Dedicated to High-Purity Quartz Solutions Since 2011
Donghai Kemzo Quartz Products Co., Ltd. is located in Donghai County, Lianyungang City, Jiangsu Province — widely recognized as the crystal capital of China due to its world-class natural silica reserves. Benefiting from regional supply chain strength and decades of cumulative thermal glass craft, we are a professional manufacturer and international exporter specialized in the research, precision fabrication, and custom distribution of high-performance fused quartz products.
Equipped with advanced multi-station melting furnaces, high-precision CNC cutting, mechanical edging, optical polishing facilities, and high-temperature flame annealing equipment, we service leading procurement entities across semiconductor fabrication, photovoltaic metallurgy, analytical instrumentation, UV curing, and laboratory sectors.
We firmly hold to our founding ethos: Client is the Center, Quality is the Key. Every custom order is manufactured strictly to customer drawings, meeting tight dimensional tolerances and stringent visual inspection criteria.
Essential Factory Facts
| Corporate Name | Donghai Kemzo Quartz Products Co., Ltd. |
|---|---|
| Established Year | 2011 (Over 14 Years Industry Track Record) |
| Operational Address | 7 North Huaya Road, Lianyungang, Jiangsu, China |
| Business Type | Manufacturer & Direct Exporter |
| Operational Plant | 1,000 – 3,000 m² Modern Processing Facility |
| Quality Certification | ISO 9001:2015 Registered Management System |
| Government Distinction | Jiangsu High Technology Enterprise |
| Export Ratio | 70% – 80% to North America, Europe & Asia |
Factory Facility & Production Lines
Our clean manufacturing workshop integrates raw material purification, tube thermal drawing, precision CNC cold machining, optical polishing, and stress-relieving annealing processes.
Engineering, OEM & R&D Capabilities
Our engineering team possesses deep expertise in high-temperature glass melting and cold mechanical fabrication. We work from customer CAD/PDF drawings or physical benchmark samples to produce complex configurations.
- Thermal Drawing & Flame Working: Controlled tube OD up to 450 mm, custom flared mouths, round bottoms, ground tapers, and precision branch welding.
- Cold Machining & CNC Milling: High-tolerance slotting, hole drilling, step milling, surface grinding, and edge beveling with tolerances down to ±0.02 mm.
- Optical Lapping & Polishing: Ultra-smooth surface finishes with roughness Ra < 0.5 nm and high transmittance across 200 nm – 2500 nm spectra.
Global Export Footprint
Our fused quartz products are exported to over 30 countries. We comply with all international transport standards, hazardous-free logistics, and customs documentation.
Quality Assurance & Inspection Framework
To ensure flawless field operation under extreme thermal and chemical environments, our QA laboratory executes standardized testing at each manufacturing stage.
Spectrometric Purity Verification
ICP-MS chemical trace element screening confirms purity from 99.9% up to 99.99% SiO₂, keeping Fe, Al, and alkali metal contamination negligible.
Polariscopic Residual Stress Check
Full polariscope examination ensures complete stress release after annealing, preventing catastrophic cracking during intense thermal cycling.
Optical Surface & Dimension Gauge
Laser micrometers verify outer diameters, inner diameters, and wall concentricity. Surface scratches and inclusions are monitored under clean room inspection.
Request a Factory Evaluation or Custom Quote
Have an engineering drawing, RFQ or technical question? Reach out to our technical sales engineers for professional guidance, sample evaluations, and factory direct quotations.
- Response time ≤ 1 hour
- Strict drawing confidentiality
- Export-standard seaworthy packaging