7980 for Germicidal Irradiation Devices
- Product Item : AT-61151
- Category： Glass-Ceramic Optical Substrates
- Product description：UVC (200 – 280nm) light has long been recognized as an effective method for deactivating pathogens on surfaces, in the air or in liquids.The COVID-19 pandemic has highlighted the urgency of implementi
7980 for Germicidal Irradiation Devices
UVC (200 – 280nm) light has long been recognized as an effective method for deactivating pathogens on surfaces, in the air or in liquids.The COVID-19 pandemic has highlighted the urgency of implementing solutions to minimize the spread of harmful pathogens. Many new devices are now being commercialized which utilize UVC germicidal irradiation and many of these require components which transmit UVC wavelengths efficiently. High Purity Fused Silica 7980 is available in large sized format which is ideal for transmitting energy from sources such as mercury vapor lamps (λ~254),LEDs (λ~265-280), or Excimer Lamps (λ~222nm).
Mechanical Properties
|
unless otherwise stated, all values @ 25 °C |
|
|
Elastic (Young’s) Modulus |
73 GPa |
|
Shear Modulus |
31 GPa |
|
Modulus of Rupture, abraded |
52.4 MPa |
|
Bulk Modulus |
35.9 GPa |
|
Poisson’s Ratio |
0.16 |
|
Density |
2.20 g/cm3 |
|
Knoop Hardness (100g load) |
522 kg/mm2 |
|
Tensile Strength |
54 MPa |
|
Compressive Strength |
1.14 GPa |
Thermal Properties
|
Glass Code: 7980 |
Viscosity |
|
Softening Point* 1585 °C |
107.6 poises |
|
Annealing Point* 1042 °C |
1013 poises |
|
Strain Point* 893 °C |
1014.5 poises |
|
Speciic Heat |
0.77 J/(g K) |
|
Thermal Conductivity |
1.38 W/(m K) |
|
Thermal Difusivity |
0.0075 cm2/s |
|
Thermal Expansion** (ppm/C): |
|
|
5 °C to 35 °C |
0.52 x 10-6 |
|
0 °C to 200 °C |
0.57 x 10-6 |
|
-100 °C to +200 °C |
0.48 x 10-6 |
ASTM Procedures: *C-598, ** E-228
Refractive Index and Dispersion: 7980
Conditions: 22 °C, 760 mm Hg, N2
|
Wavelength[vacuum][nm] |
Refractive Index2n |
ThermalCoefficient∆n/∆T3 [ppm/C] |
Polynomial Dispersion Equation Constants1, 22 ˚C |
|
|
1128.950 |
1.448866 |
9.6 |
A0 |
2.104025406E+00 |
|
1014.260 nt |
1.450241 |
9.6 |
A1 |
-1.456000330E-04 |
|
852.344 ns |
1.452463 |
9.7 |
A2 |
-9.049135390E-03 |
|
706.714 nr |
1.455144 |
9.9 |
A3 |
8.801830992E-03 |
|
656.454 nC |
1.456364 |
9.9 |
A4 |
8.435237228E-05 |
|
632.990 |
1.457016 |
10.0 |
A5 |
1.681656789E-06 |
|
587.725 nd |
1.458461 |
10.1 |
A6 |
-1.675425449E-08 |
|
546.227 ne |
1.460076 |
10.2 |
A7 |
8.326602461E-10 |
|
486.269 nF |
1.463123 |
10.4 |
|
Sellmeier Dispersion Equation Constants2, 22 ˚C |
|
435.957 nG |
1.466691 |
10.6 |
||
|
404.770 nh |
1.469615 |
10.8 |
A1 |
0.68374049400 |
|
365.119 ni |
1.474539 |
11.2 |
A2 |
0.42032361300 |
|
334.244 |
1.479764 |
11.6 |
A3 |
0.58502748000 |
|
312.657 |
1.484493 |
12.0 |
|
|
|
253.728 |
1.505522 |
13.9 |
B1 |
0.00460352869 |
|
228.872 |
1.521154 |
15.5 |
B2 |
0.01339688560 |
|
214.506 |
1.533722 |
17.0 |
B3 |
64.49327320000 |
|
206.266 |
1.542665 |
18.1 |
|
∆n/∆T Dispersion Equation Constants3, 20-25 ˚C |
|
194.227 |
1.558918 |
20.3 |
||
|
184.950 |
1.575017 |
22.7 |
C0 |
9.390590 |
|
|
C1 |
0.235290 |
||
|
C2 |
-1.318560E-03 |
|||
|
C3 |
3.028870E-04 |
|||
|
|
Other Optical Properties |
|||
|
nF’-nC’ |
0.006797 |
|||
|
Stress Coefficient |
35.0 nm/cm MPa |
|||
|
|
Abbe Constants: |
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