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DESIGN

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Glasceramic

SQ-Glasses are synthetic quartz glasses produced from high purity SiCl4, by the flame pyrolysis method. These glasses are free of bubbles and inclusions and are distinguished from other glasses by good transmission in UV and visible spectral range. The types SQ0 – SQ2 are different regarding to homogeneity, layers, inclusions and transmission in the deep UV range.
Eigenschaften
Devitrification

1200 t0 1300 °C

Coefficient of thermal Expansion

Thermal conductivity (1000 °C)

Estimated costs of ownership (anno)

Slip at 1200 °C

Purit
y
Silicon

No

Stable

Similar to silicon wafer

Similar to wafer

100%

None

0.35
Quartz

Yes

Plastic, Warps

-5 Times less

-10 Times higher

-380%

N.A.

4.1
SiC

No

Stable

-1.85 Times more

-10% less

-195%

Yes

1.45
SiC

No

Stable

-1.85 Times more

-10% less

-195%

Yes

1.45
Bars

SQ-Glasses are synthetic quartz glasses produced from high purity SiCl4, by the flame pyrolysis method. These glasses are free of bubbles and inclusions and are distinguished from other glasses by good transmission in UV and visible spectral range. The types SQ0 – SQ2 are different regarding to homogeneity, layers, inclusions and transmission in the deep UV range.
Eigenschaften
Devitrification

1200 t0 1300 °C

Coefficient of thermal Expansion

Thermal conductivity (1000 °C)

Estimated costs of ownership (anno)

Slip at 1200 °C


Purity
Silicon

No

Stable

Similar to silicon wafer

Similar to wafer

100%

None

0.35
Quartz

Yes

Plastic, Warps

-5 Times less

-10 Times higher

-380%

N.A.

4.1
SiC

No

Stable

-1.85 Times more

-10% less

-195%

Yes

1.45
SiC

No

Stable

-1.85 Times more

-10% less

-195%

Yes

1.45
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