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
Company Profile
Southeast Quartz
Established in 2015, Lianyungang Southeast Quartz Products Co., Ltd. is located in Donghai County, Lianyungang City, Jiangsu Province—a globally recognized national base for the silicon material industry. As an advanced manufacturer integrating R&D, custom design, production, domestic sales, and international import & export trade, we leverage the region's superior high-purity quartz ore resources.
By focusing on the precision deep processing of quartz glass, Southeast Quartz has grown into a core supplier of high-performance quartz consumables. We proudly serve demanding global industries, including semiconductor wafer fabrication, photovoltaic (PV) solar cells, laboratory research, chemical engineering, and high-intensity lighting.
Precision Quartz Vacuum Components
Engineered to withstand extreme thermal, chemical, and physical environments in high-vacuum systems.
High-Purity Raw Materials
We source only high-purity fused silica, ensuring negligible metallic impurities (SiO2 ≥ 99.99%). This guarantees zero contamination in sensitive semiconductor thin-film deposition and thermal processes.
Thermal & Vacuum Stability
With an extremely low coefficient of thermal expansion, our custom quartz bell jars and vacuum chambers maintain structural integrity under thermal shocks up to 1200°C and deep vacuum configurations.
Flexible Customization
We provide full-process manufacturing from raw processing to intricate custom fabrications. We match your exact system specifications, flange profiles, and port configurations with dimensional precision.
Precision Engineered Quartz Products
Browse our selection of high-temperature, high-purity quartz consumables designed for industrial and laboratory systems.
Quartz Bell Jar
Designed for vacuum coating, plasma etching, and CVD processes. Outstanding thermal shock resistance and optical clarity.
Oversized Fused Quartz Tube
Perfect for large-diameter vertical furnaces, PV diffusion chambers, and heavy-duty industrial heating applications.
Quartz Furnace Tube
Tailored to laboratory and industrial tube furnaces. Offers excellent chemical purity and dimensional consistency.
Premium Quartz Boat
Precision-slotted carriers for semiconductor wafers and solar cells. Designed to resist deformation at elevated temperatures.
Fused Silica Quartz Plate
High-transmittance optical windows and heat-shielding plates. Resists corrosion and high thermal stress.
High Purity Quartz Rod
Solid fused silica rods for structural supports, fiber drawing, and semiconductor processing applications.
Plasma-Fused Quartz Ingots
High-density, bubble-free raw ingots for manufacturing custom optical lenses, prisms, and semiconductor parts.
Quartz Lamp Holder
Specialized heat-resistant holders for high-power UV, infrared, and halogen heating lamps in industrial ovens.
Why Custom Quartz Bell Jars are Critical in Vacuum Environments
In high-vacuum and ultra-high-vacuum (UHV) processes, the chamber material must exhibit near-zero outgassing, high structural integrity, and exceptional resistance to chemical degradation. Fused quartz stands out as the ultimate material for these environments.
Our custom quartz bell jars serve as high-purity process chambers where chemical vapor deposition (CVD), physical vapor deposition (PVD), and plasma etching take place. Because these processes run at high temperatures and involve reactive gases, standard glass or metals fail due to thermal cracking or chemical contamination.
- Thermal Resistance: Continuous operation up to 1100°C, and short-term exposure up to 1200°C.
- Chemical Inertness: Unaffected by most acids (excluding hydrofluoric), ensuring process purity.
- Vacuum Integrity: Each bell jar undergoes rigorous helium mass spectrometry leak testing.
- High Transmittance: Allows seamless visual inspection and optical monitoring of internal processes.
Advanced Quartz Processing & Manufacture
Witness our state-of-the-art processing techniques including hot-working, mechanical grinding, fire polishing, and welding.
Global Quartz Excellence
Our operational philosophy is built on three core pillars: Quality First, Technical Innovation, and Customer Success.
Customer Supreme
Adhering to the philosophy of "Quality First, Customer Supreme, Innovation-Driven, Integrity Management", we have built a customer-centric support model. We align our engineering teams with your R&D groups to design optimized quartz solutions.
Quality Control
All finished products undergo multiple strict tests before leaving the factory. This includes Helium Mass Spectrometry Leak Detection for vacuum integrity, high-temperature pressure tests, and chemical purity verification to ensure zero defects.
Customized Services
We recognize that no two systems are alike. We provide flexible customization, adjusting sizes, flange types, wall thicknesses, and gas inlet configurations to match your specific equipment parameters and process requirements.
Our Production Facility & Equipment
A tour inside Southeast Quartz: standardized cleanrooms, modern CNC machining, and automated quartz blowing equipment.
Industries Served & Applications
Our high-purity quartz consumables are engineered to meet the demanding standards of global high-tech industries.
Semiconductor Manufacturing
Used in CVD, diffusion, and oxidation chambers. Our custom bell jars, wafer boats, and gas inlet tubes ensure a clean, contamination-free environment for wafer processing.
Learn More →Solar & Photovoltaic (PV)
Critical in silicon ingot growth and wafer diffusion processes. Our oversized quartz tubes and high-temp quartz boats withstand continuous thermal cycles in solar cell manufacturing.
Learn More →Laboratory & Research
Ideal for chemical analysis, distillation, and high-temperature reactions. Our beakers, flasks, and digestion tubes offer chemical inertness and extreme thermal shock resistance.
Learn More →
Quality • Service • Global Presence
With reliable product quality, efficient delivery, and attentive after-sales service, Lianyungang Southeast Quartz Products Co., Ltd. has established a strong global presence. Our products cover all major provinces and cities in China and are exported to Europe, North America, Southeast Asia, and the Middle East.
In the future, we will continue to invest in technological innovation, refining our raw material purification and high-precision CNC machining capabilities. We strive to provide global customers with the highest quality quartz product solutions, supporting high-end manufacturing and scientific research.
Certified Quality & Compliance
Our facility operates under rigorous international quality standards to ensure our products meet strict regulatory codes.
Quality Certificate
REACH Certificate
ROHS Certificate
SGS Certificate
Test Report
Frequently Asked Questions & Technical Specs
Technical insights about custom quartz bell jars and vacuum component engineering.
Q1: What raw material grades do you use for quartz bell jars?
We use high-purity fused silica with SiO2 content exceeding 99.99%. This grade features extremely low hydroxyl (OH) content and negligible trace metal concentrations (Fe, Al, Ca, Mg, Ti), making it ideal for semiconductor and high-vacuum processing without risks of contamination.
Q2: What is the maximum thermal limit of your quartz chambers?
Our quartz components can operate continuously at temperatures up to 1100°C. For short-term processes, they can withstand thermal spikes up to 1200°C. Fused quartz also has an incredibly low coefficient of thermal expansion, preventing cracking during rapid thermal cycles.
Q3: How do you verify vacuum and leak-free performance?
All customized quartz vacuum bell jars undergo rigorous Helium Mass Spectrometry Leak Detection. This test identifies micro-cracks or weld porosity, ensuring the chamber maintains pressure levels essential for thin-film deposition and plasma processing.
Q4: Can you customize quartz flanges and ports?
Yes. We specialize in custom fabrications. We can weld customized ground flanges, KF/ISO flanges, gas inlets, and sensor ports directly onto the bell jar body. We work from technical drawings (CAD/STEP) to ensure precise alignment with your vacuum systems.
Need Custom Quartz Vacuum Components?
Contact our engineering team today to review your drawings, discuss material specifications, or receive a fast quote for custom quartz bell jars.