Export Inventory & Custom Fabrication
Featured Quartz Glass Components for High-Precision Engineering
Certified 99.99% high-purity SiO₂ fused silica engineered for extreme thermal shock, deep ultraviolet transmission, and stringent chemical inertness across industrial systems.
99.99%
SiO₂ Chemical Purity
1200°C
Thermal Shock Threshold
≤2h
Direct Technical Response
43%
Verified Global Re-Order Rate
Engineering White Paper
Fused Quartz Disc Precision Machining: Principles and Specifications
In modern industrial manufacturing, optical inspection, and vacuum chamber engineering, quartz glass discs are not simply sight windows; they function as primary physical barriers under ultra-high thermal stress, severe chemical environments, and mechanical pressure differentials. Sourced from Donghai County, China—recognized globally as the epicenter of natural quartz refinement and advanced synthetic silica synthesis—Zunex Quartz delivers specialized optical-grade and thermal-grade quartz discs engineered to exceed international standards such as ASTM C693, DIN 1259-1, and ISO 3585.
Unlike standard soda-lime or borosilicate glass varieties, fused silica consists entirely of silicon dioxide (SiO₂) in an amorphous, non-crystalline network. This molecular uniformity provides an extraordinarily low coefficient of thermal expansion (CTE) of 5.5 × 10⁻⁷ /°C within the thermal span of 20°C to 1000°C. For industrial facilities operating throughout the Jakarta metropolitan perimeter—spanning Cikarang, Karawang, MM2100, and Pulogadung—this specific property eliminates the catastrophic micro-cracking and optical distortion caused by cyclic thermal shocks in metallurgical boilers, CVD reactor sight windows, and high-intensity ultraviolet curing systems.
| Physical & Optical Parameter | JGS1 (Synthetic Fused Silica) | JGS2 (Optical Grade Quartz) | JGS3 (Infrared Fused Quartz) |
|---|---|---|---|
| Primary Spectral Bandwidth | Deep UV to Near IR (185 nm – 2,500 nm) | Standard UV to Visible (220 nm – 2,500 nm) | Visible to Mid-Infrared (260 nm – 3,500 nm) |
| Hydroxyl Group (OH⁻ Content) | ≤ 10 ppm (or high OH custom ≤ 1200 ppm) | ≤ 150 – 200 ppm | ≤ 5 ppm (Water-free IR grade) |
| Continuous Working Temperature | 1,100 °C | 1,100 °C | 1,150 °C |
| Maximum Peak Temperature | 1,300 °C | 1,300 °C | 1,350 °C |
| Surface Quality / Parallelism | 40/20 or 20/10 Scratch-Dig; < 10 arcsec | 60/40 Scratch-Dig; < 30 arcsec | 60/40 or 80/50; Commercial to Precision |
| Typical Target Applications | UV laser viewports, photolithography, UV-C sterilizers | Sight glasses, laboratory instruments, furnace windows | Infrared heating pyrometry, gas sampling, thermal sensors |
Each quartz disc exported to the Indonesian commercial market undergoes strict cold-machining protocols, including diamond-wheel core drilling, CNC planetary lapping, double-sided optical polishing (chemical-mechanical planarization), and laser edge chamfering. For disc thicknesses ranging from 0.5 mm up to 50 mm, dimensional tolerances are routinely governed to ±0.05 mm, with wavefront distortion preserved below λ/4 per 25 mm diameter at 632.8 nm.
Regional Industrial Synergy
Localized Industrial Applications Across Greater Jakarta
Precision quartz discs tailored to the operational demands of manufacturing corridors in Jabodetabek, Karawang, and Banten.
Petrochemical & Refinery Viewports (Cilegon & Banten)
High-pressure synthesis reactors and refining fractionators located along the coastal Banten corridor rely on heavy-walled JGS2 quartz sight glasses. Their resistance to acidic atmospheres (except HF) prevents clouding and embrittlement under continuous steam pressures exceeding 3.5 MPa.
Semiconductor, PCB & Electronics (Cikarang & MM2100)
Electronics packaging, surface-mount technology (SMT), and cleanroom components require high-purity quartz carrier wafers, circular discs, and bell jar bases. Absolute trace metal suppression (≤ 0.1 ppm Na, K, Fe) safeguards semiconductor yields from ionic migration.
Automotive Heat Treatment & Powder Metallurgy (Karawang)
Tier-1 automotive component manufacturing hubs throughout Karawang employ our fused silica observation discs inside continuous carburizing and nitrogen-atmosphere sintering furnaces, facilitating precise thermal radiation monitoring up to 1150 °C.
Textile & Packaging UV Curing Lines (Tangerang & Pulogadung)
Industrial UV curing chambers require high-transmission quartz disc filter plates. The deep-UV transmission (> 90% at 254 nm and 365 nm) accelerates photoinitiator cross-linking while insulating sensitive polymer substrates from raw infrared thermal build-up.
Research Centers & Calibration Laboratories (Bandung & Jakarta)
BRIN (National Research and Innovation Agency) and university material characterization labs utilize custom optical quartz discs for spectrophotometric sample holders, XRD zero-background plates, and specialized ellipsometric analysis cells.
Solar Photovoltaic Cell Assembly & Wafer Fabrication
Supporting Indonesia's transition toward domestic green energy and solar wafer manufacturing, our custom stepped quartz discs serve as durable carrier fixtures during thin-film PECVD coating processes.
Market Dynamics & Future Outlook
Key Trends Governing Quartz Component Sourcing in Jakarta
Analysis of industrial modernization trends impacting procurement strategies across Indonesian manufacturing clusters.
1. Transition Toward Automated Optical Inspection (AOI)
Industrial robotics lines across Bekasi and Karawang assembly plants are increasingly deploying machine vision systems. These systems require scratch-free optical quartz protective discs with anti-reflective (AR) multi-layer thin-film coatings. Standard float glass degrades camera resolution and exhibits birefringence; synthetic fused silica ensures high contrast across broad spectral imaging channels without wave interference.
2. Shift from Domestic Stockists to Direct Mill Procurement
Procurement teams in Jakarta are shifting away from intermediaries toward certified source-level manufacturers. This avoids the 30%–45% markups charged by multi-tier trading intermediaries in Glodok and Surabaya, ensures traceable material certification (RoHS, REACH, and Chemical Assay Reports), and enables direct CAD-to-CNC custom fabrication.
3. Upgrade of Municipal Water & Food-Beverage UV Systems
With stricter environmental mandates governing wastewater discharge across industrial zones like Jababeka and MM2100, manufacturing plants are retrofitting heavy industrial UV sanitizers. Large-diameter JGS1 fused silica discs serve as protective lenses directly exposed to short-wave 254 nm UV-C lamps, resisting solarization and yellowing over extended operating cycles.
4. Expansion of Domestic Semiconductor & Battery Assembly
Indonesia's strategic initiatives targeting electric vehicle (EV) battery packs and domestic semiconductor component assembly have increased the demand for high-purity quartz substrates, chemical vapor deposition (CVD) rings, and precision slotted quartz discs that maintain chemical stability under aggressive acid cleaning baths (aqua regia and piranha solution).
Why Partner With Zunex Quartz
Manufacturing Authority & Export Infrastructure
Decades of specialized processing expertise, verified by independent international trade registries.
Donghai Manufacturing Base
Direct supply from China's premier crystal and quartz cluster, ensuring pure natural rock crystal feedstock, high manufacturing capacity, and stable raw material costs.
Advanced Laser Finishing
Specialized CNC laser micro-drilling, edge grooving, flanging, step grinding, and chemical fire-polishing capabilities, custom-machined directly from your CAD/STEP files.
Verified Export Reliability
A proven 100% inquiry response rate (averaging under 2 hours) and a 43% repeat-order rate from international industrial buyers across Asia, Europe, and the Americas.
Zero-Breakage Export Crating
Multi-layer shock-absorbent closed-cell foam inserts, hermetic vacuum-sealed barrier pouches, and fumigated solid timber export crates designed for reliable maritime and air freight to Tanjung Priok and Soekarno-Hatta.
Procurement Knowledge Base
Frequently Asked Questions by Indonesian Engineering Teams
Direct technical answers addressing customs, dimensional tolerances, material selection, and logistics protocols.
How do we distinguish between JGS1, JGS2, and JGS3 quartz discs for Jakarta plant orders?
The distinction lies in optical transmission and hydroxyl (OH⁻) content. JGS1 is a high-purity synthetic fused silica transmitting light from the deep UV to the near-infrared spectrum (185–2500 nm), free of bubbles and inclusions, making it suitable for laser optics and UV-C disinfection viewports. JGS2 is optical-grade fused quartz made from natural quartz crystal, transmitting from 220 nm to 2500 nm, providing a cost-effective solution for furnace observation windows and chemical reactor sight glasses. JGS3 is a water-free infrared grade quartz with OH content below 5 ppm; it extends light transmission up to 3500 nm, preventing water-absorption bands (at 2.73 μm) and making it ideal for infrared pyrometry windows and heating equipment.
Can custom dimensions, holes, and stepped edges be machined to our technical drawings?
Yes. Custom fabrication from client drawings is our core capability. We accept CAD files in PDF, DWG, DXF, or 3D STEP formats. We can fabricate circular discs, elliptical windows, annular rings, stepped viewports, and counter-bored mounting holes. Our CNC laser processing and diamond grinding achieve diameter tolerances within ±0.05 mm, thickness tolerances down to ±0.02 mm, and surface flatness to λ/4, complete with beveled ground or fire-polished edges.
What are the import clearance procedures, HS codes, and logistics options for Jakarta delivery?
Industrial quartz discs and sight glasses are typically classified under HS Code 7002.39.00 (Quartz Glass Tubes/Pipes) or 7006.00.00 / 7017.10.00 (Laboratory, Hygienic or Pharmaceutical Glassware of Fused Quartz). We regularly supply all required shipping documents—including the Commercial Invoice, Packing List, Certificate of Origin (COO), and Material Quality Certificate—to support smooth customs processing via Tanjung Priok Port (ocean freight) or Soekarno-Hatta Airport (air express/air cargo via DHL/FedEx). We coordinate directly with your designated PPJK (Customs Clearance Broker) or handle deliveries under standard Incoterms (EXW, FOB, CIF, or DDP).
How are fragile quartz discs protected against breakage during transit to Southeast Asia?
We use a specialized five-layer export packaging protocol. Individual quartz discs are first cleaned and wrapped in non-static optical protective film, then placed inside custom-cut high-density EPE shock-absorbent foam inserts. Multiple units are secured in moisture-resistant inner cartons and sealed within heavy-duty, fumigated ISPM-15-compliant wooden cases. This packaging ensures verified zero-breakage rates even across multi-leg sea and domestic truck journeys through Jakarta's industrial corridors.
What is the minimum order quantity (MOQ) and production turnaround for custom discs?
To support prototyping, research initiatives, and scheduled maintenance, we do not impose an arbitrary high MOQ—trial orders for 1 to 5 prototype units are welcomed. Standard custom disc fabrication takes 7 to 10 working days, while catalog sizes ship in 3 to 5 working days. Air shipments to Jakarta typically arrive in 3 to 5 business days after departure, keeping emergency plant downtime to a minimum.