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

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