Refractive index (nd) 1.47200 z%cpV{Nu
Dispersion (nF- nC) 0.00719 ci~pM<+
Coefficient of Linear thermal expansion (x10-6/°C) 3.25 8ezdU"
Thermal conductivity (W/(m * °C)) 1.14 6)B6c. 5o
Average thermal capacity (KJ/ (kg * °C)) 0.83 ^Cm9[ 1p
Maximal operation temperature (°C) & &\HE7*
Short Term !qjIhZi
Long Term B]xZ
4 Y
Thermal stability -(Y ( K!n
500 | ]DJz
450 }h PFd
375 S3oSc<&2
Density (g/cm3) 2.23 wx,yx3c (
Elastic modulus E (kN/mm3) 64 G?t <4MT v
Hardness (HK) 480 }%;o#!<N(@
Poission's Ratio 0.2 tAM t7p-
Climatic resistance (ISO - 719 - HGB) Grade 1 ",hPy[k
Acid resistance Grade 1 MI,b`pQ
Alkali resistance Grade 1 N7b+GqYpF>
Melting temperature (°C) 1680 NLz[ F`I
Working Point (°C) 1252 1oSrhUTy
Softening Point (°C) 820 ± 10 #_b
U/rk)*
Annealing Point (°C) 560 ± 10 4%( \y "T
Stress Point (°C) 510 ± 10 [1\k'5rp
Surface Tension (dyn/cm) 340-350 (1252 °C) 3wQUNv0z
Dielectric constant (1MHz, 20°C) 4.6 l; ._
?H
Dielectric loss (1MHz, 20°C) 37 x 10-4 yX' f"*
Dielectric strength (50MHz, 25°C) Kv/mm 16 >)&]Ss5J
Color Code (λ5/λ80) 297.6/337.2 ^D=1%@l?#
Volume Sensitivity (log ρ) i#lnSJ08
250°C s? irT;=
350°C "GTlJqhk
8.0 1zDat@<H
6.5 (zO)J`z>
Environmental Protection Pb < 50 ppm +@ FM~ q
As < 5 ppm \.`;p
Cd < 5 ppm 007(k"=oV
