Transparent Quartz tube

The high purity quartz products, used our own mine, high quality nature crystal as the raw material, go thru advanced technic. At UV wave band 185nm, the wavelength through average about 70%, it is the best material for ozone-free sterilize lamp or sleeve quartz glass tubing. At UV wave band 253.7nm, the wavelength through rate average > 85%, be propitious to Ozone sterilize lamp or sleeve quartz glass tubing.Transparent Quartz tubes widely apply to Semiconductor, Lighting, and Electric heating Industrial field. Transparent Quartz tube physical Properties:GlassABCDensity @ 20 (±05g/CM2) 2.22.212.21Thermal Expansion (cm/cmoC) 5.4 x 10 -7 5.8 x 10 -7 6.6 x 10 -7Thermal Conductivity (25 oC)0.00323 Cal / cm - sec - oCYoungs Modulus (x 103 kg/ mm2) 7.27.57.0Softening Point (oC) 173016801660Annealing Point (oC) 121512051165Strain Point (oC) 112011001060Resistivity (CM) @ 350 o7 x 109 2.5 x 1010 5 x 1010 Dielectrical Constant (@ 1Mhz) 3.70 5.76 6.02 Typical Trance Element Compositions (PPM by weight): Type Al Fe Ca Mg Ti Mn B K Na Li OH A 15 0.21 0.5 <0.1 0.8 <0.05 0.08 0.6 0.8 0.7 <120 B 15 0.21 0.5 <0.1 0.8 <0.05 0.08 0.6 0.8 0.7 <10 C 15 0.21 0.5 <0.1 0.8 <0.05 0.08 0.6 0.8 0.7 <5 Standard Size & Tolerance (Tube) : Size(mm) OD(mm) W.t.(mm) Length(mm) Siding Max Bow Max Oval Max <15 ±0.15 ±0.10 ±1.0 0.1 0.15 2 15-30 ±0.25 ±0.15 ±1.0 0.13 0.25 2 30-50 ±0.50 ±0.15 ±1.0 0.15 0.5 2 50-70 ±1.50 ±0.20 ±1.0 0.2 0.7 3 70-100 ±2.00 ±0.25 ±1.0 0.2 1 4