QF
Astroquartz II Yarn QS13
JPS Composite Materials ? QUARTZ
Manufacturer page / TDSDescription
Extremely fine continuous high-purity fused-silica yarn.. Product form: Continuous yarn. Thermal/service: Extended heat exposure to 2000°F (about 1093°C). Official source: AF-JPS-ASTROQUARTZ
Comparative overview
Quartz/fused-silica fiber — High-purity quartz fiber
Strengths: Exceptional RF transparency with very low dielectric loss, low thermal expansion and excellent thermal-shock/high-temperature behavior.
When to use: Select for premium radomes, antennas, electromagnetic windows, ablatives and high-temperature electrical insulation.
Key tradeoffs: Very high cost and limited supply; more difficult handling and lower mainstream availability than E/S-glass.
Qualitative ratings (1–10 scale)
| Relative cost | 10/10 — Very high — ultra-high-purity fused quartz fiber with demanding production and very limited suppliers. |
|---|---|
| EM transparency | 10/10 — Exceptional — benchmark low dielectric constant/loss for radomes, antennas and space signal-integrity structures. |
| Temperature / fire resistance | 9/10 — Excellent — excellent heat reliability and high silica purity, though below oxide/SiC CMC hot-section capability. |
| Impact / penetration resistance | 4/10 — Moderate — high strength but brittle fracture and limited strain reduce impact energy absorption. |
| Electrical / thermal conductivity | 1/10 — Very low — electrical insulator with low thermal conductivity. |
| Specific tensile strength | 6/10 — 6/10 | 1566.8 kN·m/kg | Class median |
| Atmospheric durability | 9/10 — Excellent — fused quartz is highly resistant to UV, moisture and most atmospheric agents; sizing/interface durability is the principal limitation. |
| Sustainability (CO₂e) | 7/10 — 4.50 kg CO₂e/kg fiber — Medium emissions — data quality: Low |
Technical properties
| Density | 2.2 g/cm³ |
|---|---|
| Filament diameter | 9.0 µm |
Applications and processing
Radomes; antennas; high-temperature electrical insulation; thermal and dielectric compositesWeaving; braiding; insulation and composite textile conversion