Refractive index (nd) 1.47200 p$0;~1vH
Dispersion (nF- nC) 0.00719 VgN`'
iC`I
Coefficient of Linear thermal expansion (x10-6/°C) 3.25 (3&@c!E
Thermal conductivity (W/(m * °C)) 1.14 '[{M"S
Average thermal capacity (KJ/ (kg * °C)) 0.83 6oL-Atf
Maximal operation temperature (°C) ;_%61ZI?M<
Short Term -P!vCf^{
t
Long Term 72@8M
Thermal stability ^kch]?
500 _Oh;._PS
450 cJGA5m/{I
375 v'2EYTVNJD
Density (g/cm3) 2.23 Z"mpE+U*
Elastic modulus E (kN/mm3) 64 U^snb6\5
Hardness (HK) 480 #Jq@p_T"
Poission's Ratio 0.2 +d2+w1o^V
Climatic resistance (ISO - 719 - HGB) Grade 1 <YUc?NF
Acid resistance Grade 1 0/#XUX 4
Alkali resistance Grade 1 7Q/v#_e(
Melting temperature (°C) 1680 s@'};E^]@r
Working Point (°C) 1252 #Z"N\49
Softening Point (°C) 820 ± 10 LrsP4G
Annealing Point (°C) 560 ± 10 Z>Rd6o'
Stress Point (°C) 510 ± 10 ^>72<1U%
Surface Tension (dyn/cm) 340-350 (1252 °C) [64K?l0&
Dielectric constant (1MHz, 20°C) 4.6 wGBQ.Ve[
Dielectric loss (1MHz, 20°C) 37 x 10-4 $xvEYK
Dielectric strength (50MHz, 25°C) Kv/mm 16 H2zd@l:R
Color Code (λ5/λ80) 297.6/337.2 /#G^?2oM
Volume Sensitivity (log ρ) mRW(]OFIai
250°C "a?k #!E
350°C '_4u,
\SG
8.0 `i9WnPRt
6.5 ^8
AV #a
Environmental Protection Pb < 50 ppm <(>v|5K0]
As < 5 ppm st:[|`
Cd < 5 ppm ePrbG4xv