Specialized Fused Quartz & Silica Labware for Nordic Engineering
Direct from our specialized high-purity cluster in Donghai to the cleanrooms, microelectronics hubs, and high-temperature metallurgical test facilities of Espoo, Finland.
Engineered for extreme high-vacuum conditions with superior optical transparency, zero bubble inclusion, and robust structural resistance to thermal stress.
Designed for high-pressure industrial thermal boilers and melting kilns, offering extreme tolerance against thermal shocks up to 1,100°C continuous.
Ultra-flat, deep-ultraviolet (DUV) transmitting synthetic-grade fused silica plates tailored for microelectronic lithography and precision optical masking.
Chemically inert, scratch-resistant inspection plates ensuring unhindered fluid and level monitoring within high-pressure hydraulic and lubrication systems.
CNC diamond-drilled and flame-polished aperture quartz discs used in thermocouple feedthroughs, electrode entries, and high-temp vacuum flanges.
High-precision double-sided optical flats with surface flatness reaching λ/4 to λ/10, essential for laser interferometry and optical test fixtures.
Custom-machined quartz rectangular plates with ground or beveled chamfered edges, widely deployed as substrate carriers in clean chemical wet-benches.
Features high laser-induced damage thresholds (LIDT) and near-zero thermal distortion for high-power fiber laser cutting heads and optical shielding.
High-Purity Fused Silica Crucibles: Strategic Value for the Espoo Market
Where Donghai Fused Silica Empowers Espoo's Industrial Landscape
Engineered to integrate seamlessly with standard Finnish laboratory and manufacturing protocols.
Semiconductor & Quantum Hardware
Direct support for cleanroom batch processing, thin-film annealing, LPCVD, and diffusion processes. Crucibles provide an inert vessel for dopant melts and high-purity semiconductor crystal synthesis where cross-contamination of iron or copper must remain under 0.1 ppm.
Advanced Cleantech & Battery Materials
Crucibles utilized in high-temperature solid-state electrolyte sintering and precious metal recovery. Silica crucibles resist harsh acidic vapors and molten salts during the thermal calcination of cathode active materials developed in Uusimaa innovation centers.
Optical Glass & Laser Crystal Synthesis
Espoo’s prominent photonics cluster relies on transparent quartz crucibles for specialized fluoride, tellurite, and chalcogenide optical glass melts requiring near-zero bubble defects and strict OH-content regulation to avoid infrared absorption peaks.
High-Precision Analytical Ashing & Fusion
Routine deployment in geotechnical, environmental, and mineralogical assay labs across the Helsinki Metropolitan Area. Fused silica crucibles ensure total chemical inertness to nitric, perchloric, and sulfuric acid digestions, maintaining analytical precision.
Emerging Procurement & Technical Trends in Southern Finland
Thermal & Physical Property Reference for Procurement Teams
| Critical Parameter | Typical Laboratory Value | Test Methodology / Standard | Application Significance for Process Engineers |
|---|---|---|---|
| Silicon Dioxide (SiO₂) Content | ≥ 99.99% | GDMS / ICP-OES Spectrum Analysis | Prevents migration of trace contaminants into high-purity melts. |
| Density | 2.20 ± 0.02 g/cm³ | ASTM C693 Archimedes Balance | Structural uniformity and consistent thermal inertia across the wall. |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ / °C (20°C – 320°C) | Dilatometry Thermal Analysis | Exceptional resistance to thermal shock during rapid furnace extraction. |
| Softening Point | 1,683 °C | ASTM C338 / Beam Bending | Ensures mechanical rigidity and anti-sagging under maximum thermal loads. |
| Annealing Point | 1,215 °C | Optical Stress Birefringence | Complete release of internal stress generated during flame lathe welding. |
| Continuous Operating Temperature | 1,100 °C | Prolonged Isothermal Exposure | Safe sustained service threshold for tubular and crucible furnace linings. |
| Total Impurities (Fe, Al, Ca, Mg, Na, K) | ≤ 20 ppm | Inductively Coupled Plasma Mass Spec | Minimizes structural devitrification and catalytic crystal growth. |
VEZLO Quartz: Manufacturing Powerhouse in Donghai
Combining raw regional resource domination with precision CNC cold processing and scientific research credentials.
33,000 m² Production Base
Situated in Donghai County, Jiangsu Province—China’s undisputed quartz epicenter. With RMB 10 million in fixed assets, our vertically integrated plant controls everything from raw sand purification to continuous tube melting, arc crucible fusion, and flame finishing.
Provincial S&T Project Leadership
Our pioneering 320 mm high-purity quartz tube for large-scale integrated circuit processing was developed under the prestigious Jiangsu Provincial Science & Technology Support Project. Furthermore, our 520 mm large-diameter tube has completed preliminary national review.
Direct OEM/ODM Drawing Precision
We manufacture custom labware, tubes (OD 2–500 mm), crucibles, and optical plates directly to your engineering drawings. Flame-worked flanges, custom ground joints, domed bottoms, and laser-slotted cleaning boats are executed to tight tolerances.
≤20 ppm Raw Sand Purification
We produce 13 distinct grades of ultra-high-purity quartz sand with total metallic impurities below 20 ppm. Sourcing directly from the origin eliminates intermediary markups and guarantees absolute material consistency across all molten crucible bodies.
Onsite-Verified & Export Compliant
Premises inspected and validated onsite by third-party international verification agencies. Orders are fully safeguarded via secure Trade Assurance with an established 50% repeat order rate from buyers across Germany, the UK, the US, and the Nordic markets.
Shock-Proof Export Logistics
Delivering high-fragility glassware internationally requires engineered packaging. Each crucible and viewport is secured with custom-molded high-density pearl cotton and sealed in non-fumigation plywood crates designed for smooth air and sea cargo handling directly to Helsinki-Vantaa.