Zirconium Diboride (ZrB2) Nanoparticles

Zirconium diboride (ZrB₂) nanoparticles are a member of transition metal diborides. These nanoparticles have a hexagonal structure and available as a black powder. The average particle size of ZrB₂ nanopowders is around 45 nm. The properties of ZrB₂ nanoparticles present both metal-like and ceramic-like behavior. ZrB₂ has a high melting point, high hardness, high electrical conductivity, excellent corrosion resistance against molten iron and slags, good thermal shock resistance. ZrB₂ is wet by molten salts but is not attacked by them.

The melting point of ZrB₂ is around 3000°C, hardness is around 20-25 GPa, the elastic modulus is 340-500 GPa, thermal conductivity is around 60 W/mK, electrical resistivity is 10-32 μΩ.cm, and zeta potential is around 46 mV. ZrB₂ shows excellent oxidation resistance up to 1200-1400°C. The outstanding properties of ZrB₂ are utilized in;

• Thermal protection materials,
• High strength cutting tools,
• High-temperature electrodes,
• Molten metal crucibles,
• Wear-resistant parts,
• Additives in ceramic materials.