← Hafnium Oxides
Hafnium Oxide
Hafnium oxide is an oxide powder used in optical-coating materials and dielectric-material research. The listed grades distinguish hafnium oxide content from the zirconium oxide ratio, allowing these criteria to be reviewed independently.
SAMPLE REQUESTClick to request a product sampleProduct Parameters / Technical Specifications
Specification
- Appearance
- White powder
- Particle size
- 99.7% < 90 μm
Moisture & Loss on Ignition (LOI)
- Moisture
- ≤ 0.2%
- Loss on Ignition (LOI)
- ≤ 0.3%
| HfO₂ | I | II | III | IV |
|---|---|---|---|---|
| ≥ 99% | ≥ 99% | ≥ 98% | ≥ 96% | |
| ZrO₂/(HfO₂+ZrO₂) | < 0.2% | 0.2-0.5% | 0.5-1% | 1-3% |
Trace Element Analysis
| Al | B | Cd | Co | Cr | Cu | Fe | Mg |
|---|---|---|---|---|---|---|---|
| ≤ 50 ppm | ≤ 0.5 ppm | ≤ 0.5 ppm | ≤ 2 ppm | ≤ 30 ppm | ≤ 5 ppm | ≤ 100 ppm | ≤ 20 ppm |
| Mn | Na | Nb | Ni | P | Pb | Si | Sn |
| ≤ 2 ppm | ≤ 100 ppm | ≤ 5 ppm | ≤ 5 ppm | ≤ 100 ppm | ≤ 10 ppm | ≤ 150 ppm | ≤ 2 ppm |
| Ta | Ti | U | V | W | Ca | Zn | |
| ≤ 20 ppm | ≤ 100 ppm | ≤ 2 ppm | ≤ 2 ppm | ≤ 2 ppm | ≤ 50 ppm | ≤ 5 ppm |
Material Selection
- Select the required grade using both the hafnium oxide purity and zirconium oxide/(hafnium oxide+zirconium oxide) limits.
- Confirm powder size and any conversion into granules, pellets or other coating-source forms with the intended deposition process.
Applications
- High-k dielectrics
- Optical coatings
- Thermal-barrier applications