Item | Value |
Coefficient of Expansion: | 7,1 x10-6/K (-30 °C to +70 °C) |
8,3 x10-6/K (+20 °C to +300 °C) | |
Viscosities: | |
Softening Point (107,6 dPa): | 719 °C |
Annealing Point (1013 dPa): | 557 °C |
Transformation temperature Tg: | 557 °C |
Thermal conductivity: | 1,114 W/(m x K) |
Specific heat capacity: | 0,858 J/(g x K)(20 °C ; 100°C) |
Item | Unit | Value |
Density | g/cm3 | 2.51 |
Yong's Module E | GPa | 82 x 103 N/mm2 |
Poisson's ratio μ | 0,206 | |
Compression strength | GPa | - |
Bending strength | MPa | - |
Tensile strength | MPa | - |
Torsional rigidity | GPa | - |
Vickers hardness | GPa | -- |
Knoop Hardness HK 0,1/20 (ISO9385) | - | 610 |
Abrasion Aa* | - | ve = 63,96 vd = 64,17 |
Refractive index nd | - | - |
Softening point | ºC | - |
Annealing point | ºC | - |
Strain point | ºC | - |
Specific heat(26ºC) | kJ/kgK | - |
Thermal conductivity ratio(26ºC) | cal/cm.sec.ºC | - |
Thermal conductivity ratio(100ºC) | Cal/cm.sec.ºC | - |
Refractive Index name | Wavelength (nm) | Refractive Index |
ni | 365,0 | 1.53627 |
nh | 404,7 | 1,53024 |
ng | 435,8 | 1,52668 |
nF' | 480,0 | 1,52283 |
nF | 486,1 | 1,52238 |
ne | 546,1 | 1,51872 |
nd | 587,6 | 1,51680 |
nD | 589,3 | 1,51673 |
n632,8 | 632,8 | 1,51509 |
nC | 643,8 | 1,51472 |
nc | 656,3 | 1,51432 |
nr | 706,5 | 1,51289 |
ns | 852,1 | 1,50980 |
nt | 1014,0 | 1,50731 |
Applying Fields: | Typical Applications 1).Demanding optical applications 2).Base material for precision optics 3).Windows, lenses, and prisms 4).Substrates for mirror and filter coatings 5).Measurement and sensor-technology use 6).Lenses and dispersion prims |
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