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Flame fusion quartz glass
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Flame fusion quartz glass

Flamefusionquartzglassisatransparentquartzweightmadebyhydrogenandoxygenflamemeltinghighpuresilicasand,andobtainsquartzingotswithbetterspecificationandbetteruniformity,andthenobtainsbetterstressbyprecisionannealing(≤3nm/cm).Ithasthefeatureoflowthermalexpansioncoefficient(5.5×10-7),goodthermalstabilityandstrongphysicalandmechanicalproperties,anditismainlyusedforlargeandmedium-sizedspeculuminharshenvironments. ImpuritiesImpuritycontent ppmproductAlFeCaMgTiCuMnNiCoBKNaLiOHHP300212.140.200.400.051.200.020.42——0.100.600.800.40~200 Relationwithviscosity&temperature Viscosity(lgη,泊)temperature(℃)Strainpoint14.51025±25Annealingpoint131120±25SofteningPoint7.61600±40
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Product description
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  Flame fusion quartz glass is a transparent quartz weight made by hydrogen and oxygen flame melting high pure silica sand, and obtains quartz ingots with better specification and better uniformity, and then obtains better stress by precision annealing (≤3nm/cm). It has the feature of low thermal expansion coefficient (5.5 × 10-7), good thermal stability and strong physical and mechanical properties, and it is mainly used for large and medium-sized speculum in harsh environments.

 

Impurities

Impurity content ppm

product

Al

Fe

Ca

Mg

Ti

Cu

Mn

Ni

Co

B

K

Na

Li

OH

HP3002

12.14

0.20

0.40

0.05

1.20

0.02

0.42

0.10

0.60

0.80

0.40

~200

 

Relation with viscosity & temperature

 

Viscosity(lgη,Po)

temperature(℃)

Strain point

14.5

1025±25

Annealing point

13

1120±25

Softening Point

7.6

1600±40

 

Keyword:
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quartz
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