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OD Range 1.5mm-160mm; Silicon Dioxide>99.95%; Excellent Visual and chemical performance; high thermo-stability; anticorrosive, Thansmittance of visible light>90%. Deh-rodyolization available upon customer request, OH content less than 20ppm,15ppm,10ppm,5ppm, or 2ppm. Our products are used in areas of semiconductor, lighting and electric heating industries.



Tolerance Of Size
Range of OD, OD, WT, SIDING, Out of Round, Bow/1220mm

<6mm +/-2.0% +/-10% 12% 2.0% 2.5mm
6.0-15.00mm +/-1.25% +/-8% 10% 1.5% 2.5mm
15.00-20.00mm+/-1.25% +/-10% 15% 1.5% 2.5mm
20.00-25.00mm+/-1.25% +/-10% 15% 1.5% 3.0mm
25.00-30.00mm+/-1.35% +/-12% 15% 1.5% 3.0mm
30.00-80.00mm+/-1.55% +/-14% 15% 2.05% 3.0mm


Chemical Components



Cr Ge Fe Mg Ti Ca Al Na Li K
0.1 0.4 1.5 0.4 0.1 0.8 16 2.3 0.5 2.0


Unit: ppm

Physical Properity

Density 2.2
Coefficient of expansion 25-300 0.58
Softening Centigrade 1670
Annealing Centigrade 1210
Strain point Centigrade 1100
Youngs modulus(Pa) 7.3*10