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VAD-based Anhydrous Synthetic Fused Silica SK1310

SK-1310 is the anhydrous synthetic fused silica among the SK-1300 series products of VAD-based synthetic fused silica.
In addition to the high reliability of heat resistance,mechanical strength,and chemical resistance maintained by SK-1300,photolytic absorption is not generated to the infrared area of 2.73 μm,because it doesn' t contain hydrogenous radicals.SK-1310 products are fully renovated materials with the maximum transmission applicable to the entire ultraviolet,visible,and infrared areas.
The physical and chemical characteristics are prominent similar to the SK-1300 products in a broad range of applications in advanced technological industries such as semiconductors and opticals.

Applications:

  • Optical fibers
  • Optical elements for ultraviolet and infrared lenses or windows
  • All types of cells for ultraviolet or infrared transmission of entire areas of spectrophotometer
  • Electrical-discharge lamp tubing

Typical lmpurity Analysis

ppm

Element Analytical value Element Analytical value
Al <0.01 Co <0.01
Fe <0.01 Ni <0.01
Ti <0.01 P <0.01
Ca <0.01 B <0.01
Mg <0.01 Na <0.01
Mn <0.01 K <0.01
Cr <0.01 Li <0.01
Cu <0.01 Zr <0.01
OH <1 Cl 1000

Chemical Resistance


Solution Treatment temperatures(°C) &hours(H) Weight loss(mg/cm2)
H2O 95 45 0.0001-0.0002
1/100 N HNO3 115 24 0.005 -0.01
5% NaOH 100 10 1.30

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Transmission


Transmission


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Refractive lndex


Wavelength(nm) 15°C 25°C 35°C
237.83 1.5156 1.5157 1.5158
248.20 1.5093 1.5094 1.5095
274.87 1.4967 1.4968 1.4969
334.15 1.4805 1.4806 1.4807
365.48 (i) 1.4753 1.4754 1.4755
404.65 (h) 1.4704 1.4705 1.4706
435.83 (g) 1.4674 1.4675 1.4676
546.07 (e) 1.4608 1.4609 1.4610

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Optical Qualities


ltem Grade
Bubbles 0-0.03mm2/100cm3
Striae Grade A in one direction(As per Mil-G-174)
Birefrengence(Strain) 10nm/cm and under

Physical properties


ltem Unit Value ltem Unit Value
Density g/cm3 2.20 Coefficient of thermal expansion 1/K 5.5×10-7
Young's module GPa 71.6      
Torsional rigidity GPa 31.4 Softening point °C 1700
Poisson's ratio   0.17 Annealing point °C 1160
Compression strength GPa 1.1 Strain point °C 1060
Bending strength MPa 69      
Tensile strength MPa 55 Specific heat(26°C) kJ/kgK 0.74
Vickers hardness GPa 8.8-10.1      



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