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Hard Glass with UV Protection |
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- High transparency and high thermal shock strength
- Low coefficient of thermal expansion
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Properties of Hard Glass with UV Protection
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hard glass |
normal glass |
| Thermal properties |
Thermal expansion coeff(×10-7/K) |
58 |
80 |
| Glass transition point(degreeC) |
545 |
525 |
| Deformation point(degreeC) |
625 |
600 |
| Optical properties |
Refractive index (Nd) |
1.51 |
1.52 |
| 400nm %T |
87 |
89 |
| 365nm %T |
66 |
65 |
| Transparency (%T) |
92 |
92 |
| YI*1 |
0.7 |
1.1 |
| Mechanical properties |
Young's modulus (GPa) |
71.1 |
74.0 |
| Shear modulus (GPa) |
29.7 |
30.7 |
| Poisson ratio |
0.20 |
0.21 |
| Abraded strength (MPa) |
107 |
114 |
| Other properties |
Density(kg/m3) |
2.51X103 |
2.56X103 |
| Water resistance(Na2Omg)*2 |
0.05 |
0.05 |
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*1 YI:100(1.28X-1.06Z) /Y [Measurement light source: C, XYZ; Tristimulus values]
*2 JIS R-3502 Powder Method
The data shown in this table are based on our measurement of the materials and do not constitute a guarantee that the materials will have these properties.
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OKAMOTO GLASS Co., Ltd.
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