Enterprise Profile & Manufacturing Heritage
Donghai Kemzo Quartz Products Co., Ltd. is located in the scenic coastal industrial hub of Lianyungang, Jiangsu, China. Operating in Donghai County — widely recognized as the crystal capital of China — our facility benefits from exceptional raw material proximity, abundant high-purity natural silica deposits, and decades of regional glass-crafting heritage.
Since our inception in 2011, we have integrated research, design, precision machining, and export distribution. Our manufacturing lines encompass high-purity quartz sand, clear fused quartz glass tubes, ozone-free and oxidized tubes, semiconductor diffusion and process tubes, ground-joint laboratory glassware, optical quartz plates, crucibles, quartz boats, rods, light guides, and specialized quartz apparatus for chemical, solar photovoltaic, and electronic industries.
Honored as a Jiangsu High Technology Enterprise and certified under the ISO 9001 Quality Management System, Donghai Kemzo Quartz Products Co., Ltd. delivers high-precision OEM and ODM services with verified dimensional repeatability and zero-defect quality targets.
- Legal Corporate Entity
- Donghai Kemzo Quartz Products Co., Ltd.
- Year Established
- 2011 (14 Years Expertise)
- Operating Facility
- 7 North Huaya Road, Lianyungang, Jiangsu, China
- Quality Certification
- ISO 9001:2015 Verified
- Workforce Structure
- 11 – 50 Technical Specialists
- Export Share
- Over 70% Worldwide Export
Comprehensive Technical Capabilities
Our multi-tier manufacturing workshop supports everything from high-volume standardized tube drawing to intricate cold-working and hot-forming to technical drawings.
Raw Material Refining
Direct access to Donghai quartz deposits allows rigorous selection of crystal feedstock. Chemical purification ensures low transition metal ions (Fe, Cu, Ni < 1 ppm), providing structural integrity and minimal thermal devitrification at temperatures up to 1450 °C.
Precision Cold Machining
Equipped with specialized CNC diamond profiling machinery, precision slicing cutters, double-sided optical grinding tables, and fine polishing units. We achieve plate thickness uniformity within ±0.05 mm, optical parallelism, and smooth surface finishes down to Ra < 0.2 μm.
Thermal Hot Working & Annealing
Our experienced glass technicians execute complex oxyhydrogen flame joining, taper blowing, end-capping, flanging, and ground-joint fusion. Programmed electric annealing furnaces relieve residual stresses to prevent micro-cracks under harsh thermal shock conditions.
Rigorous Quality Assurance
Every fabrication batch undergoes strict multi-step verification including polariscope strain measurement, spectrophotometer spectral transmission checks, dimensional laser micrometry, and rigorous bubble/airline grading according to industry criteria.
Export Packaging Engineering
Fragile quartz glass necessitates specialized export shipping protocols. We implement vacuum heat-sealed wrapping, pearl wool shock-absorbing lining, individual cellular partitions, and fumigation-free reinforced plywood cases to guarantee zero transit damage.
OEM / ODM Engineering Support
From university research laboratories to international semiconductor equipment contractors, we review CAD/PDF drawings, recommend cost-effective quartz grades, assess tolerance feasibility, and issue rapid engineering feedback within one business hour.
Global Trade Footprint
Over 70% of Donghai Kemzo Quartz Products Co., Ltd.'s annual manufacturing output is exported to international markets across North America, Eastern Asia, Europe, and Oceania. We maintain long-term supply relationships with engineering procurement specialists, scientific labs, and industrial equipment builders.
With verified compliance, multi-currency settlement capabilities (USD, EUR, AUD, HKD, CNY), and flexible Incoterms (FOB, CFR, CIF, EXW, DDU, DAF, Door-to-Door Express), we provide seamless cross-border supply chain operations.
Need Tailored Fused Quartz Components or Full Product Specifications?
Request our comprehensive product catalog, material grade datasheets, and mechanical dimension guidelines. Our engineering department evaluates drawings and project inquiries with rapid turnarounds.