Crystal Structure and Phase Transition Analysis of Iron Disilicide FeSi2 Powder

Crystal structure of Iron Disilicide Powder：

The crystal structure of ferrosilicide depends on its preparation conditions and temperature. At high temperatures, the crystal structure of iron silicide is a face-centered cubic structure (FeSi), in which the Fe and Si atoms occupy the vertex and face-centered positions of the face-centered cubic lattice, respectively. At low temperatures, the crystal structure of iron silicide transforms into a body-centered cubic structure (β-FeSi2). In addition, there is a hexagonal structure of low thermal expansion (α-FeSi2). The main difference between the three crystal structures is the arrangement of the Si atoms and the position occupied by the Fe atoms.

Phase transition of Iron Disilicide Powder：

Iron silicide's phase transition refers to transforming iron silicide from one crystal structure to another at different temperatures. The transformation of ferrosilicide includes transforming from a temperature face-centered cubic structure to a temperature body-centered cubic structure and from a temperature body-centered cubic structure to a temperature face-centered cubic structure. In both phase transitions, the arrangement of the Si atoms and the position occupied by the Fe atoms change.

1. Transition from high to low temperature: When the temperature is reduced, the iron silicide changes from a face-centered cubic structure to a body-centered cubic structure. In this process, the Si atoms move from face-centered to body-centered positions, while the Fe atoms are rearranged accordingly. This phase transition is reversible and can be reversed back to the face-centered cubic structure at higher temperatures.

2. Transition from low temperature to high temperature: When the temperature rises, iron silicide changes from a body-centered cubic structure to a face-centered cubic structure. In this process, the Si atoms move from the body-centered to the face-centered position, and the Fe atoms rearrange accordingly. This phase transition is also reversible and can be reversed back to the body-centered cubic structure at a reduced temperature.

Influencing factors of phase transition of Iron Disilicide Powder：

The transformation of ferrosilicide is affected by many factors, including preparation conditions, temperature, pressure and doping. Among them, temperature is one of the most important influencing factors. The stable phase of iron silicide at high temperatures is a face-centered cubic structure, which will gradually change into a body-centered cubic structure with the decrease in temperature. In addition, pressure and doping also affect the phase transition of ferrosilicide. Under high pressure, the phase transition temperature of ferrosilicide will increase. Doped elements can change the phase transition temperature and process of ferrosilicide.

Influencing factors of phase transition of Iron Disilicide Powder：

The transformation of ferrosilicide is affected by many factors, including preparation conditions, temperature, pressure and doping. Among them, temperature is one of the most important influencing factors. The stable phase of iron silicide at high temperatures is a face-centered cubic structure, which will gradually change into a body-centered cubic structure with the decrease in temperature. In addition, pressure and doping also affect the phase transition of ferrosilicide. Under high pressure, the phase transition temperature of ferrosilicide will increase. Doped elements can change the phase transition temperature and process of ferrosilicide.

Supplier of Iron Disilicide Powder：

Synthetic Chemical Nano Technology Co. Ltd. is a trusted supplier and manufacturer of chemicals and Nanomaterials. They have over 12 years of experience providing high-quality chemical products and Nanomaterials such as Boride powder, Nitride powder, graphite Powder, Sulfide Powder, 3D printing material, etc.

High-quality products are what you want, FeSi2 Pulver. Please feel free to contact us to enquire. ( sales5@nanotrun.com )

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