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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

ppb

Element Analytical value Element Analytical value
Al <10 Co <10
Fe <10 Ni <10
Ti <10 P <10
Ca <10 B <10
Mg <10 Na <10
Mn <10 K <10
Cr <10 Li <10
Cu <10 Zr <10
OH <1(ppm) Cl <2000
(Typical values Not guaranteed)

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
(Typical values Not guaranteed)

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Transmission


Transmission

(Typical values Not guaranteed)

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Refractive lndex



Wavelength(nm,in air)
25°C in air
20°C in air
365.015 (i) 1.47475 1.47469
404.656 (h) 1.46982 1.46977
435.835 (g) 1.46689 1.46684
486.133 (F) 1.46333 1.46328
546.075 (e) 1.46028 1.46023
587.562 (d) 1.45866 1.45861
656.273 (c) 1.45657 1.45652

Measuring accuracy ±5×10-6

20°C-25°C in air
Wavelength(nm,in air)		 1×10－6/°C
dn/dt
365.015 (i) 11.5
404.656 (h) 11.0
435.835 (g) 10.7
486.133 (F) 10.5
546.075 (e) 10.2
587.562 (d) 10.2
656.273 (c) 10.2

Measuring accuracy ±0.6×10-6

(Typical values Not guaranteed)

Optical Qualities


Item Grade
Bubbles 0-0.03mm2/100cm3
Striae Grade A in one direction(As per Mil-G-174)
Birefrengence (Strain) 20nm/cm and under
(Typical values Not guaranteed)

Physical properties


ltem Unit Value ltem Unit Value
Density g/cm3 2.2 Coefficient of thermal expansion 1/K 5.5×10-7
Young's module GPa 72.5      
Torsional rigidity GPa 31.4 Softening point °C 1600
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(25°C) kJ/kgK 0.74
Vickers hardness GPa 8.8-10.1 Thermal conductivity ratio(25°C) W/mK 1.3
Knoop hardness GPa 6.4-7.0 Thermal conductivity ratio(100°C) W/mK 1.4
(Typical values Not guaranteed)



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