What Are Quartz Glass Tubes? Material, Core Properties & Real‑World Applications-Sara
2026/08/08
Quartz glass tube, also known as fused silica tube, is a special hollow cylindrical component made of high‑purity silicon dioxide (SiO₂), with purity reaching 99.9% and above. Different from ordinary soda‑lime glass or borosilicate glass, it is manufactured by melting quartz raw materials at over 1700℃, delivering outstanding thermal stability, broad‑spectrum optical performance and superior chemical inertness. Thanks to these unique advantages, quartz glass tubes have become an indispensable core material for high‑end manufacturing, scientific laboratories and new‑energy industries worldwide
1. Outstanding High‑Temperature Resistance
Quartz glass features a softening point around 1730℃. It can work continuously at 1100℃, and withstand short‑term peak temperature up to 1300℃ without deformation or softening. Its ultra‑low thermal expansion coefficient (0.55 × 10⁻⁶/℃) grants excellent thermal‑shock resistance; it will not crack under drastic rapid heating‑cooling cycles, which cannot be achieved by common glass materials.
2. Broad‑Spectrum Optical Transmittance
High‑purity quartz tube transmits ultraviolet, visible light and near‑infrared light efficiently. It keeps high transmittance in deep‑UV band, making it irreplaceable for UV sterilization, photochemical reaction and spectral analysis equipment, while regular glass will block most ultraviolet rays.
3. Excellent Chemical Corrosion Resistance
Except for hydrofluoric acid, quartz glass hardly reacts with most acids, alkalis and organic solvents. Its acid‑resistant performance is far better than stainless steel and ceramics, suitable for long‑term service in harsh corrosive chemical environments. Meanwhile, ultra‑high material purity avoids impurity precipitation, preventing contamination of samples or semiconductor wafers during production process.
4. Reliable Electrical Insulation
Quartz glass maintains stable insulating property even under high‑temperature conditions, widely adopted for high‑temperature electric heating accessories and electronic‑industry insulating parts.
Main Industry Applications
- Semiconductor & Photovoltaic: Diffusion tubes, furnace liners and reaction chambers for wafer thermal processing. Strict purity control avoids wafer contamination and improves production yield.
- Laboratory & Chemical Industry: High‑temperature reaction tubes, tube‑furnace liners, sample holders for high‑temperature experiments, thermal analysis and corrosive‑medium testing.
- Optics & UV Disinfection: Envelope for UV‑C germicidal lamps, photochemical reactor sleeves, spectral instrument light‑pass components for water treatment and air sterilization systems.
- Industrial Heating & New Energy: Infrared heating lamp tubes, high‑temperature observation sight tubes, core parts for thermal‑treatment equipment.
Quartz Glass Tube VS Ordinary Glass Tube
Many customers confuse quartz tubes with common glass tubes. Ordinary borosilicate glass can only sustain long‑term temperature below 500℃, poor anti‑thermal‑shock performance, and blocks ultraviolet light. When high temperature, UV transmission or anti‑corrosion is required, quartz glass tube is the only reliable solution.
Custom Capability
Quartz glass tubes can be processed into transparent, frosted, opaque and capillary types. We support custom outer diameter, wall thickness, length, end‑face processing, cutting, drilling and secondary deep processing according to customer drawings and actual working‑condition requirements.
