3,25

10^-6K^-1

530

°C

10 ^13.0   dPas – (annealing point)

10 ^7.6     dPas – (softening point)

10 ⁴      dPas – (working point)

560

815

1270

°C

°C

°C

Maximum short-time working temperature

500

  °C

Density

2,23

g/cm³

63

10³N/mm²

Poisson’s ratio µ

0,20

1

Thermal conductivity λ (at 90 °C)

1,16

W/m . K

Temperature for the specific electrical resistance   10 ⁸ Ω . cm        t _{k 100}

248

°C

Logarithm of the electric volume resistivity

at 250 °C

at 350 °C

7,9

6,5

Ω . cm

Ω . cm

Dielectric properties (1 MHz, 25°C )

Dielectric constant (permittivity)

4,7

1

Dielectric loss factor (dissipation factor)  tan δ

55

10^-4

Refractive index (λ = 587,6nm)          nd

1,473

1

Stress-optical coefficient

4,0

10^-6 mm²/N