Physical & Chemical Specification
Physical & Chemical Specification
1.)Impurites: [See Table III ]
Table III --- Impurites Table of Clear Fused Quartz Tubing and UV Quartz Tubing Unit:ppm
Elements
|
Al, Ca, Mg, Ti, Fe
|
Clear Fused Quartz Tubes
|
60
|
Elements
|
K, Na, Ca, Mg, Fe, Cu, Ni
|
UV Quartz Tubes
|
100
|
2.) Thermosstability:
Clear Fused Quartz Tubes: heated for 15 minutes under 1200°C, and than be put into 20 ±5°C water, no cracks, no brokerage, chipout: 3mm Max.
3.) Transmission Rate: ( Spectral Transmission at 1.0mm Thickness ) ( See Table IV )
Table IV
Wavelength (nm)
Transmission Rate
Product
|
190-220 |
230-280 |
290-320 |
550 |
760 |
Clear Fused Quartz Tubes
( % )
|
80 Min
|
90 Min
|
92 Min
|
92 Min
|
93 Min
|
UV-1 Quartz Tubes
( % ) |
|
8 Max
|
2 Max
|
90 Min
|
93 Min
|
UV-2 Quartz Tubes
( % ) |
0
|
8 Max
|
2 Max
|
90 Min
|
93 Min
|
UV-3 Quartz Tubes
( % ) |
0
|
8 Max
|
2 Max
|
90 Min
|
93 Min
|
UV-4 Quartz Tubes
( % ) |
|
3 Max
|
1 Max
|
80 Min
|
|
UV-5 Quartz Tubes
( % ) |
|
253.7 (nm)
68 - 73 |
|
90 Min |
93 Min |
4.) Heating Transmission:
Clear Fused Quartz Tubes heated for 2hrs under 1000°C, transmission difference comparing to room temperature less than 4% for 290nm.
5.) Anti- Crystalization:
Clear Fused Quartz Tubes heated for half hours under 1200°C, transmission: 85% Min 500nm wavelength
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