Featured High-Purity Fused Quartz Products
Precision-engineered fused quartz rods, discs, plates, crucibles, and process tubes manufactured in compliance with ISO 9001 standards for immediate delivery to the Greater Stockholm region.
Clear Transparent Quartz Rod 4-42mm Diameter Polished Fused Silica Bar 1100 Degrees Centigrade Decoration Glass
High-purity flame-polished fused silica bars engineered for optical waveguide applications, semiconductor process fixtures, and high-temperature thermal barriers operating continuously up to 1100°C.
Clear Fused Silica Quartz Glass Plate Transparent Square 0.5-100mm for Optical Semiconductor Industry
Double-side optical polishing with ultra-low thermal expansion. Designed specifically for semiconductor photolithography, wafer handling substrates, and high-vacuum viewport discs.
Clear Fused-Quartz Melting Crucibles with Fire-Polished Rims for High-Temperature Laboratory Muffle Furnaces
Thermal shock resistant quartz crucibles designed for material synthesis, alloy melting, and laboratory muffle furnace operations at temperatures reaching 1450°C short-term.
Precision Optical Fused-Quartz Square Plates with Chamfered Edges for Semiconductor Photomask Windows
Precision CNC-machined synthetic quartz substrates featuring chamfered safety edges, flat surface figure (λ/10), and exceptional Deep UV (DUV) optical transmission.
Optical Cobalt Blue Glass Disc Circular Filter Furnace Sight Glass Window
Specialized optical filter sight glass discs for high-temperature furnace monitoring, flame spectroscopy, and thermal isolation windows across industrial heating plants.
High Temperature Resistant Quartz Glass Circular Silica Custom Size Cutlery Use
Custom-machined circular quartz silica discs and plates providing exceptional chemical inertness, high mechanical strength, and zero outgassing for cleanroom process containment.
4-Inch US Quartz Sand Fused Crucibles with Fire-Polished Rim for High-Temperature Semiconductor Ingot Melting
Manufactured from high-purity imported quartz sand, optimized for silicon ingot growth, photovoltaic crystallization, and high-purity chemical reaction vessels.
Precision Flat-Cut Fused-Quartz Straight Process Tubes with 90-Degree Squared Ends for Vacuum CVD Chambers
High-dimensional-accuracy quartz process tubes with 90-degree square-cut fire-polished ends, engineered specifically for chemical vapor deposition (CVD) and vacuum oxidation chambers.
Deep Industry Technical Whitepaper: Precision Quartz Glass Discs for Stockholm's Advanced Technology Ecosystem
In modern industrial manufacturing and high-tech research, fused quartz glass discs serve as fundamental components across demanding environments where standard glass formulations—such as soda-lime or borosilicate—fail. Stockholm, as Sweden's primary innovation hub encompassing Kista Science City, the KTH Royal Institute of Technology, Karolinska Institutet, and the surrounding Mälardalen industrial corridor, requires glass substrates capable of surviving extreme thermal shocks, corrosive chemical baths, high-power laser irradiation, and ultra-high vacuum (UHV) atmospheres.
As a specialized manufacturer and global exporter, Donghai Kemzo Quartz Products Co., Ltd. delivers high-purity synthetic and natural fused silica quartz glass discs directly to research laboratories, semiconductor fabs, and OEM equipment manufacturers across Stockholm. Our quartz glass discs are precision-machined from raw materials harvested in Donghai County—the recognized "Crystal Capital of China"—and finished using advanced double-sided optical lapping, CNC ultrasonic profile drilling, and thermal stress-relief annealing.
1. Material Science & Material Grade Differentiation (Information Gain Matrix)
To select the correct quartz disc for a specific application in Stockholm, engineers must evaluate material synthesis methods, optical transmittance bands, and hydroxyl ion (OH⁻) concentrations. We manufacture quartz discs across three distinct optical grades (JGS1, JGS2, JGS3):
- JGS1 (Synthetic Fused Silica): Manufactured via chemical vapor deposition (CVD) using high-purity silicon tetrachloride ($\text{SiCl}_4$). It contains zero metallic impurities and possesses an extremely low hydroxyl content ($\text{OH}^- \le 5 \text{ ppm}$ or high OH variants up to $1000 \text{ ppm}$). JGS1 offers exceptional deep ultraviolet (DUV) transmission down to 185 nm, making it the ideal choice for UV-C water purification systems, photolithography mask windows, and excimer laser optics in Stockholm research centers.
- JGS2 (Fused Quartz from Natural Crystal): Produced by flame-melting purified natural quartz crystals. JGS2 delivers outstanding optical transmission across the visible spectrum (320 nm to 2500 nm) with minimal bubble density (ISO 12123 Class 1–2). It is widely utilized as high-temperature furnace viewports, plasma process sight glasses, and microfluidic analysis substrates.
- JGS3 (Infrared Grade Fused Quartz): Melted under electrical vacuum furnace conditions to drastically reduce $\text{OH}^-$ ions below 10 ppm. This eliminates the deep absorption band at 2.73 µm, enabling high optical transmission extending into the Mid-Infrared (MIR) spectrum up to 3.5 µm. Ideal for Stockholm-based FTIR spectroscopy, thermal imaging viewports, and CO2 laser process optics.
Material Performance Specification Matrix
A rigorous engineering comparison of Donghai Kemzo Fused Quartz versus alternative technical glass materials.
| Physical / Technical Property | JGS1 Synthetic Silica | JGS2 Natural Fused Quartz | Borosilicate Glass 3.3 | Synthetic Sapphire ($Al_2O_3$) |
|---|---|---|---|---|
| $\text{SiO}_2$ Purity Level | > 99.999% | > 99.99% | ~ 81% ($\text{SiO}_2$) | N/A ($\text{Al}_2\text{O}_3$ 99.99%) |
| Continuous Operating Temp. | 1100 °C | 1100 °C | 450 °C | 1600 °C |
| Short-Term Peak Temp. | 1450 °C | 1350 °C | 500 °C | 1900 °C |
| Coeff. of Thermal Expansion (CTE) | $5.5 \times 10^{-7} / \text{K}$ | $5.5 \times 10^{-7} / \text{K}$ | $3.3 \times 10^{-6} / \text{K}$ | $5.8 \times 10^{-6} / \text{K}$ |
| Thermal Shock Resistance ($\Delta T$) | 1000 °C Quench to Water | 1000 °C Quench to Water | 160 °C Quench | 300 °C Quench |
| UV Transmission Cut-Off | 185 nm (DUV) | 220 nm (UV) | 310 nm (NUV) | 190 nm (DUV) |
| Surface Roughness ($R_a$) Options | < 0.5 nm (Angstrom-Level) | < 1.0 nm (Optical Polish) | ~ 2.0 nm | < 0.5 nm |
| Acid Resistance (except HF) | Class 1 (Ultra High) | Class 1 (Ultra High) | Class 1 | Class 1 |
2. Localized Application Scenarios Across Stockholm's Industrial Hubs
Stockholm’s economic and technological structure requires highly tailored quartz disc geometries and surface specifications. As a direct supplier to Stockholm, we customize quartz discs according to exact CAD drawings (DWG/STEP/PDF) for the following localized sector applications:
Semiconductor & Photonic Wafer Fabrication (Kista Hub)
Kista Science City is world-renowned for microelectronics, photonics, and quantum device research. Our optical JGS1 synthetic quartz discs are used as zero-outgassing photomask blanks, plasma etch chamber viewports, and carrier wafers. Featuring flat surface figures ($\lambda/10$) and scratch-dig specifications down to 10-5, these discs minimize optical distortion during extreme UV exposure and dry plasma processing.
Biomedical Instrumentation & Life Sciences (Karolinska Ecosystem)
The Greater Stockholm life science cluster relies on quartz glass discs for fluorescence spectroscopy, HPLC micro-flow cell windows, and cell culture analysis substrates. Quartz discs provide near-zero background autofluorescence under UV/Visible excitation, ensuring accurate analytical measurements for pharmaceutical R&D, gene sequencing, and diagnostic instrument manufacturing.
High-Temperature Vacuum Furnaces & Thermal Engineering
Industrial processing facilities throughout Stockholm and the neighboring Mälardalen region use our heavy-wall fused quartz sight glass discs for high-vacuum annealing, sintering, and metal heat treatment furnaces. With a continuous working thermal threshold of 1100°C and a thermal expansion coefficient of only $5.5 \times 10^{-7}/\text{K}$, our quartz sight glass discs withstand extreme temperature fluctuations without shattering or crazing.
UV-C Water Purification & Municipal Disinfection Systems
Stockholm’s commitment to sustainable environmental technologies drives demand for UV-C water treatment systems. Our JGS1 clear quartz discs act as protective quartz windows for high-power germicidal UV LED arrays (254 nm and 222 nm far-UV-C). They deliver maximum UV light transmittance (>90% at 254 nm) without solarization or degradation over thousands of operational hours.
3. Emerging Industrial Trends in Sweden & Procurement Requirements for Stockholm Buyers
The Swedish industrial purchasing landscape emphasizes sustainability, supply chain traceability, and exact quality compliance. Stockholm buyers are increasingly replacing traditional borosilicate glass with fused quartz glass discs to achieve higher energy efficiency and extended component service life under harsh processing conditions.
Key market drivers currently shaping demand in Stockholm include:
- Transition to Green Energy & Power Electronics: The expansion of wide-bandgap semiconductor manufacturing (SiC and GaN) in Sweden requires ultra-pure quartz furnace tubes, boat carriers, and optical monitoring discs capable of operating reliably above 1000°C without introducing trace alkali metal contaminants ($\text{Na}, \text{K}, \text{Li} \le 1.5 \text{ ppm}$).
- Zero-PFAS & Chemical Compliance: Fused quartz discs offer absolute chemical inertness against concentrated nitric, sulfuric, and hydrochloric acids, serving as ideal substitutes for fluoropolymer-lined viewports in chemical processing and laboratory analytical gear.
- Precision Customization & Rapid Prototyping: Stockholm research institutes often require short production runs of non-standard quartz disc dimensions, ranging from 5 mm micro-discs to 400 mm large-diameter furnace viewport covers, featuring custom edge chamfers, step-bores, and anti-reflective (AR) optical coatings.
4. Manufacturing Capabilities & Engineering Advantages of Donghai Kemzo
Located in Donghai County, Jiangsu, China, Donghai Kemzo Quartz Products Co., Ltd. combines raw material sourcing advantages with advanced precision glass processing capabilities. Operating under an ISO 9001 certified quality system and recognized as a Jiangsu High Technology Enterprise, we provide end-to-end manufacturing for global export:
- Precision Machining Capabilities: CNC ultrasonic profiling, core drilling, step grinding, laser edge chamfering, and fire-polishing rim finishing.
- Optical Lapping & Polishing: Double-side planetary lapping machines achieving parallelism down to < 3 arcseconds, flatness to $\lambda/10$, and surface roughness $R_a < 0.5 \text{ nm}$.
- Strict Quality Control Protocols: 100% dimensional measurement using optical comparators, strain gauge stress-birefringence analysis, spectrophotometer transmission testing, and cleanroom packaging.
- Logistics & Export Handling for Stockholm: Specialized multi-layer shock-absorption packaging inside heavy-duty timber cases, ensuring damage-free express air freight directly to Stockholm Arlanda Airport (ARN) or maritime shipping via Port of Stockholm.
Frequently Asked Questions for Stockholm Procurement Teams
Detailed technical and commercial answers tailored for Swedish engineers and purchasing managers.
What optical grade of quartz disc should I select for UV-C applications in Stockholm?
For Deep UV (DUV) applications operating at 254 nm or 222 nm (far-UV-C), we strongly recommend **JGS1 Synthetic Fused Silica Discs**. JGS1 exhibits over 90% transmission at 254 nm and maintains high solarization resistance under prolonged ultraviolet radiation exposure, whereas standard natural quartz or borosilicate glass absorbs UV light and degrades over time.
How do your quartz glass discs perform under extreme thermal shock?
Our fused quartz discs feature an extremely low thermal expansion coefficient ($5.5 \times 10^{-7}/\text{K}$ between 20°C and 300°C), which is roughly 1/6th that of borosilicate glass. As a result, a quartz disc can be heated to 1000°C and immediately quenched in cold water without cracking or breaking, making it exceptional for thermal process viewports.
What custom tolerances can Donghai Kemzo achieve for custom quartz discs?
We can achieve tight engineering tolerances based on your custom technical drawing: Diameter tolerance down to $\pm 0.05 \text{ mm}$, thickness tolerance down to $\pm 0.02 \text{ mm}$, parallelism < 5 arcseconds, surface quality scratch-dig 20-10 or 10-5, and surface flatness up to $\lambda/10$ per 25 mm diameter.
What is the typical shipping lead time from China to Stockholm?
Standard prototype or small-batch custom quartz disc orders are produced within 7 to 10 business days. For urgent Stockholm deliveries, express air freight via DHL, FedEx, or UPS delivers shipments to Stockholm within 4 to 6 working days. We provide comprehensive export documentation, commercial invoices, and customs harmonization codes (HS Code: 7002.31 / 7006.00).
How do you prevent breakage during international transit to Sweden?
Fragile quartz glass items are protected individually using vacuum-sealed cleanroom packaging, shock-absorbing high-density polyethylene (PE) foam inserts, individual corrugated inner boxes, and reinforced export wooden cases. Every consignment is insured during international transit.
Request Your Custom Technical Quote & Specification Catalog
Send your engineering drawings or specification sheets directly to our optical engineers. Receive technical feasibility reviews, optical material recommendations, and competitive factory-direct quotes within 1 hour.