Hafnium Silicide HfSi₂ ceramic powder (325 mesh and submicrons)
Hafnium Silicide (HfSi₂) is a high-melting intermetallic compound valued for its oxidation resistance, electrical conductivity, and chemical stability at extreme temperatures. With a melting point above 2000°C, HfSi₂ is commonly used in protective coatings, semiconductor components, oxidation-resistant composites, and high-temperature structural ceramics.
Princeton Powder is a leading supplier of Hafnium Disilicide refractory ceramic powder. Hafnium Carbide Powder, Hafnium Nitride (HfN) powder, and Hafnium oxide powder are for sale in bulk.
Hafnium silicide HfSi2 Powder
Formula | HfSi2 |
Synonyms | Hafnium Disilicide, Hafnium Silicide |
Appearance | Black Powder |
Particle Size | 15-53 um, 45-105 um, can be customized upon request |
Melting Point | 1680 °C |
Density | 8.02 g/cm 3 |
Purity | 99.5% – 99.9% |
CAS Number | 12041-56-8 |
Description of Hafnium silicide HfSi2 Powder
Hafnium silicide (HfSi₂) Powder is a gray, metallic-ceramic powder known for its high melting point (~1830°C), good electrical conductivity, and exceptional thermal and oxidation resistance. As a high-performance refractory silicide, HfSi₂ is widely used in microelectronics, oxidation-resistant coatings, high-temperature heating elements, and aerospace components. It is also integrated into advanced ceramic composites to improve mechanical strength and thermal stability under extreme environments. Proper storage and handling of HfSi₂ powder are essential to minimize oxidation and ensure safe use.
Princeton Powder is a trusted manufacturer and supplier of high-purity Hafnium Disilicide (HfSi₂) powder, offering customized particle sizes and purities. HfSi₂ powder is available for sale at competitive prices with free shipping and technical support.
Hafnium silicide Powder Chemical Composition
Product | Purity (%) | Particle Size (D50) | Chemical Composition (%) | |||
O | N | C | Si | |||
HfSi2-1 | >99.0 | 0.5-1.0 μm | ≤1.0 | ≤0.10 | ≤0.1 | 22.7-23.9 |
HfSi2-2 | >99.5 | 1.0-3.0 μm | ≤0.8 | ≤0.10 | ≤0.1 | 22.7-23.9 |
HfSi2-3 | >99.9 | 10-60 μm | ≤0.5 | ≤0.05 | ≤0.1 | 22.7-23.9 |
HfSi2-4 | >99.9 | -325 mesh | ≤0.3 | ≤0.05 | ≤0.1 | 22.7-23.9 |
Note | Princeton Powder can provide different sizes according to customers’ specific requirements. | |||||
Hafnium Silicide Ceramic Powder Applications
Oxidation-resistant coatings for aerospace components
High-temperature ceramic-metal composites
Electrical contact coatings
Semiconductor diffusion barriers
Thermally stable structural components
Hafnium silicide HfSi2 Powder Reference
Microstructure and phase composition evolution of silicon-hafnia feedstock during plasma spraying and following cyclic oxidation
- In this work, silicon–hafnia (Si-HfO2, 80/20 mol. %) feedstock was plasma sprayed for Environmental Barrier Coating bond coat application. In the as-sprayed coating, hafnium disilicide (HfSi2), HfO2 tetragonal (t), and cubic (c) phases with a total volume of ~20 % were detected together with Si and HfO2 monoclinic (m). The temperature-dependent evolution of these phases was analyzed and paired with microstructural observations. It was found that above 700 °C, HfSi2 oxidizes and HfO2 (t) and (c) transforms into (m) polymorph.
Hafnium silicide (HfSi₂) Powder FAQ
What are the main uses of HfSi₂ powder?
HfSi₂ is used in oxidation-resistant coatings, electronic components, diffusion barriers, and high-temperature structural materials in aerospace and defense applications.
Is Hafnium Silicide electrically conductive?
Yes. HfSi₂ is a conductive ceramic, making it suitable for applications requiring both thermal and electrical performance.
What makes HfSi₂ suitable for high-temperature environments?
Hafnium’s natural stability and the formation of a protective SiO₂ layer give HfSi₂ superior oxidation resistance, especially at temperatures above 1600°C.
What particle size ranges are available?
Standard particle sizes include:
1–5 µm
Submicron or nano-scale options for thin film and coating use