Quartz Furnace Tube
Oversized Quartz Tube
Quartz Boat
Quartz Plate
Quartz Lamp Holder
Quartz Rod
Quartz Ring
Customized Quartz Products
Plasma-Fused Quartz Ingots
Quartz Irregular Shaped Sheets
Quartz Crystal Singing Pyramid
Half-white Coated Short-wave Infrared Quartz Heating Lamp
High-Performance Fused Quartz Solutions & Custom Ring Machining
As a premier custom quartz rings supplier, Southeast Quartz leverages raw natural crystalline silicon from Donghai County to manufacture precision quartz insulation rings, etching rings, furnace collars, and bespoke fused quartz glass components. Our components deliver exceptional thermal shock resistance, near-zero thermal expansion, optical transparency, and chemical inertness under extreme plasma and vacuum environments.
High-Temperature Thermal Stability
With a softening point reaching 1730°C and continuous operation up to 1200°C (short-term resistance to 1450°C), our custom quartz rings and furnace products resist devitrification, sagging, and thermal shock under rapid heating-cooling cycles.
Superior Chemical & Acid Resistance
Except for hydrofluoric acid and hot phosphoric acid, fused quartz is chemically inert to all industrial acids, halogens, and organic solvents, making our quartz rings ideal for corrosive tri-acid distillation and semiconductor wafer etching chambers.
Micro-Toleranced CNC Customization
Equipped with 5-axis CNC grinding centers, laser wafer scribing, ultrasonic coring, and optical-grade flame polishing, we fabricate bespoke ring diameters, step flanges, beveled sealing grooves, and micro-holed precision rings to customer CAD drawings.
Featured Precision Fused Quartz Components & Rings
Browse our comprehensive selection of high-purity quartz products designed for semiconductor fabrication, epitaxial growth, optical lasers, and laboratory thermal synthesis.
Custom Transparent Quartz Glass Ring High Temperature Resistant Insulation Ring
Ultra-clear fused silica insulation rings designed for wafer chuck insulators, vacuum flange seals, and high-frequency heating coils.
View Ring Details
Introduction to Plasma-Fused Quartz Ingots
Bubble-free, high-homogeneity synthetic and natural quartz ingots ideal for subsequent ring slicing, optical blanking, and semiconductor fabrication.
View Ingot Specs
Oversized Fused Quartz Tube for High Temp Applications
Large-bore fused quartz tubing up to Ø600mm for horizontal diffusion furnaces, PV silicon ingot casting, and large-scale thermal processing.
Explore Large Tubes
Custom Size Quartz Furnace Tube for Laboratory & Industrial Use
Precision-ground tube ends with optional welded flange rings, gas inlet nozzles, and vacuum joints for CVD and annealing furnaces.
Custom Furnace Tube
Quartz Bell Jar with Excellent Thermal Stability
Heavy-wall fused quartz bell jars for semiconductor plasma deposition, silicon wafer annealing, and vacuum chamber shielding.
View Bell Jar
Premium Quartz Boat for High Temperature Processes
Slot-milled wafer carriers and ladder boats engineered for precise silicon wafer loading in high-temperature diffusion furnaces.
Wafer Boat Catalog
High Purity Quartz Digestion Tube for Laboratory
Heavy-duty acid digestion and analytical lab tubes engineered for trace-element analysis without heavy metal contamination.
View Lab Quartz
Heat Resistant Quartz Lamp Holder for Industrial Use
Precision thermal isolators and lamp bases for UV curing systems, infrared heating emitters, and halogen stages.
View Lamp Holders
Fused Silica Quartz Plate – Heat Resistant
Double-side polished optical windows and high-temp observation sight glasses with over 92% light transmission across UV-Vis-NIR.
View Quartz Plates
High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory
Dense, bubble-free solid fused quartz rods for fiber optic drawing handles, semiconductor push-rods, and lighting electrodes.
View Quartz Rods
Customized Quartz Products & Scientific Glassware
Tailored tri-acid purification equipment, distillation columns, quartz beakers, condensers, and complex welded quartz assemblies.
Custom AssembliesWhy Choose Precision Fused Quartz Rings?
Fused quartz is an amorphous silica glass synthesized by melting high-purity natural silica sand in an electric or oxy-hydrogen arc. The resulting material exhibits unparalleled structural stability, minimal thermal expansion, and unmatched electrical resistance even at elevated temperatures exceeding 1000°C.
Ultra-Low Thermal Expansion
With an extremely low coefficient of thermal expansion (5.5 × 10⁻⁷ /°C), our custom quartz rings withstand rapid temperature transitions from 1100°C down to 20°C water quench without micro-cracking.
Superior Dielectric & Insulating Properties
Quartz maintains high electrical resistivity and extremely low dielectric loss even at gigahertz microwave frequencies and high furnace sintering temperatures.
Plasma & Plasma-Etch Durability
Engineered with zero surface micro-flaws, our semiconductor-grade quartz rings resist aggressive fluorinated plasma (CF4, NF3) etching during wafer deposition cycles.
| Physical / Chemical Property | Standard Metric Value |
|---|---|
| SiO2 Chemical Purity | ≥ 99.99% - 99.999% |
| Density | 2.20 g/cm³ |
| Hardness (Mohs / Knoop) | 7.0 Mohs / 600 kg/mm² |
| Coefficient of Thermal Expansion (CTE) | 5.5 × 10⁻⁷ cm/cm·°C (20°C - 320°C) |
| Softening Point | 1730°C (3146°F) |
| Annealing Point | 1180°C (2156°F) |
| Continuous Service Temperature | 1150°C - 1200°C |
| Dielectric Constant (1 MHz) | 3.75 |
| Refractive Index (nD 589.3 nm) | 1.4585 |
| Machining Tolerances | Up to ±0.005 mm (CNC Ground) |
Company Profile: Southeast Quartz
World-class manufacturing capability based in Donghai County—China's silicon material capital.
Lianyungang Southeast Quartz Products Co., Ltd.
Lianyungang Southeast Quartz Products Co., Ltd., established in 2015, is located in Donghai County, Lianyungang City, Jiangsu Province—a national base for the silicon material industry. As a professional manufacturer integrating R&D, design, production, sales, and import & export trade, the company relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier of quartz consumables for photovoltaic, semiconductor, laboratory, chemical, lighting, and other high-tech industries with mature production technology, a strict quality control system, and complete customized services.
The company operates standardized production workshops, advanced CNC quartz processing equipment, and an experienced R&D engineering team, providing full-process production capacity from quartz raw material processing to finished component manufacturing. Our product portfolio spans high-purity fused quartz tubes, quartz furnace tubes, bell jars, quartz boats, lamp holders, crucibles, lab instruments (beakers, condensers, distillers), and tri-acid purification systems.
Strict Three-Pillar Quality Control Architecture
Adhering to our core philosophy: "Quality First, Customer Supreme, Innovation-Driven, Integrity Management".
Customer Supreme
We place client operational goals at the core of our engineering. From initial drawing validation and tolerance analysis to rapid prototyping and volume production, we ensure complete alignment with customer system parameters.
Rigorous Quality Control
All products undergo comprehensive testing, including helium mass spectrometry leak detection, hydrostatic pressure resistance testing, ICP-MS trace purity analysis, and optical polariscopic strain verification prior to dispatch.
Customized Services
We offer flexible OEM and ODM solutions, customizing quartz ring dimensions, outer/inner diameters, beveled edge chamfers, and surface roughness (ground vs. fire-polished) to meet harsh vacuum and plasma etching demands.
International Quality Certifications & Test Reports
Our manufacturing processes comply with strict global quality and environmental management benchmarks.
Manufacture: Product Processing & Machine Workshop
A look inside our state-of-the-art CNC machining centers, quartz glassblowing benches, and thermal annealing facilities.
Precision Quartz Processing Display
Factory & Workshop Environment
Comprehensive Factory Images
Applications: Powering Advanced Semiconductor, Solar & Science
Explore how custom fused quartz rings and thermal silica components integrate into mission-critical global industries.
Semiconductor & Microelectronics
Used in dry etching chamber focus rings, dielectric isolation spacers, wafer handling quartz boats, and RTP process rings without metallic ion contamination.
Explore Insulation Rings →Photovoltaic & Solar Energy
Diffusion furnace tubes, oversized quartz reaction chambers, and high-purity quartz carrier boats for mono/poly silicon ingot wafer manufacturing.
Explore Solar Quartz Boats →Optical & Laser Technologies
UV fused silica windows, beam splitter rings, high-damage-threshold sight glasses, and laser cavity components offering >92% broad-spectrum transmission.
Explore Quartz Plate Uses →Chemical & Tri-Acid Purification
Sub-boiling high-purity acid purification stills, distillation towers, chlorine/hydrogen burners, and chemical synthesis reaction vessels.
Explore Burners & Tubes →Global Presence, Quality Assurance & Engineering Innovation
With reliable product quality, efficient delivery capacity, and thoughtful after-sales service, the products of Lianyungang Southeast Quartz Products Co., Ltd. not only cover all provinces and cities in China but are also exported to Europe, North America, Southeast Asia, and the Middle East.
Quality • Service • Global Presence
We continuously optimize crystal melting and cold-machining processing methods, investing heavily in automated CNC diamond cutting tools and cleanroom packaging to maintain our competitive edge as an elite global quartz partner.
Innovation and Scientific Research
In the future, Southeast Quartz will continue to deeply cultivate the field of quartz products, continuously improve technological innovation and production technology levels, and strive to provide global customers with higher-quality and more professional quartz product solutions, contributing to high-end manufacturing and scientific research.
Our 4-Step Custom Ring Fabrication Workflow
Send us CAD/STEP drawings, inner/outer diameters, thickness, and working temperature criteria.
Selection of optical grade JGS1, JGS2, or high-purity natural fused silica raw material.
Precision profiling, edge beveling, ultrasonic drilling, and stress-relieving thermal annealing.
Dimensional tolerance verification, multi-layer vacuum shockproof export packaging.