Fabricated from Donghai’s refined crystalline feedstocks with total metallic impurities below 20 ppm. Our optical plates, precision rods, and high-temperature observation windows maintain dimensional stability up to 1,200°C.
Precision double-side polished fused silica plate providing >92% optical transmittance across UV to near-infrared spectra.
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Ultra-thin, micrometer-calibrated clear quartz substrates suited for harsh environmental sensors and thermal insulation covers.
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Custom profile laser cutting yielding ultra-clean edge finishes, crack-free bevels, and tight geometric tolerances of ±0.05 mm.
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Machined O-ring sealing grooves designed for high-vacuum geothermal exploration vessels and chemical separation columns.
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High dielectric strength corona discharge tubes customized for water purification, recirculating aquaculture systems, and odor abatement.
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Surface roughness Ra < 0.5 nm with minimal alkaline impurities, ideal for thin-film sputtering, lithography, and power electronics.
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Engineered observation ports enduring continuous autoclave pressures up to 10 MPa and aggressive chemical attack from acidic brine.
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Interferometer-verified surface flatness of λ/4 to λ/10, serving as optical calibration masters in laboratory measurement cells.
Inspect Details →Hafnarfjörður occupies a critical junction in Iceland’s industrial matrix: bridging primary metallurgy at Straumsvík, extensive maritime operations along the Faxaflói bay, and geothermal energy testbeds expanding across the Reykjanes volcanic rift.
Iceland’s geothermal power facilities harness superheated steam and supercritical fluids that routinely exceed 350°C and 22 MPa downhole pressures. Standard borosilicate glasses or polymers suffer severe chemical leaching and devitrification within hours when exposed to geothermal fluid streams rich in hydrogen sulfide (H2S), dissolved silica, carbon dioxide, and chloride salts. Clear fused quartz rods act as solid optical light pipes and downhole sensor guides, transmitting critical infrared and Raman spectroscopy signals from borehole probe heads to surface spectrometers.
VEZLO’s solid fused quartz rods (ranging from Ø3 mm to Ø40 mm) offer near-zero thermal expansion (5.5 × 10-7 /°C), entirely eliminating internal stress fracturing during rapid cold-water well flush cycles. When serving geothermal plants supplying Hafnarfjörður and the greater Capital Region, our clear rods provide continuous optical verification of turbine steam purity, phase changes, and non-condensable gas concentrations without degradation.
Installed in and around the Straumsvík aluminium smelting sector, clear quartz rods serve as non-conductive, electromagnetic-immune light guides for optical pyrometers monitoring reduction potlines. Their resistance to fluorinated off-gases and thermal shocks up to 1,100°C ensures reliable bath temperature logging.
Hafnarfjörður's state-of-the-art aquaculture and algae photobioreactors leverage our UV-transparent clear quartz rods as internal light-distributing waveguides. Transmitting up to 90% at 254 nm germicidal bands, they provide targeted pathogen neutralization without releasing microplastics or metal ions.
In geothermal gas scrubbing and carbon capture pilot programs operating along the volcanic belt, our grooved quartz discs and stir rods withstand high-pressure CO2 mineralization reactors, ensuring neutral chemical environments for precise kinetic studies.
Procurement engineers in Hafnarfjörður require absolute consistency in thermal shock tolerance, OH content, and optical dispersion. Review our primary quality control metrics verified under ISO 9001 and high-precision spectroscopy.
| Physical / Thermal Parameter | Testing Protocol / Standard | VEZLO Clear Fused Quartz |
|---|---|---|
| Chemical Purity (SiO2) | ICP-OES / GD-MS | ≥ 99.992% |
| Coefficient of Thermal Expansion (CTE) | 20°C to 320°C (Dilatometry) | 5.5 × 10-7 cm/cm°C |
| Continuous Operating Temperature | ASTM C336 Standard | 1,100 °C |
| Peak Short-Term Service Temp | Devitrification Resistance Window | 1,280 °C |
| Annealing Point | Viscosity log η = 13.0 | 1,215 °C |
| Softening Point | Viscosity log η = 7.6 | 1,683 °C |
| Thermal Shock Quench Resistance | 1,100°C dropped into 20°C water | No micro-fissuring |
| Dielectric Strength (20°C) | 1 MHz Dielectric Breakdown | 25–40 kV/mm |
| Hydroxyl (OH-) Concentration | FTIR (Standard vs. Low OH options) | < 5 ppm to 30 ppm |
Our facility combines continuous thermal drawing towers with high-precision computer numerically controlled (CNC) abrasive machines capable of tailoring quartz rods and plates to bespoke Nordic industrial requirements:
Analyzing how decarbonization policies, green technology parks, and advanced marine ventures are transforming industrial procurement throughout the Reykjanes peninsula and Greater Reykjavík area.
Iceland's primary metals industry is piloting inert anode technologies and carbon-neutral potline retrofits. These developments generate higher operating temperatures and require continuous optical pyrometry and plasma analysis, fueling demand for thermal shock-resistant quartz rods capable of non-contact infrared thermal monitoring in Straumsvík.
Land-based fish farming clusters expanding around Hafnarfjörður prioritize zero chemical discharge. High-power UVC disinfection reactors equipped with synthetic clear quartz protective sleeves and wave-guiding rods prevent waterborne bacterial spread without biocides, aligning with stringent North Atlantic environmental mandates.
The Iceland Deep Drilling Project explores 400°C–500°C supercritical geothermal zones. Sensor assemblies require custom-machined optical quartz disc observation windows and solid fused silica light conduits able to maintain structural integrity under extreme downhole tectonic and hydraulic loads.
Operating from our 50-mu (≈33,000 m²) production base in Donghai County—China's recognized quartz capital—VEZLO controls every phase from high-purity crystalline sand synthesis to flame-worked glass instruments.
Selected for the Jiangsu Provincial Science & Technology Support Project for 320 mm high-purity semiconductor quartz tubes, and recently developed 520 mm large-diameter furnace tubes.
We produce our own 13 grades of ultra-high-purity quartz sand with total metallic impurities ≤ 20 ppm, ensuring zero internal bubble clustering, micro-inclusions, or color shifts.
Specialized multi-layer pearl cotton, high-density vacuum envelopes, and shock-cushioned fumigation-free plywood crates prevent North Atlantic maritime transport fracture.
Our dedicated engineering export desk reviews 2D/3D CAD drawings (STEP, DWG, DXF) with a verified sub-2-hour turnaround time, maintaining a 50% repeat client purchase rate.
Direct answers to the most common questions raised by Icelandic procurement officers, lab researchers, and plant maintenance directors.
For critical R&D batches, prototypes, and urgent maintenance replacements, express air shipments (DHL/FedEx) arrive at Keflavík International Airport (KEF) within 4 to 7 business days. For volume container shipments, sea freight routed via Rotterdam or Hamburg to the Port of Hafnarfjörður or Sundahöfn (Reykjavík) typically averages 28 to 35 days, with complete customs-ready fumigation documentation.
Our clear quartz rods possess an SiO2 purity of ≥99.99%, presenting a fully polymerized, non-porous amorphous silica tetrahedral matrix. Unlike soda-lime or borosilicate glass containing network modifiers (Na, B, Ca) that leach out in acidic hydrogen sulfide and saline brines, fused quartz is chemically inert to all acids (except hydrofluoric and hot phosphoric acid at elevated temperatures), guaranteeing long optical life in geothermal wells.
Yes. Beyond standard cylindrical cutting and optical planar polishing, our in-house master glassblowers flame-work custom features including spherical lens ends, ground tapered joints, through-holes, stepped diameters, sealing lips, and high-vacuum CF flanges welded directly onto clear quartz rods according to your engineering drawings.
While quartz has near-zero thermal expansion and cannot crack from cold temperatures alone, mechanical shocks during winter logistics are severe. Each quartz rod and plate is individually sealed in moisture-barrier anti-static foam, cradled in custom high-density EPE shock absorption channels, and suspended inside reinforced, ISPM-15 compliant plywood cases engineered to withstand rough sea transits.
Every shipment arrives with a comprehensive Quality Inspection Certificate, Material Spectrographic Composition Report (verifying impurity ppm levels), Dimensional Inspection Sheets, and international commercial invoices with exact HS Codes (typically 7002.39 for quartz rods or 7002.32 for tubes) to streamline import customs clearance with Icelandic tax and customs authorities (Skatturinn).
Natural fused quartz is produced by electric-arc or gas melting of natural crystalline quartz sand. It provides remarkable thermal resistance (1,100°C continuous) at economical cost, ideal for furnace carriers, sight glasses, and pyrometry rods. Synthetic fused silica is synthesized via chemical vapor deposition of silicon halides (SiCl4), resulting in virtually zero metallic trace impurities and superior deep-ultraviolet transmission down to 190 nm for advanced laser and semiconductor optics.