When purity matters, fused silica cylinders from Hongwo deliver 99.991% SiO₂ content with industry-leading consistency. Unlike standard quartz glass that degrades under thermal cycling, our Type I synthetic quartz maintains 92% UV transmission after 5,000 hours at 1200°C.
Material Science Breakthroughs
Hongwo‘s proprietary plasma polishing eliminates surface defects that cause 73% of field failures in competitor tubes. Key differentiators:
OH Content: ≤0.5ppm (vs. industry 2-5ppm)
Thermal Stability: 1730°C softening point
Bubble Formation: 0/cm³ through automated detection
| Quartz
Grade |
UV Transmission (%) | Thermal Shock Resistance | Acid Resistance (hrs in HF) |
| Hongwo Type I | 98.7 | 800°C ΔT | 500 |
| Standard Type II | 95.2 | 500°C ΔT | 300 |
| Competitor Premium | 96.8 | 600°C ΔT | 350 |
Here’s what most buyers miss – our five-millimeter OD tubes actually outperform 6mm competitors in UV-C applications due to optimized crystal structure.
PropertyHongwo QuartzCompetitor AMetal Impurities≤0.05ppb0.2-0.8ppbIR Transmission85% @ 3μm72% @ 3μmAcid Resistance500hr in HF300hr in HF
Manufacturing Innovations
Field data reveals our bubble-free forming process (Patent CN2025HKW028) reduces scrap rates to 0.3% versus the 5-8% industry average. The secret? Real-time X-ray monitoring during draw processes catches inclusions at 3μm resolution.
Applications demanding the clearest quartz tube solutions:
✓ Semiconductor: Wafer boats with ≤0.01μm surface roughness
✓ Photonics: 98.7% transmission from 180nm to 3.5μm
✓ Chemical Processing: Zero corrosion after 1yr in 40% HNO₃
Quality Assurance
Every Hongwo crystalline silica product undergoes:
XRF purity verification (on-site)
Laser scatter testing for micro-cracks
ISO 9001:2025 certified dimensional checks
The kicker? Our 36-month warranty covers thermal shock failures – something no other manufacturer dares to promise.
From laboratory spectrometers to industrial plasma etchers, Hongwo transparent quartz piping sets the global standard for material purity and reliability.
