Product Name: Niobium Disilicide (NbSi2) 
Specification: 0.8-10um (D50) 
Appearance: Irregular 
Color: Black Grey 
Features: Excellent high-temperature strength, corrosion resistance, and oxidation resistance 
Usage: Aerospace, nuclear energy, power equipment, electronics and materials science, and other fields

English name: niobium disilicide 

CAS:12034-80-9 
EINECS:234-812-3 
Molecular formula: NbSi2 
Molecular weight: 149.0774 
Melting point: 1940 ℃ 
Property: It is a gray hexagonal crystal. Relative density 5.7. Lattice constant: 0.4863nm, C=0.6604nm. Melting point 1950 ℃, microhardness 10.3GPa (1050kg/mm2), Vickers hardness 5.88-6.88GPa (600-700kg/mm2), conductivity 50.4 × 10-4 S/m, thermal expansion coefficient 7.3 × 10-6 ℃ 1. Insoluble in water, concentrated hydrochloric acid, and concentrated sulfuric acid, soluble in a mixed solution of hydrofluoric acid and sulfuric acid. 
1. Niobium silicide composite material binary alloy based composite material is a promising high-temperature structural material. In this biphasic composite material, solid solution niobium provides room temperature toughness while Si2Nb provides high-temperature strength. This composite material has high thermodynamic stability and microstructural stability at high temperatures. 
NbSi2 based high-temperature alloys have high melting points, low densities, and excellent comprehensive properties. Their target operating temperature is 200-300 ℃ higher than Ni based high-temperature alloys, and they are expected to be applied to gas turbine engine blades and hot end components of aerospace ramjet engines working at 1300-1500 ℃. 
The research and development idea of NbSi2 based high-temperature alloys is mainly to form niobium based solid solution/Nb5Si3 biphasic composite materials by adding tough solid solution phases, which can improve their room temperature toughness while maintaining excellent high-temperature strength. 
Method: Using niobium and silicon as raw materials, metal niobium and silicon are crushed and thoroughly mixed before being placed in a graphite furnace. The furnace is gradually heated and heated until the temperature reaches 1000 ℃ for reaction. Then, hydrogen gas is introduced to raise the temperature to 1400-1900 ℃ before continuing the reaction to produce niobium silicide. Niobium pentoxide and metallic silicon can also be placed in a reduction furnace and reduced at 1400 ℃ for more than 30 minutes to produce niobium silicide. 
Application: It can be used as a solid solution with zirconium disilicide, molybdenum disilicide, and tungsten disilicide, and as a raw material for fine ceramics. Niobium silicide based turbine components, integrated circuits, high-temperature structural materials, etc. 
Packaging and storage: This product is packaged in an inert gas filled plastic bag, sealed and stored in a dry and cool environment. It should not be exposed to air to prevent moisture from causing oxidation and aggregation, which may affect dispersion performance and usage effectiveness; The packaging quantity can be provided according to customer requirements and divided into smaller packages.