English name: Iron boride 
CAS No.： 12006-84-7  
EINECS number: 234-489-9 
Molecular formula: Fe2B 
Molecular weight: 66.66 
Density: 7.15g/mL 
Iron boride is a compound composed of two elements, iron and boron, belonging to the boron group of metals. Iron boride is a material with important application value, widely used in industrial manufacturing, electronics, optics, aerospace and other fields. 
The preparation methods of iron boride mainly include chemical vapor deposition, rapid solidification, arc melting, halide molten salt electrolysis, etc. Among them, chemical vapor deposition is one of the most commonly used preparation methods. The specific operation is to deposit iron and boron gases in an appropriate ratio on the substrate through vapor deposition at high temperature, thereby forming a solid FeB thin film. The rapid solidification method is to rapidly solidify iron and boron elements at high temperatures to prepare boron iron block materials. 
Iron boride has many excellent physical and chemical properties. It has good hardness, wear resistance, and conductivity, as well as excellent corrosion resistance and high temperature resistance. Iron boride is generally a gray black crystal with a metallic luster and a density of 7.21g/cm ³. It is unstable in air and prone to oxidation. At high temperatures, iron boride can form alloys with chromium and other elements, and is therefore often used as an additive in other metal alloys. 
The application of iron boride is very extensive. Firstly, iron boride is widely used in the manufacturing of tool tools. Secondly, it is also used as a semiconductor material in electronic devices, such as boost diodes, solar cells, thermocouples, etc; It is also used in optoelectronic products such as optical lenses, sunglasses, and car lights. In addition, iron boride is widely used in the aerospace industry and plays an important role in the construction of spacecraft. 
Overall, iron boride is a material with significant application value. Its preparation method is simple, its performance is excellent, and its application range is wide, making iron boride have broad application prospects in industrial manufacturing, electronic technology, optical technology, aerospace technology, and other fields. In the future, with the continuous development of new material technology, the application of iron boride will continue to expand and deepen, making greater contributions to the continuous development and progress of human society.