quartz boats

Description :

Quartz Boats Fused silica, utilized as an industrial raw material, is fashioned into 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 exhibit excellent thermal shock resistance and are chemically inert to most elements and compounds, including virtually all acids, except hydrofluoric acid, which is highly reactive even at low concentrations. Translucent fused-silica tubes are commonly used to encase electric elements in room heaters, industrial furnaces, and similar applications. Quartz glassware is occasionally used in chemistry laboratories when standard borosilicate glass cannot withstand high temperatures. It is more commonly found as basic components, such as tubes in furnaces or flasks, directly exposed to heat. Technical Details of Chempure® Boat 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 Boat Semiconductor Manufacturing Chemical Vapor Deposition (CVD) Thermal Processing Laboratory Applications Photovoltaic Industry Research and development laboratory applications Crystal Growth Fiber Optics Features of Boat Unmatched chemical purity Low Thermal Expansion High purity of materials Elevated annealing point Good Electrical Insulation Reduced thermal expansion coefficient Excellent Transparency Effective optical transmission capabilities