Product Name: Neodymium disilicide (NdSi2)

Specification: 0.8-10um (D50)

Shape: irregular

Color: Black gray

Features: Optical properties, high thermoelectric efficiency and excellent stability

Applications: Optical, thermal, catalyst, material science, ‌ chemical industry, ‌ electronic industry and other fields

NEODYMIUMSILICIDE 

CAS number: 12137-04-1 

Molecular formula: NdSi2 

Molecular weight: 200.41 

EINECS number: 235-234-4 

Preparation process: 

1) The mixture of Nd, Si, and Hg is heated in a quartz tube using an electric furnace at a temperature of approximately 450 ℃ for 10-12 hours, and excess mercury is distilled off using a bent tube. After the mercury is collected at the cold end of the tube, the product is annealed at 450-600 ℃ at the hot end of the tube. 

2) According to the stoichiometric relationship of the reaction, Nd2O3 and Si are weighed (continuously evacuated) and reacted in an alumina boat under vacuum conditions to rapidly and completely remove the SiO formed during the reaction. The reaction temperature is controlled between 1100 and 1600 ℃, and when it exceeds 1600 ℃, impurities are usually mixed in due to the participation of the container in the reaction. 

Application: 

Thermoelectric material 

1. Energy conversion device: Neodymium silicide may have good thermoelectric properties, which can directly convert thermal energy into electrical energy and be applied in industrial waste heat recovery or radioactive isotope thermoelectric power generation (RTG) for space probes. This type of application relies on the high-temperature stability and thermoelectric efficiency of the material. 

2. Hydrogen storage materials 

Hydrogen energy technology: Some rare earth silicides may serve as hydrogen storage media due to their lattice structure suitable for hydrogen atom adsorption. If the hydrogen storage capacity of neodymium silicide is verified, it can play a role in fuel cells or hydrogen storage systems. 

3. Magnetic applications 

Special magnets: Neodymium is known for its strong magnetism (such as neodymium iron boron magnets), but the magnetic properties of neodymium silicide may differ from pure neodymium compounds, and its magnetic ordered structure needs to be specifically studied. Potential applications include magnetic sensors or specific high-frequency applications. 

4. Catalytic field 

Chemical reaction catalyst: Rare earth elements are often used as catalysts, and neodymium silicide may catalyze specific reactions in organic synthesis or exhaust gas treatment, such as methane reforming or nitrogen oxide reduction. 

5. High temperature materials 

Extreme environmental applications: If neodymium silicide has high melting point and oxidation resistance, it may be used for aircraft engine coatings or high-temperature furnace components, but it needs to be combined with other materials to optimize mechanical strength. 

6. Electronic components 

Semiconductor process: Similar to other metal silicides (such as titanium silicide), it may serve as a low resistance contact layer or diffusion barrier in integrated circuits, but its compatibility with silicon substrates needs to be verified. 

7. Nuclear industry 

Neutron absorbing materials: The neutron cross-section characteristics of neodymium may enable the use of neodymium silicide in control components of nuclear reactors, but practical applications require consideration of irradiation stability. 

Storage method: This product should be sealed and stored in a dry and cool environment. It should not be exposed to air for a long time to prevent moisture from causing aggregation, affecting dispersion performance and usage effect. In addition, it should be avoided from heavy pressure and not in contact with oxidants. It should be transported as ordinary goods.