Direct From Donghai Factory
Engineered Quartz Glass Solutions for Advanced Manufacturing
Fabricated with ≥99.99% high-purity natural silica sand in Donghai, China. Custom tolerances up to ±0.01 mm, ready for express air freight and consolidated LCL/FCL ocean delivery directly to Bien Hoa industrial parks.
Bien Hoa & Dong Nai Industrial Landscape
Bridging Global Supply Chains: High-Performance Quartzware for Southern Vietnam
Bien Hoa City serves as the industrial engine of Dong Nai province, strategically situated in Vietnam's Southern Key Economic Zone. Boasting landmark industrial hubs like Bien Hoa 1, Bien Hoa 2, Amata Industrial City, and Loteco, the region has transitioned from heavy manufacturing toward high-tech electronics assembly, semiconductor packaging, photovoltaic solar module fabrication, and precision chemical engineering.
High-end thermal and optical processes in these zones rely intrinsically on fused quartz and fused silica. Ordinary borosilicate glass fails when exposed to continuous operating temperatures above 500°C or subjected to aggressive plasma and acid vapors. As a dedicated Chinese manufacturer with verified export capabilities, our Donghai production facility provides direct, factory-cost engineered quartz components specifically tailored to the demanding operating environments of Bien Hoa plants.
Whether your application requires replacement combustion tubes for metallurgical QC laboratories, diffusion carriers for wafer fabrication lines, or UV sight glasses for specialized curing equipment, our direct manufacturing logistics pipeline ensures seamless door-to-door delivery through Cat Lai and Cai Mep ports within 7 to 12 days.
Serving Tier-1 & Tier-2 Suppliers in Bien Hoa
We provide localized technical qualification and OEM component support tailored to Dong Nai’s leading foreign invested enterprises (FDI):
- Amata Industrial Park: Semiconductor test carriers, wafer cleaning tanks, and slotted silica boats.
- Bien Hoa Industrial Zone 2: Heavy-duty transparent boiler sight glass, level gauges, and high-pressure chemical reaction tubes.
- Loteco Industrial Park: Deep UV optical viewports, sapphire sensor windows, and laser collimation cylinders.
- Agtex Long Binh & Giang Dien: High-temperature infrared emitter twin-tubes and ceramic-to-quartz custom couplings.
Supply Chain Diversification
Enterprises across Bien Hoa are optimizing operational margins by shifting away from hyper-inflated European and Japanese quartz vendors. Direct-from-source procurement from Donghai offers 35%–50% cost reductions with identical purity levels (SiO₂ ≥ 99.99%) and ISO-certified chemical benchmarks.
Cleanroom Automation in Vietnam
With massive automated cleanrooms expanding in Amata and nearby high-tech zones, precision laser-drilled fused silica plates and low-hydroxyl quartz rods (JGS3) are essential to prevent thermal drift in robotic optical sensors and laser alignment instruments.
Solar PV & Energy Equipment
Dong Nai’s renewable infrastructure growth requires robust CVD and PECVD furnace tubes. Our proprietary thermal annealing reduces internal stresses, allowing tubes to withstand cyclical thermal shocks up to 1300°C without devitrification or sagging.
Verified Engineering Precision
Material Physics & Comparative Optical Grades
Choosing between Synthetic Fused Silica (JGS1), Optical Fused Quartz (JGS2), and Infrared Transparent Fused Quartz (JGS3) dictates optical transmission, mechanical strength, and service lifetime.
100%
Inquiry Response Rate
Verified trade performance metric
≤ 2h
Engineering Turnaround
DFM drawing review & quotation
43%
Repeat-Order Rate
From global multi-year partners
$5M
Annual Export Capacity
US$2.5M – US$5M tier rating
| Property Parameter | JGS1 (Synthetic Fused Silica) | JGS2 (Optical Fused Quartz) | JGS3 (Infrared Fused Quartz) |
|---|---|---|---|
| Primary Transmission Spectrum | 185 nm – 2500 nm (Deep Ultraviolet) | 220 nm – 2500 nm (UV to Near-IR) | 260 nm – 3500 nm (Extended Infrared) |
| SiO₂ Purity Level | ≥ 99.999% (Ultra-pure synthetic) | ≥ 99.99% (Purified natural quartz) | ≥ 99.99% (Low-OH fused quartz) |
| Hydroxyl (OH⁻) Content | ≤ 1200 ppm (or low-OH synthetic) | ≤ 150 – 200 ppm | ≤ 5 – 10 ppm (Virtually water-free) |
| Continuous Max Temperature | 1100 °C | 1100 °C | 1150 °C |
| Short-Term Softening Point | 1683 °C (Thermal Shock Resilient) | 1683 °C | 1720 °C |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ /°C (0–1000 °C) | 5.5 × 10⁻⁷ /°C | 5.4 × 10⁻⁷ /°C |
| Primary Vietnamese Applications | UV Lithography, Laser Windows, Spectrophotometry | Furnace Observation, Flanged Tubes, Viewports | IR Heating Emitters, Thermal Pyrometry, Sensors |
Laser Micro-Machining
Our proprietary 5-axis CO₂ and picosecond laser cutting lines execute taper-free micro-hole drilling (down to 0.2 mm diameter), edge-chamfering, wafer slotting, and step-grooving with zero edge micro-fractures.
Hermetic Flame Welding
Certified master glassblowers execute complex manifold fabrication, twin-tube bridging, optical flange fusing, and ground joint welding under vacuum-clean argon purging, ensuring zero bubble entrainment.
Double-Sided Optical Polishing
Chemical-mechanical polishing (CMP) delivers surface roughness of Ra < 0.5 nm, scratch-dig tolerances to MIL-PRF-13830B (20/10), and flatness of λ/4 per 25 mm diameter for laser-grade viewports.
Zunex Factory Advantages
Rooted in Donghai: The Quartz Capital of China
Headquartered in Donghai County, Jiangsu Province—globally acknowledged as the hub for silica crystal processing—Zunex Quartz Products Co., Ltd. combines upstream raw material exclusivity with advanced CNC cold processing and artisanal hot forming.
Unlike trading agents who mark up prices without possessing technical expertise, our on-site engineering team verifies your engineering CAD drawings (DWG, DXF, STEP, PDF) directly against tool clearance, wall-thickness stress points, and thermal load constraints. We maintain a verified 100% response rate with quotation and DFM feedback delivered in two hours or less.
- Direct Sourcing: High-purity natural silica yields batch-to-batch consistency with bubble-free Class 0/1 clarity.
- Export Experience: Proven export record to over 45 countries, with deep familiarity in ASEAN customs procedures, Form E tariff exemptions, and hazardous-free declaration.
- Rigorous Q/C: Spectrophotometer transmission certification, optical laser surface interferometry, and polariscope stress mapping provided with every commercial batch.
Procurement Intelligence
Frequently Asked Questions by Bien Hoa Buyers
Practical answers addressing logistics, customs documentation, technical tolerances, and procurement minimums for industrial buyers across Dong Nai and Ho Chi Minh City.
What are the lead times and shipping routes from your Donghai factory to Bien Hoa?
For urgent prototypes, sample discs, or replacement tubes under 70 kg, we utilize express air freight (DHL, FedEx, SF International) arriving at Tan Son Nhat International Airport (SGN) in Ho Chi Minh City within 3 to 5 business days, followed by truck dispatch to your factory in Bien Hoa on the same day. For bulk shipments of furnace tubes or quartzware, ocean shipping from Lianyungang/Shanghai port to Cat Lai or Cai Mep port takes 7 to 10 days transit. Total standard production-to-delivery lead time is typically 14–20 days.
Can your company issue China-ASEAN Free Trade Certificate of Origin (Form E)?
Yes. Under the ACFTA (ASEAN-China Free Trade Area) agreement, we routinely provide official Form E Certificates of Origin alongside commercial invoices and packing lists. This allows eligible manufacturers and registered import companies in Vietnam to import quartz products under preferential tariff codes (HS Code: 7002.31, 7002.39, 7006.00) often reducing import tariffs down to 0%.
How do you guarantee that fragile quartz tubes and plates arrive intact without breakage?
We employ standardized multi-tier export packaging engineered specifically for brittle optical glassware. Each piece is individually sealed in lint-free protective film or PE foam, packed in high-density customized shock-absorbing EPE pearl cotton cavities, and housed within export-grade fumigated plywood wooden crates with structural internal corner brackets. Our global transit damage rate is verified under 0.1%. In the rare event of transit damage, we offer instant free-of-charge replacement with photo verification.
Can you manufacture quartz parts precisely to our custom mechanical CAD drawings?
Customization according to technical drawings is our core capability. We accept formats including AutoCAD (.dwg, .dxf), SolidWorks (.step, .stp), and high-resolution PDF engineering drawings. We routinely achieve outer diameter/length tolerances of ±0.05 mm, optical thickness tolerances down to ±0.01 mm, and hole-center positioning tolerances within ±0.02 mm. Our in-house tooling allows rapid prototyping without expensive mold setup fees.
How does your fused silica withstand continuous heating compared to borosilicate glass?
Standard borosilicate glass 3.3 softens near 820°C and cannot exceed continuous operational limits of 450°C to 500°C without risk of structural failure. In contrast, Zunex fused quartz glass features an annealing point of 1215°C, a continuous operational temperature rating of 1100°C, and can withstand peak spikes up to 1300°C. With an ultra-low thermal expansion coefficient (5.5 × 10⁻⁷ /°C), a red-hot quartz crucible can be plunged straight into ice water without cracking.
What payment terms and minimum order quantities (MOQ) do you offer?
We support flexible ordering arrangements for both R&D trials and production ramp-ups. Standard MOQs are 1 to 5 pieces for customized technical quartzware or tubes, and 10 to 50 pieces for standardized optical plates and rods. Payment can be settled via International Wire Transfer (T/T), Letter of Credit (L/C) at sight for commercial container orders, or Alibaba Trade Assurance for complete buyer capital protection.
Accelerate Your Fused Silica Sourcing for Bien Hoa
Send us your dimensional drawings, required purity grade (JGS1/JGS2/JGS3), or process operating temperature. Our engineering department will evaluate manufacturability and provide a factory-direct quotation within 2 hours.