HfO

Hafnium oxide (HfO₂) is a refractory ceramic compound valued for its extremely high melting point and thermal stability, making it suitable for extreme-environment applications. It is widely used in aerospace thermal protection systems, nuclear fuel cladding, and high-temperature coatings, where its resistance to oxidation and chemical attack provides significant performance advantages over alternative ceramics. In semiconductor manufacturing, HfO₂ serves as a high-κ dielectric material in advanced gate oxides, enabling continued device scaling where traditional silicon dioxide becomes prohibitive.