Quartz Tube
Fused silica, used as an industrial raw material, is essential for creating various refractory shapes such as crucibles, trays, shrouds, and rollers for high-temperature processes like steelmaking, investment casting, and glass manufacturing.
Refractory shapes made from fused silica boast excellent thermal shock resistance and are chemically inert to most elements and compounds, including virtually all acids, except hydrofluoric acid, which remains highly reactive even in low concentrations.
Translucent fused-silica tubes are commonly employed to encase electric elements in room heaters, industrial furnaces, and similar applications.
Quartz glassware is occasionally utilized in chemistry laboratories when standard borosilicate glass cannot endure high temperatures. More frequently, it serves as a fundamental component, such as a tube in a furnace or a flask directly exposed to heat.
Technical Details of Chempure® Quartz Tube
Mechanical
Density 2.20 x 103 Kg/m3
Young's Modulus 74 x 106 KN/m2
Rigidity Modulus 32 x 106 KN/m2
Compresive Strength 20 x 106 KN/m2
Tensile Strength 70 x 103 KN/m2
Shear Strength 70 x 103 KN/m2
Moh's Hardness 6
Electrical
Electrical Resistivity 2 x 1019 ohm cm at 20oC
2 x 106 ohm cm at 800oC
Dielectric Strength 10 KV/mm at 20oC
2.5 KV/mm at 500oC
Thermal
Strain Point 1385oK
Annealing Point 1455oK
Softening Point 1853oK
Coefficient of Expansion 0.52 x 10-6 per oC
Continuous Operating Temp. >1000oC
Optical
Useful Optical Range Synthetic 180 - 2000nm
Natural 275 - 2000nm
Refractive Index n D (589 nm) - 1.458
Chemical
SiO2 Content 99.995%
Total Metallic Impurities 10ppm (Typical)
Chemical Inertness
Fused quartz is chemically inert, with the exception of reacting to hydrofluoric acid and, at high temperatures, phosphoric acid. It reacts slowly with caustic alkalies at normal temperatures. Additionally, it does not react with water and steam under moderate temperatures and pressures. Detailed information, including transmission curves and levels of chemical impurities, is available upon request.
Applications of Quartz Tube
Scientific Research: Furnaces and Reactors, Thermogravimetric Analysis (TGA)
Semiconductor Industry: Diffusion and Oxidation Processes
Glass and Ceramics Industry: Melting and Sintering, Annealing
Lighting and Optical Devices: UV Lamps, Fiber Optics
Chemical Processing: Chemical Reactions, Catalyst Support
Aerospace and Defense: Thermal Protection
Medical and Laboratory Equipment: Sterilization, Spectroscopy
Energy Sector: Solar Cells, Fuel Cells
Features of Quartz Tube
High chemical purity
Resistance to high temperature
Coefficient of thermal expansion
High UV transmittance
Excellent electrical insulation qualities
High corrosion resistance
Rigidity modulus
Strain point