metallic silicon and a certain amount of gas.
2.The application of metallic silicon
Semiconductor materials
As an important semiconductor material, silicon metal is widely used in the field of electronics. Semiconductor materials are the basis of electronic components, including insulators, conductors, semiconductors, superconductors, etc., of which semiconductor materials are the most commonly used. Due to the special physical properties of metal silicon, it has become an important raw material for the production of semiconductor components.
Solid state electronic components
Silicon metal is also widely used in solid-state electronic components. For example, metal silicon can be used to manufacture metal silicon field-effect transistors, metal silicon light-emitting diodes, metal silicon diodes, etc.
Casting field
As an ideal casting material, silicon metal also has important applications in the field of casting. Casting industry is the foundation of machinery manufacturing industry, metal silicon as a casting material can improve the performance of castings, and improve production efficiency. Silicon metal casting has the characteristics of high stability, high strength, high toughness, high thermal conductivity, high wear resistance, etc., and is widely used in automobile, machinery, railway and other fields.
Metallurgy
Silicon metal is also widely used in the field of metallurgy. Silicon metal is an important raw material for producing electronic grade silicon, which is widely used in photovoltaic cells, semiconductor devices, solar cells and other high-tech fields, and is an important strategic new material. In addition to being a raw material for the manufacture of electronic grade silicon, metallic silicon can also be used to manufacture alloys, silicate cementing materials, etc.
To sum up, silicon metal is an important material, which is widely used, involving many fields such as electronics, casting, metallurgy and so on. With the continuous development and progress of science and technology, the application prospect of metal silicon will be broader.
Post time: Dec-15-2023
