HAFNIA FIBERS and TEXTILES
TYPE HF
Features
- High Purity
- High Temperature Stability
- Low Thermal Conductivity
- Excellent Thermal Shock Resistance
- No Outgassing
- Six Different Product Formats Offered
- Available 'Off the Shelf'
Our hafnia (HfO2) fibers and textiles are made by the same unique Zircar process used for manufacturing yttria-stabilized zirconia cloths and felts. Our high purity hafnia fiber and textiles are offered in six different standard product forms; bulk fiber Type HfBF, two felts Types HfF-50 and HfF-100 and three types of knit cloth Types HfK-15, HfW-15 and HfW- 30.
APPLICATION INFORMATION
Hafnia is used as ultra high temperature insulation for nuclear meltdown experiments.
PROPERTIES & CHARACTERISTICS
| HfF-100 | HfK-15 | |
|---|---|---|
| Nominal Composition, Wt% | ||
| HfO2 | 99+ | 99+ |
| ZrO2 | 0.026 | 0.026 |
| Fe2O3 | 0.012 | 0.012 |
| SiO2 | <0.01 | <0.01 |
| Melting Point, °C (°F) | 2758 (4996) | 2758 (4996) |
| Bulk Porosity, % | 95 | 89 |
| Bulk Density, g/cc (pcf) | 0.5 (31) | 1.1 (67) |
| Tensile Strength, g/cm width (lb/inch width) | 55 (0.31) | 100 (0.56) |
| Loss on Ignition, 1 hr at 950°C (1742°F), Wt% | 0.1 | 0.0 |
| Outgassing | Nil | Nil |
| % Shrinkage, 1 hour at 1650°C (3002°F) | 5 | 6 |
ORDERING INFORMATION
Type Hf Fibers and Textiles are available in six standard product forms, which are listed in the table below with their ordering item number. Please contact our Sales Department for pricing and availability.
| Standard Sizes | Item Number |
|---|---|
| HfF-50, FELT, 12" X 12" X ~0.05" | E03A01 |
| HfF-100, FELT, 12" X 12" X ~0.1" | E03B01 |
| HfK-15, TRICOT KNIT CLOTH, 12" X 12" X ~0.015" | E03C01 |
| HfW-15, SQUARE WEAVE CLOTH, 12" X 12" X ~0.015" | E03D01 |
| HfW-30, SATIN WEAVE CLOTH, 12" X 12" X ~0.03" | E03E01 |
| HfBF, BULK FIBER, 1 pound | E03F01 |
