Low Iron Soda-Lime Glass
Low iron soda lime is created by using high quality grades of silica sand that are virtually free of iron oxides. This results in a transparent, “water white” glass that has higher transmission characteristics compared to normal soda lime. The difference is usually 2-3% at thicknesses 10mm and up to 8% greater transmission for thicker low iron glass. Even higher transmission (up to 98-99% total transmission) can be achieved by specifying an anti-reflective thin film coating. (Refer to our Thin Film Coating Brochure).
Features
- Higher light transmission
- Can be AR coated for super high transmission
- Can be chemically strengthened
- Good flatness
- No green tint
Applications
- Port projection
- Display
- Lighting
- Optical
- Architectural
Dimensions
Thicknesses
1mm – 12mm thick
Sizes
Up to 130" x 96" (3302 x 2438.4mm)
Physical Properties
Density
2530 kg/m3
(158 lb/ft3)
Modulus of Elasticity
7.2 x 1010 Pa
(10.4 x 106 psi)
Modulus of Rigidity
3.0 x 1010 Pa
(4.3 x 106 psi)
Bulk Modulus
4.3 x 1010 Pa
(6.18 x 106 psi)
Poisson’s Ration
0.23
Specific Gravity
2.53
Coefficient of Thermal Stress
0.62 mPa/°C
(50 psi/°F)
Thermal Conductivity
0.937 W.m/m2°C
(6.5 btu.in/hr.°F.ft2)
Specific Heat
0.21
Coefficient of Linear Expansion
8.9 x 10-6 strain/°C
(4.9 x 10-6 strain/°F)
Hardness (Moh’s Scale)
5 to 6
Refractive Index (Sodium D line)
1.523
(1 μm)
1.511
(2 μm)
1.499
Softening Point
726 °C
1340 °F
Annealing Point
546 °C
1015 °F
Strain Point
514 °C
957 °F
Emissivity (Hemispherical) at 75°F
0.84
Low Iron vs. Soda-Lime Glass
