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Our precision-engineered quartz tubes are the critical consumable component in Czochralski and float-zone silicon crystal growth furnaces used across the global photovoltaic industry.
Lianyungang Southeast Quartz Products Co., Ltd., established in 2015, is located in Donghai County, Lianyungang City, Jiangsu Province — a national base for 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 industries with mature production technology, strict quality control system and complete customized services.
The company has standardized production workshops, advanced quartz processing equipment and a professional R&D team, with full-process production capacity from quartz raw material processing to finished product manufacturing. It can produce a full range of quartz products, including high-purity fused quartz tubes, quartz furnace tubes, quartz bell jars, quartz boats, quartz lamp holders, quartz crucibles, quartz instruments (beakers, condensers, distillers, etc.), and tri-acid purification equipment. All products are made of high-purity fused quartz raw materials, featuring excellent high-temperature resistance (up to 1200℃), thermal shock resistance, corrosion resistance, high light transmittance and good electrical insulation performance, which can meet the demanding working conditions such as vacuum environment, high-temperature sintering, atmosphere control and precision experiments.
The global photovoltaic industry is experiencing unprecedented growth, driving surging demand for high-performance quartz tube components used throughout the silicon crystal growth supply chain.
As solar energy installations accelerate worldwide, the demand for ultra-pure quartz tubes used in Czochralski crystal pullers, diffusion furnaces, and PECVD systems has grown by over 35% in the past three years. Quartz tube manufacturers are now critical enablers of the clean energy transition.
In monocrystalline silicon ingot pulling (Czochralski method), fused quartz tubes serve as the primary containment and thermal management component in crystal growth furnaces. The purity and dimensional precision of the quartz tube directly determines the quality of the silicon crystal and the efficiency of the final solar cell. With the global shift toward high-efficiency PERC, TOPCon, and HJT cells, the technical requirements for quartz tubes have never been more demanding.
The global fused quartz market is projected to surpass USD 1.8 billion by 2028, with photovoltaic applications accounting for over 40% of total consumption. China, the world's largest solar panel manufacturer, is also the dominant consumer of quartz tube products. Manufacturers in Donghai County, Jiangsu Province — sitting atop the world's highest-grade quartz ore reserves — have emerged as the most cost-competitive and technically advanced suppliers globally.
Modern photovoltaic silicon crystal growth demands quartz tubes with SiO₂ purity exceeding 99.99%, metallic impurity levels below 1 ppm, and dimensional tolerances within ±0.1mm. Thermal shock resistance, bubble-free transparency, and consistent wall thickness are equally critical. Leading manufacturers now employ helium mass spectrometry leak detection and automated optical inspection to meet these stringent process requirements.
The quartz tube manufacturing sector is undergoing rapid transformation driven by photovoltaic industry evolution, digitalization, and sustainability demands.
As silicon ingot diameters scale from 210mm to 230mm+ (M10/G12 wafer formats), crystal growth furnaces require oversized quartz tubes with inner diameters exceeding 500mm. This trend is pushing manufacturers to develop new forming and annealing technologies capable of producing defect-free large-format quartz components at scale.
Leading quartz tube manufacturers are integrating CNC grinding, automated flame polishing, and AI-powered dimensional inspection systems into their production lines. This shift toward smart manufacturing reduces human error, improves consistency, and enables rapid response to customized orders — critical for photovoltaic equipment OEMs requiring tight dimensional tolerances.
With quartz being a finite high-grade mineral resource, manufacturers are investing in quartz recycling and regeneration programs. Spent quartz tubes from photovoltaic production lines are being reclaimed, purified, and reprocessed into secondary quartz products, reducing raw material consumption and aligning with the broader ESG commitments of solar panel manufacturers.
Post-pandemic supply chain disruptions accelerated the trend of photovoltaic manufacturers seeking regional quartz tube suppliers. Chinese manufacturers with established export infrastructure, multilingual technical support, and ISO-certified quality systems are well-positioned to serve as primary quartz suppliers for PV production facilities in Southeast Asia, the Middle East, and Europe.
Our quartz tubes are engineered for precision performance across every critical stage of photovoltaic silicon production and related high-tech industries.
In Czochralski (CZ) silicon crystal growth — the dominant method for producing monocrystalline silicon wafers for solar cells — quartz tubes form the inner liner of the crystal puller. They must withstand continuous operation at 1400–1500°C in a controlled argon atmosphere, maintain dimensional stability under thermal cycling, and exhibit zero contamination of the molten silicon charge. Our CZ furnace quartz tubes feature wall thickness uniformity within ±0.3mm and surface cleanliness meeting SEMI standards.
After silicon wafers are sliced from the ingot, they undergo phosphorus diffusion and thermal oxidation in quartz tube furnaces to form the p-n junction essential for photovoltaic energy conversion. These process tubes must maintain extremely high purity (metallic contamination <1 ppb) to prevent carrier lifetime degradation in the silicon wafer. Our diffusion furnace quartz tubes are manufactured from synthetic fused silica with OH content optimized for specific process temperature windows.
Plasma-enhanced chemical vapor deposition (PECVD) and atomic layer deposition (ALD) are used to deposit anti-reflection coatings and passivation layers on solar cells. Quartz tubes and flanges serve as process chamber liners in these systems, providing chemical resistance to reactive gases (SiH₄, NH₃, TMA) while maintaining dimensional precision for vacuum sealing. Our quartz components for PECVD applications feature fire-polished surfaces with Ra < 0.4μm.
Research institutions and photovoltaic technology developers use quartz tubes in bench-scale crystal growth experiments, materials characterization, and process development. Custom-sized quartz tubes, quartz boats, and quartz reaction vessels enable precise replication of production conditions at laboratory scale, accelerating the development of next-generation solar cell technologies including perovskite-silicon tandems and kerfless silicon wafer production.
From raw quartz ore selection to finished product delivery, every step of our manufacturing process is engineered for maximum purity, precision, and performance.
Raw Material Selection & Purity Testing
›High-Temp Fusing & Forming
›CNC Precision Machining
›Flame Polishing & Annealing
›Helium Leak Detection & QC
›Cleanroom Packaging & Export
State-of-the-art manufacturing facilities in Donghai County — the world's premier quartz production base — equipped with advanced quartz processing machinery and a dedicated R&D team.
Adhering to the philosophy of "Quality First, Customer Supreme, Innovation-Driven, Integrity Management", the company has established a complete quality inspection system. All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test and purity test before leaving the factory to ensure stable performance, no impurities and no leakage.
Meanwhile, the company provides flexible customized services, and can customize product sizes, structures and specifications according to customers' equipment parameters and process requirements, quickly responding to personalized orders.
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 also are exported to many countries and regions in Europe, America, Southeast Asia, the Middle East, etc., winning wide recognition and trust from customers at home and abroad. In the future, the company 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 the high-quality development of high-end manufacturing and scientific research fields.
Every quartz tube undergoes helium leak testing to ensure zero leakage under vacuum and high-pressure process conditions.
We manufacture quartz tubes to exact customer specifications — inner diameter, outer diameter, wall thickness, length, and end configurations.
Established export infrastructure with experience shipping to 50+ countries, including full compliance with international trade regulations and packaging standards.
From raw quartz ore sourcing to finished product delivery — complete vertical integration ensures quality control at every stage of production.
Beyond quartz tubes for silicon crystal growth, we offer a comprehensive portfolio of high-purity fused quartz components for every stage of photovoltaic manufacturing and related industries.
PV Crystal Growth
Oversized Fused Quartz Tube for High Temp Applications
Diffusion Furnace
Custom Size Quartz Furnace Tube for Laboratory & Industrial Use
Insulation Component
Custom Transparent Quartz Glass Ring High Temperature Resistant Insulation Ring
Process Equipment
Fused Silica Quartz Plate – Heat Resistant
Custom Solutions
Customized Quartz Products
Semiconductor & PV
High Purity Quartz Rod / Fused Silica Rod for Semiconductor & Laboratory
Industrial Lighting
Heat Resistant Quartz Lamp Holder for Industrial Use
Wafer Processing
Premium Quartz Boat for High Temperature Processes
Whether you require standard quartz furnace tubes, oversized crystal growth components, or fully custom quartz solutions for your photovoltaic production line — our engineering team is ready to deliver. Contact us today for technical consultation, samples, and competitive pricing.
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