test tube
1.specification is OD14mm*WT1.1mm*L1240mm
2.hydroxy content is less than 25
3.efficient,healthy
test tube
1.widely used in quartz halogen lamps,high density discgarge lamps and other UV light
2.efficient,healthy,no harm to health,no pollution,economic,long life
3.it can adjust to temperature of space automatically
6. UV stop glass tube is doped Ce,can stop nearly all the radiation of ultraviolet ray of UVB,UVC and all of ultraviolet ray of UVA,it is the ideal material of the most spectral transmission
4.dinmension tolerance
Range of OD | OD | WT | Siding | Out of round | Bow/1220mm |
less than 6mm | more or less2.0% | more or less10% | 12% | 2.0% | 2.5mm |
6.00 to 15.00mm | more or less 1.25% | more or less8% | 10% | 1.5% | 2.5mm |
15.00 to 20.00mm | more or less1.25% | more or less10% | 15% | 1.5% | 2.5mm |
20.00 to 25.00mm | more or less1.25% | more or less10% | 15% | 1.5% | 3.0mm |
25.00 to 30.00mm | more or less1.35% | more or less12% | 15% | 1.5% | 3.0mm |
5.chemical composition
Cr | Ge | Fe | Mg | Ti | Ca | Al | Na | Li | K | OH |
20 | 0.4 | 1.5 | 0.4 | 4.6 | 1.0 | 16 | 2.3 | 0.5 | 2.0 | less than 25 |
6.spectral transmission at 1.0mm thickness
Nm | less than220 | 255 | 280 | 315 | 350 | 380 | 590 | 780 |
% | 89 | 91 | 93 | 93 | 93 | 93 | 93.2 | 93.4 |
7.physical properties
Density 20°Ckg/m3 | 2.2 |
Coefficient of expansion 25-300°C/°C | 0.58 |
Softening point(°C) | 1670 |
Annealning point(°C) | 1210 |
Strain point(°C) | 1110 |
Youngs Modulus | 7.3×105 |
