UV stop quartz tube

This cerium-added quartz tube can effectively prevent all radiation of UV-B and UV-C ultraviolet and most radiation of UV-A ultraviolet .It is the best materials to prevent UV with best transparent performance. It can be used to make quartz halogen lamp , gas discharge lamp and other UV lamp-house , which will effectively protect human and object from hurt of ultraviolet and maintain the best efficiency of light transmission.

Dimensional Tolerance

Range of OD OD WT Siding Out of Round Bow/1220mm
≤6mm ±2.0% ±10% 12% 2.0% 2.5mm
6.00-15.00mm ±1.25% ±8% 10% 1.5% 2.5mm
15.00-20.00mm ±1.25% ±10% 15% 1.5% 2.5mm
20.00-25.00mm ±1.25% ±10% 15% 1.5% 3.0mm
25.00-30.00mm ±1.35% ±12% 15% 1.5% 3.0mm

Chemical Composition?? Unit: ppm

Cr Ge Fe Mg Ti Ca Al Na Li K OH
＜0.5 ＜0.4 1.5 0.5 2.5 2.3 25 2.5 0.6 2.5 1-50

Physical Properties

Density? 20℃ kg.m-3 (×103) 2.2
Coefficient of expansion? 25-300℃? ℃-1 (×10-6) 0.58
Softening point???? ℃ 1620
Annealing point??? ℃ 160
Strain point??????? ℃ 1060
Youngs modulus??? Pa 7.1×105

Spectral Transmission at 1.0mm Thickness

Nm ＜220 230-280 290-330 315 350 380 590 780
% 0 ＜19 0 15 88 92 93 93
12.0±0.20 1.0±0.10 12% 1.5% 2.5mm
13.0±0.22 1.0±0.10 12% 1.5% 2.5mm
12.0±0.3 1.5±0.10 12% 1.5% 2.5mm