as the main product of the process, is a very important and strategic product in the industry chain and is considered as the most practical upstream product in the industry and has gained the title of the most important practical material in semi-conductors’ industry, electronic information and photovoltaic solar cells new energies industry and industries of new substances. The industrial products resulting from it have different types and include a vast spectrum of fields. They are known as magical products in the industry, to the point that, in China which has a share of around 64% in global production of this product, this product is considered as one of the pillars of China’s economic reconstruction. According to the experts, generating photovoltaic energy will be one of the most important sources of primary energy for human beings in the middle and late 20th century. Therefore, creating a high base to start producing silicon metal in a large scale has a strategic importance for generating photovoltaic power and even regulating energy structure in the long run
The physical characteristics of silicon metal are presented in the table below.
|Melting Point||1414 °C|
|Boiling Point||2900 °C|
|Solubility in H2O||N/A|
|Electrical Resistivity||40.6 K-Cal/gm atom at 2355 °C|
|Electronegativity||0.064 - 0.28|
|Heat of Fusion||0.168 Cal/g/K @ 25 °C|
|Heat of Vaporization||N/A|
|Poisson's Ratio||1.49 W/cm/K @ 298.2 K|
|Specific Heat||(25 °C) 2.6 µm·m-1·K-1|
|Thermal Conductivity||51-80 GPa|
The classification of silicon metal is usually based on the amount of iron, aluminum and calcium it contains. Therefore, according to the content of iron, aluminum and calcium in silicon metal, the types of product grade of Araz silicon production are according to the table below.
|Si (%)||Impurity Content (%)|
|421G||>99.2 %||≤0.4||0.1—0.15||≤0.1||—||Future Plan|