Quartz Glass Plate 0.5mm 1mm 2mm Thickness Fused Silica Clear Custom Size
Ultra-thin optical flats and transparent substrate sheets featuring deep-UV transmission, high thermal stability, and custom laser-cut dimensions.
2–500mm
OD Production Window
≤ 20 ppm
Metallic Impurities (High-Purity Sand)
1,100 °C
Continuous Working Temp
≤ 2 Hours
Direct Technical Engineering Response
Precision Optical & Thermal Portfolio
High-Performance Quartz & Fused Silica Catalog
Manufactured from high-purity natural quartz sand and synthetic crystal matrices to guarantee ultra-low thermal expansion, high mechanical strength, and superior spectral transmission.
Quartz Oil Level Sight Glass Plate Fused Silica Clear Custom Size
High-pressure resistant, corrosion-proof sight glass indicators engineered for industrial petrochemical pipelines and hydraulic reservoirs.
Quartz Glass Plate for Optical Window Fused Silica High Transmittance
Precision double-side polished optical viewports optimized for laser spectroscopy, imaging sensors, and ultra-high-vacuum observation ports.
Quartz Substrate Plate for Semiconductor Fused Silica Clear Polished
Cleanroom-processed semiconductor substrates with mirror-polish Ra ≤ 0.5nm, minimal bubble density, and excellent dielectric integrity.
Quartz Optical Flat Plate Fused Silica High Flatness Polished Custom
Interferometer-tested optical references providing surface flatness up to λ/10 for precision metrology and laser cavity mirrors.
Quartz Observation Window Plate Fused Silica High Pressure Clear
Flame-annealed thermal observation ports capable of withstanding extreme pressure gradients and rapid thermal cycling up to 1,200 °C.
Quartz Disc with Groove Fused Silica Plate Clear Polished Custom Size
CNC micro-machined disc geometries engineered with custom circular sealing grooves for hermetic O-ring industrial assemblies.
Slotted Quartz Plate Grooved Fused Silica Sheet Precision Custom Size
Multi-channel precision slotted wafer carrier plates designed for semiconductor chemical etching baths and diffusion boats.
Engineering Authority & Supply Chain Resilience
Industry Whitepaper: The Strategic Advantage of Donghai Fused Quartz
Procuring fused quartz tubes and precision silica components on a global scale requires navigating a delicate balance between chemical purity, geometrical concentricity, thermal stress tolerance, and international supply chain stability. As international semiconductor fabrication expands and photovoltaics transition toward ultra-thin N-type TOPCon/HJT cell architectures, the demand for furnace core tubes with large diameters (> 300 mm to 520 mm) and extreme structural rigidity has reached historic highs.
Headquartered directly in Donghai County, Jiangsu Province — known globally as China's Quartz Capital — VEZLO Quartz Products Co., Ltd. operates across a comprehensive 50-mu (≈33,000 m²) production base backed by RMB 10 million in fixed assets. Operating at the geographic nucleus of China's high-purity natural silica mineral belt allows us to directly control downstream purification down to ≤ 20 ppm total metallic impurities across 13 certified sand grades. This upstream raw-material integration virtually eliminates the microscopic air lines, micro-crystallites, and hydroxyl (OH-) non-uniformities that compromise lesser-grade furnace tubes.
Our technical pedigree is solidified by our successful execution of the Jiangsu Provincial Science & Technology Support (Industrial) Project for the 320 mm high-purity quartz tube used in large-scale integrated circuit processing. Furthermore, our newly developed 520 mm large-diameter high-purity fused quartz tube has completed national preliminary technical appraisals for cutting-edge 12-inch and 14-inch wafer diffusion furnaces, driven by an annual R&D commitment surpassing RMB 5 million.
| Physical / Chemical Property | Standard Clear Fused Quartz | High-Purity Semiconductor Tube | Procurement Strategic Impact |
|---|---|---|---|
| SiO₂ Purity Ratio | ≥ 99.95% | ≥ 99.995% | Mitigates volatile trace metal outgassing during high-temp wafer processing. |
| Hydroxyl (OH⁻) Content | ≤ 150 – 200 ppm | ≤ 5 – 30 ppm (Vacuum Dehydroxylated) | Low OH prevents structural sagging and premature devitrification above 1,050 °C. |
| Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / °C | 5.4 × 10⁻⁷ / °C | Immune to extreme thermal shock; withstands instant quench from 1,100 °C to ice water. |
| Continuous Service Temp | 1,100 °C | 1,150 °C (Short spike 1,300 °C) | Ensures thermal longevity in heavy oxidation and LPCVD reactor chambers. |
| Dimensional Tolerance | OD ± 0.5 mm | OD ± 0.1 mm / Wall ± 0.08 mm | Guarantees hermetic sealing with vacuum flanges and robotic load-ports. |
Why Global Buyers Choose VEZLO
Integrated Manufacturing & Quality Architecture
From initial sand beneficiation to precision five-axis cold-work grinding and hot flame-finishing, every phase of production is monitored by calibrated optical inspection.
Source-Cluster Purification
Located in Tuofeng Township, Donghai, our raw sand processing refines natural quartz to ≤20 ppm metallic impurity, suppressing transition metals like Fe, Cu, Ni, and Ti that trigger early micro-devitrification.
Advanced Hot & Cold Forming
We combine high-temperature electrical continuous drawing with CNC ultrasonic drilling, multi-axis slotted cutting, and cleanroom optical polishing (Ra ≤ 0.5nm) for intricate quartzware.
Rigorous Metrology & Quality
Every industrial diffusion tube and optical window undergoes laser gauge geometry verification, stress polariscopic inspection, and ultrasonic wall thickness validation prior to vacuum packing.
Export Shock-Proof Logistics
Specialized pearl cotton suspension cushioning and reinforced fumigation-free plywood crates guarantee zero-breakage ocean and air freight delivery to Europe, America, and the Asia-Pacific region.
Strategic Market Forecast
Future Procurement & Technological Trends
An executive analysis of next-generation fused quartz requirements shaping industrial and clean-energy supply chains through 2030.
1. Transition to Ultra-Large Diameters (>500mm)
As semiconductor fabs upgrade to larger wafer batches and accelerated vertical furnaces, traditional 200–300 mm tubes are rapidly ceding ground to 500 mm+ continuous-melt tubes. Buyers must partner with manufacturers equipped with multi-megawatt drawing towers capable of controlling wall-thickness runout below 1.5% across 3,000 mm tube lengths.
2. Strict Hydroxyl (<10ppm) Mandates for Lifespan
Thermal fatigue in solar PV PECVD and low-pressure diffusion processes is exacerbated by high hydroxyl levels. Future procurement contracts increasingly specify electric-melt, vacuum-annealed quartz with OH ≤ 10 ppm to prolong tube life from 6 months to over 18 months under harsh silane and ammonia corrosive atmospheres.
3. Closed-Loop High-Purity Raw Material Supply
Geopolitical scrutiny over raw mineral accessibility makes single-source reliance hazardous. Leading tier-1 buyers now prioritize Chinese exporters who own certified native sand refining assets, ensuring that upstream shortages never cause lead times to drift beyond standard 10–15 day manufacturing intervals.
Procurement Guide
Frequently Asked Technical & Sourcing Questions
Comprehensive engineering insights addressing common dilemmas encountered by corporate procurement teams.
What specific parameters define an export-grade fused quartz tube?
An export-grade fused quartz tube is defined by four core metrics: outer diameter (OD) and wall thickness tolerance (typically held within ±0.1 mm to ±0.3 mm), chemical purity (≥99.99% SiO₂ with total metallic contaminants ≤20 ppm), visual optical clarity (absence of continuous air lines, inclusions, or bubbles >0.2 mm), and residual stress birefringence (≤15 nm/cm following automated electric annealing).
What is the functional difference between natural fused quartz and synthetic fused silica?
Natural fused quartz is produced by high-temperature electric or oxy-hydrogen melting of natural crystal sand, providing unrivaled mechanical stiffness, superior thermal deformation resistance (annealing point ≈ 1,215 °C), and exceptional cost efficiency for high-temperature furnace tubes and labware. Synthetic fused silica is synthesized via chemical vapor deposition of silicon tetrachloride (SiCl₄), providing higher deep-UV transmission (down to 190 nm) and near-zero bubble density, making it optimal for laser optics and lithography masks.
How does VEZLO ensure zero breakage during international multi-modal transit?
Our export packaging utilizes a triple-tier suspension design: each individual tube or plate is wrapped in moisture-barrier anti-static film, suspended in high-density closed-cell pearl cotton foam, and anchored inside heavy-duty multi-layer cartons or IPPC-certified fumigation-free plywood shipping crates. This packaging withstands 1.2-meter drop simulations and severe ocean-freight harmonic vibration.
Can customized machining (flanges, slots, ball joints) be manufactured from customer CAD drawings?
Yes. Our Donghai facility houses dedicated cold-machining and glass-blowing centers. We accept STEP, DWG, DXF, and PDF drawings to execute precision ground joints, flat or domed tube ends, CNC micro-slotted carrier plates, flared necks, and custom-welded gas injection quartz ports with tolerances down to ±0.05 mm.
What is the difference between standard clear tubes and ozone-free quartz tubes?
Standard clear quartz transmits UV radiation across both the 185 nm and 254 nm spectral lines. When the 185 nm wavelength interacts with ambient oxygen, it splits O₂ molecules into reactive ozone (O₃). Ozone-free quartz tubes are doped with trace elements (such as titanium) that selectively filter and absorb the 185 nm band while maintaining maximum transmission of the germicidal 254 nm wavelength, preventing harmful indoor ozone buildup in water and air disinfection units.