The long-term continuous use temperature of quartz tubes is usually recommended to be controlled within 1100 ℃, and the short-term ultimate temperature resistance can reach 1450 ℃. If operated at high temperatures exceeding 1100 ℃ for a long time, quartz tubes will indeed face softening deformation and irreversible crystallization risks. Therefore, in extreme high-temperature processes, it is necessary to strictly control the temperature threshold and the rate of temperature rise and fall to ensure the safety, stability, and service life of the equipment.

As a professional quartz product manufacturer, Luverre Quartz is committed to providing high-purity and high-precision customized quartz tube solutions for global customers. We provide one-stop services from material selection to deep processing to address issues such as material failure, purity contamination, and frequent shutdowns encountered by users under harsh working conditions. We ensure excellent performance in high temperature resistance, thermal shock resistance, and corrosion resistance of our products, guaranteeing smooth and unobstructed core process flow for you.

Analysis of Temperature Resistance and Softening Mechanism of Quartz Tube

The quartz tube (fused silica) is famous for its excellent thermal stability and extremely low expansion coefficient, but understanding its physical limit is a prerequisite for safe application:

Continuous operating temperature: Under normal atmospheric conditions, quartz tubes can operate safely for a long time at 1100 ℃ while maintaining structural integrity.

Short term extreme temperature: The short-term tolerance temperature can reach 1450 ℃, but staying at this temperature for a long time will accelerate material aging.

Softening and deformation challenges: The softening point of quartz is approximately 1730 ℃. When the temperature exceeds 1100 ℃ or even approaches 1200 ℃, its viscosity will sharply decrease. At this time, if subjected to its own gravity or the weight of the sample boat, it is prone to softening and deformation phenomena such as sagging and bulging.

Vacuum environment limitation: Under vacuum conditions, external atmospheric pressure can compress the tube wall. It is recommended to lower the maximum operating temperature to within 1000 ℃ to prevent structural collapse.

Advantages and Full Specification Customization Services

To address various challenges in complex industrial environments, our quartz products possess the following core values:

Ultra high purity guarantee: Using high-quality raw materials, the purity of SiO2 is over 99.995%, with extremely low metal impurities, avoiding becoming a source of pollution at high temperatures and meeting the strict requirements of semiconductor and optical grades.

Excellent thermal shock resistance: Its extremely low coefficient of thermal expansion enables it to withstand severe temperature fluctuations (such as direct immersion in water at 1100 ℃ without explosion), significantly reducing the risk of rupture caused by thermal stress.

Extreme chemical inertness: Except for hydrofluoric acid and hot phosphoric acid, it hardly reacts with any acid or alkali, and its acid resistance is 30 times that of ceramics and 150 times that of stainless steel.

Flexible customized processing: We provide comprehensive specification customization, with outer diameters ranging from a few millimeters to several hundred millimeters, and wall thickness and length can be adjusted as needed. Support deep processing services such as cutting, burning, flange docking, sanding, and irregular hot bending, perfectly meeting the needs of non-standard equipment.

Typical application scenarios and customer cases

Our products are widely used in fields such as semiconductor diffusion, photovoltaic ingots, fiber manufacturing, environmental monitoring, and special light sources, effectively solving many industry problems.

Customer application case: Process upgrade of a certain photovoltaic cell manufacturer

The conventional quartz furnace tube originally used by the enterprise frequently experienced sagging deformation in the middle of the tube body and severe crystallization and whitening of the inner wall during long-term phosphorus diffusion processes above 1150 ℃. This not only leads to uneven distribution of the thermal field inside the furnace, causing significant fluctuations in the conversion efficiency of battery cells, but also forces the production line to shut down and replace furnace tubes every month, resulting in a fragmentation rate as high as 3% at one point, causing huge production capacity losses.

After introducing our customized quartz tube, this dilemma has been fundamentally improved. We have provided a low hydroxyl quartz tube treated with a special high-temperature annealing process, which completely eliminates residual stress inside the tube; At the same time, plasma polishing technology has improved the smoothness of the inner wall and significantly reduced the nucleation points of crystallization. After six months of continuous operation verification, the sag of the new furnace tube at 1180 ℃ has been strictly controlled within 0.5mm, and the maintenance cycle has been successfully extended from the original one month to over six months. The battery fragment rate has been reduced to below 0.8%, saving customers over one million yuan in comprehensive costs annually.

No matter what extreme high temperature or corrosion conditions you face, we can provide you with the most suitable quartz material and size solution. Welcome to contact us anytime for exclusive quartz product customization quotes and technical guidance!

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.