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AF 45
DESCRIPTION
| AF 45 has specific properties and is available in many different thicknesses with tight tolerances which are exceptionally well suited for many applications. This thin glass type can be used without grinding and polishing the surface because of its special fire-polished surface. AF 45 is a modified borosilicate glass with high contents of BaO and Al2O3 and is alkali-free in synthesis. This product features excellent thermal resistance, a low coefficient of thermal expansion, low shrinkage after heat treatment and high light transmission. |
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SHEET SIZES
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Usually 14" x 17", sometimes 12" x 16". | ||
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AVAILABLE THICKNESSES
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Thickness
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Tolerance
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Thickness
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Tolerance
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| 0.050 mm | ± 0.010 mm | 0.07 mm | ± 0.010 mm |
| 0.100 mm | ± 0.010 mm | .0.145 mm | ± 0.020 mm |
| 0.200 mm | ± 0.020 mm | 0.300 mm | ± 0.020 mm |
| 0.400 mm | ± 0.020 mm | 0.700 mm | ± 0.050 mm |
| 1.10 mm | ± 0.050 mm | ||
PROPERTIES
| Refractive Index: | nd (λ = 588 nm) = 1.5255 |
| Transmission (estimated at 1.1 mm thick): |
@ 300 nm 10% | @ 345 nm 80% |
| @ 320 nm 40% | 380-920 nm 90%+ |
| Mechanical and Thermal: |
Density | 2.72 g/cm3 |
| Young's Modulus | E = 66 KN/mm2 | |
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Thermal Coefficient of Expansion (0-300°C) = 45 x 10-7
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| Strain Point | 627°C | |
| Chemical: |
Reaction time (hr.)
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Temperature
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Wt. Loss (mg/cm2)
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5% HCL (24 hr.)
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95°C
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5.2
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N/50 Na2CO3 (6 hr.)
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95°C
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0.11
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5% NaOH (6hr.)
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95°C
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2.2
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| Electrical: | Dielectric Constant (1 MHz) | r = 6.2 |
| Dielectric Loss Factor (1 MHz) | tanδ = 9 x 10-4 |
APPLICATIONS
| LCD (active matrix), electroluminescent displays, CCD covers, solar cells, hybrid circuits and coating substrates. |