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Specifications for sitall (type CO115 M)
Sitall is Russian analogue of Zerodur.
Coefficient of linear thermal expansion,
10-7 K-1
from 213 to 333 K
from 293 to 573 K
|
0.0 + 0.6
2.8 +/- 1.0 |
Specific heat, kJ/kg x K
|
0.92 |
Thermal conductivity, W/mK
|
1.71 |
Heat resistance, K
|
823 |
Density, g/cm3
|
2.46 |
Microhardness, 107 Pa
|
784 |
Modulus of elongation (Young), 107 Pa
|
9.02 |
Poisson's ratio
|
0.28 |
Bending strength, 107 Pa
|
16.6 |
Relative abrasion hardness
(referring to BK7 type of glass)
|
1.78 |
Refractive index, nd
|
1.536 +/- 0.004 |
Mean dispersion
|
0.0102 +/- 0.0003 |
Maximum dimension of blanks, mm
diameter
side of rectangular blank
thickness |
1500
1000
300 |
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