Titanium porous getters are porous structural materials made of pure titanium by powder metallurgy (such as isostatic pressing + vacuum sintering). Its core features are high porosity (usually 30%-40%), large specific surface area, and the inherent high chemical activity of titanium, which enables it to efficiently adsorb a variety of gases at high temperatures.
In vacuum systems, getter materials like titanium are often heated to release reactive gases, which then react with and absorb any residual gas molecules present in the vacuum chamber. This process helps maintain the desired vacuum levels by effectively removing unwanted gases that could interfere with the operation of the system.
1. Fundamental Principles
Titanium getters are non-evaporable getters (NEGs) that chemically adsorb reactive gases (H₂, O₂, N₂, CO, etc.) through the formation of stable compounds (e.g., TiH₂, TiO₂).
Their effectiveness stems from:
High surface area
Exothermic reactions with gases at 400-800°C activation temperatures
Low equilibrium pressure
2. Industrial Applications
Vacuum Electronics
Maintain ultra-high vacuum in X-ray tubes and particle accelerators
Semiconductor Manufacturing
Control residual gases in deposition chambers (e.g., preventing Cu oxidation)
Energy Storage
Hydrogen purification for fuel cells
Aerospace
Satellite propulsion systems (adsorbing H₂ from hydrazine decomposition)
