Custom-tailored quartz apparatus synthesized from ≥99.99% high-purity natural silica sand in Donghai. Built to withstand continuous thermal loads up to 1,150°C and transient operations reaching 1,350°C with near-zero thermal distortion.
Precision-blown circular cylinder crucible tank for high-temperature melting, vacuum sintering, and corrosive chemical containment with custom ground rims.
Ultra-flat quartz wafer holders engineered for X-Ray diffraction analysis, offering minimum background scatter and rigorous surface parallelism.
Cylinder guide rod engineered for laser collimation, industrial sensing, and semiconductor lithography with high total internal reflection efficiency.
Custom-bent dual-chamber quartz reactor container ideal for photocatalytic chemical synthesis, ozone oxidation, and pilot-scale decomposition.
Matte-finish fused silica cylinder providing uniform optical diffusion, infrared heat retention, and heavy-duty crucible furnace insulation.
Dual-bore heating chamber profile engineered for fast thermal processing, infrared heater filaments, and uniform chemical vapor deposition.
Custom-machined flange ring coupled with dual quartz tubes for high-vacuum sealing, plasma sputtering, and Alpine thin-film coating assemblies.
Direct screw-locking quartz pressure tube designed for analytical fluid paths, high-pressure digestion, and UV sterilizing reactors.
Why high-precision thermal applications in Schaan, Vaduz, and the Rhine Valley demand refined fused quartz over ordinary borosilicate or sintered alumina ceramic vessels.
Fused quartz glass features an extraordinary coefficient of thermal expansion (CTE) of approximately 5.5 × 10⁻⁷ / K between 20°C and 1,000°C. In real industrial foundry and sintering operations within Liechtenstein's advanced dental and metallurgy clusters, this allows crucibles to endure aggressive temperature differentials without catastrophic fracture. A fused quartz crucible heated red-hot to 1,100°C can be immediately plunged into cold water without micro-cracking, an operational envelope impossible with conventional technical ceramics or tempered glasses.
The transformation point of our fused quartz occurs at 1,075°C, with an annealing point at 1,215°C and softening temperature near 1,683°C. For vacuum melting and induction heating processes, Zelvo crucibles maintain strict geometric rigidity up to 1,150°C during prolonged heating protocols, and up to 1,350°C for short-duration sintering spikes.
A primary failure mode in high-temperature silica crucibles is devitrification—the nucleation and growth of crystalline cristobalite from the metastable vitreous silica matrix. Cristobalite undergoes a displacive α-to-β crystalline phase inversion at ~270°C accompanied by an abrupt volume contraction of nearly 5%, causing micro-crazing and vessel degradation upon cooling.
Zelvo Quartz addresses this kinetic vulnerability through two strict processing methodologies:
| Physical / Chemical Property | Zelvo Standard Fused Quartz | Synthetic Fused Silica (Optical) | Standard Alumina Ceramic (99% Al₂O₃) |
|---|---|---|---|
| Purity (SiO₂ Content) | ≥ 99.99% | ≥ 99.999% | N/A (< 0.1% SiO₂) |
| Density | 2.20 g/cm³ | 2.201 g/cm³ | 3.95 g/cm³ |
| Coefficient of Thermal Expansion (20-1000°C) | 5.5 × 10⁻⁷ / K | 5.2 × 10⁻⁷ / K | 80 × 10⁻⁷ / K (High Risk) |
| Continuous Safe Operating Temp | 1,100 °C | 1,150 °C | 1,600 °C |
| Thermal Shock Resistance | Extreme (>1000°C to cold water) | Extreme (>1100°C to cold water) | Moderate (Cracks upon rapid ramp) |
| Optical / Chemical Transparency | UV to IR (>90% from 260nm) | Deep DUV to NIR (>92% from 185nm) | Opaque / Impervious |
| Dielectric Strength (20°C, 1MHz) | 25 – 40 kV/mm | 30 – 50 kV/mm | 10 – 15 kV/mm |
Schaan represents a premier global engineering powerhouse in the upper Rhine Valley. Our quartz glass vessels and crucibles directly serve the municipal specialized manufacturing framework.
Schaan is internationally renowned as the epicentre of restorative dental engineering. The compounding of lithium disilicate, leucite-reinforced glass-ceramics, and biocompatible zirconia blocks requires melting in containers that impart zero heavy metal or alkali contamination. Our high-purity fused quartz crucibles maintain pristine chemical neutrality at 1,200°C–1,350°C, ensuring that translucency and refractive properties of dental prosthetics remain totally uncompromised.
The Rhine Valley (spanning Schaan, Balzers, and Buchs) hosts world-leading thin-film, PVD, and optical coating suppliers. Zelvo manufactures precise quartz liners, bell jars, and cylindrical evaporative crucibles for thermal and electron-beam deposition. Engineered for exceptional thermal uniformity under low pressures (< 10⁻⁵ mbar), our quartz components avoid off-gassing and resist adhesion cracking during precious-metal or dielectric stack runs.
Schaan's fastening, heavy construction tooling, and specialized metalworking industries depend on micro-grain carbide synthesis and specialty surface diffusion treatments. Our large-diameter quartz process tubes and cylindrical crucible tanks serve as internal reaction liners, protecting structural furnace furnaces from reactive corrosive halides and volatile metallic vapors during vacuum carbo-nitriding cycles.
Procurement directors in Schaan, St. Gallen, and Vorarlberg are adapting their high-temperature quartz component supply chains to tackle cost inflation, lead-time volatility, and purity mandates.
Traditional European distributors often levy 200–400% markups on bespoke quartz apparatus while carrying standard catalog dimensions that force Swiss and Liechtensteiner engineers into geometric compromises. Forward-thinking equipment builders in Schaan are transitioning directly to source-cluster factories in Donghai, China—the global center of silica raw-material processing.
By collaborating directly with Zelvo’s engineering group, local facilities obtain CAD-drawing-based prototypes starting from 1 piece, with custom wall-thickness tolerances down to ±0.05 mm, fully verified via CMM metrology before airfreight export.
As photonic devices, medical ceramics, and wafer coatings scale down in tolerance thresholds, micro-bubbles, air lines, and metallic inclusions within crucible walls can cause localized thermal spikes and unexpected micro-explosions under high vacuum.
Current purchasing guidelines across the Rhine Valley enforce strict DIN/ISO visual grading: Zero bubbles > 0.2 mm within critical optical paths and total iron (Fe) contaminants held below 0.2 ppm. Zelvo implements raw grain magnetic separation and double-distilled vacuum fusion to consistently beat these stringent European criteria.
Based in Donghai, Jiangsu—China’s Crystal Capital—Lianyungang Zelvo Quartz Products Co., Ltd. marries deep domestic silica mineral reserves with sophisticated CNC optical and laser fabrication.
Unlike simple trading outfits, Zelvo operates dedicated quartz cold-processing and high-temperature hot-working workshops. Our master glass artisans bring over a decade of hands-on expertise in hydrogen-oxygen torch flame manipulation, enabling complex circular tank welding, U-bends, ground-taper joints, and heavy-wall flange fusions that withstand 10⁻⁶ mbar vacuum seals.
With 100% response rates within 2 hours, multilingual engineering project managers, and DDP shipping into Liechtenstein (cleared through Swiss customs seamlessly), we strip friction out of intercontinental procurement.
Prototypes, experimental labware, and emergency replacements manufactured straight from your STEP/DWG files without tooling penalties.
Every piece undergoes optical polariscope stress analysis, micrometer wall verification, and bubble density mapping prior to crate dispatch.
Double-layered custom EPE contoured foam and IPPC-certified fumigated plywood crates ensure zero-breakage air and rail shipments.
Air freight door-to-door delivery into Schaan via Zurich (ZRH) or Basel (BSL) air hubs in as fast as 5 to 7 business days.
Essential technical, customs, and operational queries answered for procurement teams in Liechtenstein and the wider EFTA / Swiss economic territory.
Send our senior engineering team your 2D drawings (PDF) or 3D STEP models alongside target working temperatures and atmosphere conditions. We confirm manufacturing feasibility, tolerance control, and deliver an actionable quote within 2 hours.