Hafnium Oxide (HfO2)

Base Information

Boiling Point: 5400 ^oC   

Melting Point: 2758 ^oC + 25 ^oC

Specific Gravity:9.68 at 20 ^oC      

Solubility in H₂O:Insoluble       

Appearance and Odor:    White powder, pieces, and tablets, no odor 

Purity--- 99%, 99.9%,99.99%

Shape--- Discs, Rectangle, Rods, Pellets,  Irregular, Custom-Made

Dimension---

      Discs: Dia(≤360mm), Thickness(≥0.5mm)

      Rectangle: Length(≤600mm), Width(≤350mm), Thickness(≥0.5mm)

      Rods: Dia(≤360mm), Length(≤600mm)

      Pellets: Dia(≤360mm), Thickness(≥0.5mm)

Hafnium Oxide (HfO2) Evaporation Material
Density--- 9.68-9.90 g/cm3 Solubility---Insoluble in water
Purity---99.99% 

Melting point--- 2850 ℃ Vapour Pressureat 2678 ℃ 1 Pa,at 2875 ℃ 10 Pa

Linear expansion coefficient---5.6×10-6/K
Properties of thin film
     Transmission range ～ 220～12000nm
     Refractive index at 250nm～ 2.15,  at 500nm ～ 2
Hints on evaporation
      Evaporation with electron-beam gun.
      Oxygen partial pressure ～ 1～2×10-2 Pa
      Evaporation temperature ～ 2600 ～ 2800 ℃
      Substrate temperature～ 250 ℃
      Rate of deposition 2 nm/s
      Evaporate with low energy density. 

Shape---Solid substance, White or grey tablets, Powder

Application ---Anti-reflection coatings, interference coatings for the UV.