VEZLO leverages vertically integrated raw mineral refining and ultra-precision cold CNC machining to produce standardized and custom fused quartz components. Certified for microelectronics, deep-UV optics, high-pressure sight assemblies, and furnace diffusion lines.
Ultra-parallel optical discs engineered from premium synthetic and natural fused silica. Featuring surface finishes up to 40/20 scratch-dig, double-sided optical polishing, and UV/IR transmission windows exceeding 92%.
Multi-hole perforated showerheads and gas-distribution plates designed for semiconductor plasma etching and PECVD reactors. Micro-drilled with positional tolerances within ±0.02 mm without chipping or thermal stress fractures.
Ultra-high vacuum (UHV) viewport flanges manufactured to withstand differential pressure spikes and bake-out sequences up to 1,100°C. Extremely low outgassing profile with defect-free optical aperture for in-situ process monitoring.
Heavy-wall thermal-shock sight glasses constructed to endure immediate water quenching at 1,000°C without catastrophic failure. Impervious to acidic steam erosion in high-pressure industrial petrochemical boilers.
Continuous-draw transparent quartz pipe blanks ranging from 2 mm to 500 mm OD. Unsurpassed dimensional wall uniformity and zero micro-bubbles, perfect for glassblowing workshops, laser flow tubes, and lamp envelopes.
Picosecond and CO2 laser-profiled fused silica plates offering ultra-smooth perimeter beveling and zero micro-crack propagation. Tailored for analytical instrument slide assemblies and high-energy laser window optics.
Acid-resistant digestion substrates, analytical trays, and UV-transparent spectrophotometer plates. Guaranteed non-reactive across harsh mineral acids (excluding HF) and immune to continuous high-temperature thermal cycling.
Semiconductor grade 4N8 to 5N polished quartz wafer carriers and mask blanks. Characterized by negligible heavy-metal trace impurities, sub-nanometer surface roughness (Ra < 0.5 nm), and superior chemical resistivity in RCA cleaning baths.
As semiconductor fabrication migrates below 3 nm and high-power laser optics demand deeper spectral purity, the procurement criteria for fused quartz glass undergo a generational paradigm shift.
Global chipmakers and compound semiconductor (SiC/GaN) foundries demand stringent transition metal thresholds. Conventional electric-melt silica is rapidly displaced by ultra-low-aluminum (≤5 ppm) and alkali-free quartzware, drastically mitigating thermal autodoping and lattice slip lines during extended chemical vapor deposition (CVD) cycles.
The acceleration of large-scale 300 mm (12-inch) and developing 450 mm silicon ingot processing dictates massive diffusion core tube profiles. Sourcing strategies now prioritize manufacturers capable of drawing single-piece continuous tubes exceeding 520 mm OD without circumferential wall variations or sagging distortion under high-temperature annealing.
Instead of manually assembled flame-welded labware prone to heat-affected zone failure, modern EPC contractors require 5-axis CNC ultrasonic-machined quartzware. Monolithic processing ensures zero joints, micro-grooved fluidics, and laser-inspected tolerances (±0.005 mm) that withstand cyclical plasma bombardment without flaking.
Procuring engineered quartz requires a quantitative analysis of thermal properties and elemental concentrations. Fused quartz synthesized from purified Donghai rock crystal delivers optimal cost-to-performance metrics across thermal expansion and softening gradients.
Download Complete Specification Guide| Physical / Chemical Property | Certified Standard Metric | Engineering Significance |
|---|---|---|
| SiO2 Chemical Purity | ≥ 99.995% (4N5 - 5N) | Eliminates microelectronic dopant migration |
| Coefficient of Thermal Expansion | 5.5 × 10−7 / °C | Immunity to extreme thermal shock (0–1,000°C) |
| Softening Point (Viscosity 10^7.6) | 1,683 °C | High-temperature envelope stability |
| Continuous Working Temperature | 1,100 °C – 1,250 °C | Extended operational lifespan in diffusion tubes |
| Hydroxyl (OH-) Content Range | < 5 ppm – 30 ppm (Custom) | Optimized for high infrared transmission clarity |
Located at the heart of China’s natural quartz cluster in Donghai County, Jiangsu, VEZLO Quartz Products Co., Ltd. spans over 33,000 m² (50 mu) of advanced processing facilities. With fixed assets exceeding RMB 10 million and an annual R&D commitment over RMB 5 million, we bridge raw mineral refining with high-precision fabrication.
Government-Endorsed Technology Leader: Selected for the Jiangsu Provincial Science & Technology Support Project for 320 mm semiconductor-grade quartz tubes, with our proprietary 520 mm large-bore furnace tubes passing national advanced material reviews.
Raw Mineral to Finished Assembly: Complete quality oversight across 13 certified grades of high-purity silica sand (≤20 ppm total metallic impurities), continuous thermal draw lines, and high-precision class 10,000 cleanroom final packaging.
Global Export Integrity: Multi-tiered drop-tested packaging featuring custom EVA pearl cotton inserts, fumigation-free solid timber crating, and guaranteed freight transit coverage across North America, the European Union, and East Asia.
Clear, engineering-backed answers addressing international standards, optical specifications, chemical compatibility, and logistics.
Natural fused quartz is produced by melting natural high-purity crystalline silica sand at ~2,000°C. It is cost-effective, exhibits exceptional structural integrity, and excels in high-temperature furnace applications. Synthetic fused silica is synthesized via chemical vapor hydrolysis of silicon halides (SiCl4). It features virtually zero heavy metals, exceptional transmission in deep ultraviolet (DUV down to 190 nm), and zero bubble inclusion, making it indispensable for high-end optical projection and semiconductor lithography.
Devitrification is primarily triggered by alkali metal impurities (Li, Na, K) on the quartz surface operating above 1,000°C. VEZLO eliminates this by enforcing rigorous raw mineral beneficiation (≤20 ppm total metal burden), executing multi-stage hydrofluoric acid pickling to eliminate surface contamination, and recommending clean dry-glove handling combined with high-purity nitrogen baking prior to furnace insertion.
Our standard manufacturing portfolio encompasses outer diameters (OD) from 2 mm to 500 mm. Under our specialized R&D development program for large-scale integrated circuit foundries, we produce custom continuous core tubes up to 520 mm OD with wall thicknesses customized from 1.5 mm to over 12 mm. Precision tolerances on straightness (≤1.5 mm/m) and ovality (≤1%) are certified via laser micrometer inspection.
Yes. By strategically doping natural silica melts with trace amounts of titanium dioxide (TiO2), our ozone-free quartz tubing absorbs shortwave ultraviolet radiation at the 185 nm line (which converts atmospheric oxygen into harmful ozone), while permitting maximum transmission of the potent 253.7 nm germicidal wavelength. This configuration is standard for medical-grade HVAC air sterilization and municipal water purification units.
Our engineering tooling center operates 5-axis CNC machining, ultrasonic milling, and CO2 laser contouring systems calibrated to standard CAD architectures. We natively accept DWG, DXF, STP, STEP, IGES, and dimensionally annotated high-resolution PDF engineering drawings. Prototype runs can typically be programmed and turned around within 3 to 5 business days.
Fragile quartzware is packed under a military-spec shock-isolation packaging protocol. Each individual tube or optical flat is vacuum-sealed in anti-static PE film, nested within bespoke CNC-routed high-density EVA or pearl cotton damping molds, placed inside double-wall corrugated buffer boxes, and finally bolted into heavy-duty fumigation-free composite timber crates equipped with tilt and impact recording indicators.