Refractive index (nd) 1.47200 (BGipX4
Dispersion (nF- nC) 0.00719 >6dgf`U
Coefficient of Linear thermal expansion (x10-6/°C) 3.25 3OZ}&[3
Thermal conductivity (W/(m * °C)) 1.14 BdKwWgi+a
Average thermal capacity (KJ/ (kg * °C)) 0.83 EAkP[au.
Maximal operation temperature (°C) p[eRK .$!
Short Term ;uDFd04w
[
Long Term X<{m;T `
Thermal stability Cnr48ukq
500 ~;W%s
450 b1OB'P8
375 D5p22WY
Density (g/cm3) 2.23 <f6Oj`{f4
Elastic modulus E (kN/mm3) 64 cjW]Nw
Hardness (HK) 480 Pm_=
Poission's Ratio 0.2 WDZi
@9X_
Climatic resistance (ISO - 719 - HGB) Grade 1 HHYcFoJwYN
Acid resistance Grade 1 gc=e)j@
Alkali resistance Grade 1 P:vy
Melting temperature (°C) 1680 0>`69&;g|
Working Point (°C) 1252 3{l"E(qqZ
Softening Point (°C) 820 ± 10 4Uiqi{}
Annealing Point (°C) 560 ± 10 r:cUAe7#
Stress Point (°C) 510 ± 10
_6' g]4
Surface Tension (dyn/cm) 340-350 (1252 °C) 'FhnSNT(4=
Dielectric constant (1MHz, 20°C) 4.6 xpk|?/6
Dielectric loss (1MHz, 20°C) 37 x 10-4 Q'VS]n
Dielectric strength (50MHz, 25°C) Kv/mm 16 ||4Dtg
K
Color Code (λ5/λ80) 297.6/337.2 ;GAYcVB
Volume Sensitivity (log ρ) E(8g(?4
250°C y)}aySQK^
350°C +9X[gef8
8.0 1dcy+ !>
6.5 'w2;oO
Environmental Protection Pb < 50 ppm [;I8 ZVE
As < 5 ppm A
M2M87{t
Cd < 5 ppm 4=Ey\Px