Refractive index (nd) 1.47200 @SA:64
9
Dispersion (nF- nC) 0.00719 ~4HS
2\
Coefficient of Linear thermal expansion (x10-6/°C) 3.25 %hcn|-"F
Thermal conductivity (W/(m * °C)) 1.14 |7G+O+j
Average thermal capacity (KJ/ (kg * °C)) 0.83 .6I*=qv)NA
Maximal operation temperature (°C) e$krA!zN
Short Term wm>I;|gA)
Long Term u_+64c_7
Thermal stability |q&&"SpA
500 >cm*_26;I
450 qi!Nv$e
375 7}+U;0,)
Density (g/cm3) 2.23 &m@~R|
Elastic modulus E (kN/mm3) 64 +r0ItqkM
Hardness (HK) 480 3\J-=U
Poission's Ratio 0.2 kaBP&6|Z
Climatic resistance (ISO - 719 - HGB) Grade 1 }%z {tn
Acid resistance Grade 1 F2QX ^*
Alkali resistance Grade 1 iQry X(z
Melting temperature (°C) 1680 hq}kAv4B=
Working Point (°C) 1252 _=ani9E]uF
Softening Point (°C) 820 ± 10 BJzNh>-#=
Annealing Point (°C) 560 ± 10 4{!7T
Stress Point (°C) 510 ± 10 #3!l6]
Surface Tension (dyn/cm) 340-350 (1252 °C) *aKT&5Ch-
Dielectric constant (1MHz, 20°C) 4.6 E .2b@
Dielectric loss (1MHz, 20°C) 37 x 10-4 laVqI|0q
Dielectric strength (50MHz, 25°C) Kv/mm 16 *_Y{wNF*
Color Code (λ5/λ80) 297.6/337.2 `Mj>t(
Volume Sensitivity (log ρ) ? OrRTRW
250°C :Osw4u]JXd
350°C `?Wy;5-
8.0 nt$VH
6.5 7GN>o@ t
Environmental Protection Pb < 50 ppm .L;M-`^
As < 5 ppm y#%*aV}|B
Cd < 5 ppm 9b
K K