Ozone free quartz tube
With colorless surface and a slightly purple cross- section, the ozone free quartz tube can block the ultraviolet rays of less than 220nm in the spectrum, and the ultraviolet transmittance at 253.7 nm is more than 87%. Ultraviolet radiation at this wavelength has strong bactericidal power..
Mainly used: ozone free UV germicidal light, electric light, medical equipment and all kinds of sterilization equipment .
Chemical Composition
unit:ppm
K+Na |
Ca |
Fe |
Al |
Mg |
Ti |
Ba |
Li |
Cu |
＜10 | ＜3.0 | ＜1.5 | ＜20 | ＜1.0 | ＜3.0 | ＜0.2 | ＜1.0 | ＜0.5 |
Physical Properties
Density（g/cc) | 2.2 |
Coefficient of thermal expansion（cm/cm℃） | 0.56 |
Softening point(℃) | 1630 |
Annealing point(℃) | 1180 |
Transformation point (℃) | 1070 |
Youngs modulus(Pa) | 7.3×105 |
Dimensional tolerances
OD range
|
Wall |
Siding |
Ovality |
Bow
|
12.0±0.10mm | 1.0±0.10mm | 10% | 1.5% | 2.5% |
15.0±0.12mm | 1.0±0.12mm | 15% | 1.5% | 2.5% |
17.0±0.15mm | 1.0±0.15mm | 15% | 1.5% | 2.5% |
18.5±0.15mm | 1.0±0.15mm | 15% | 1.5% | 2.5% |
19.0±0.2mm | 1.0±0.15mm | 15% | 1.5% | 2.5% |
25.0±0.3mm | 1.0±0.02mm | 15% | 1.5% | 2.5% |
Light transmittance at 1.0nm
Nm | 185 | <220 | 230-380 | 550 | 590 | 780 |
% | 0 | 0 | ≥85 | ≥90 | ≥92 | ≥92 |
