• Glass for Special Applications
  Products & Applications
• Anti-reflective glass
• Filter glass
• Glass processing
• Glass Wafer & Substrates
• Microscope glasses
• Ophthalmics
• Radiation Shielding Glass
• Signal optics glasses
• Thin glass and High transmission glass
• Welding protection glass
• Glass for Special Applications Services
• Contact
• About Glass for Special Applications
• Press
• Downloads

Characteristics of AF 45™ thin glass

AF 45™ is an alkali free borosilicate with a high proportion of BaO and Al2O3. Alkali-free raw materials are used for the synthesis of AF 45™. Characteristics: Dimensions Thermal characteristics Mechanical characteristics Chemical characteristics Electrical characteristics Optical characteristics Downloads

Outstanding:

Alkali-free with regard to raw materials used Low coefficent of thermal expansion Excellent thermal resistance High light transmission Excellent surface quality

Dimensions

Max: 440 mm x 360 mm (size on request) Thicknesses: 0.05 mm to 0.5 mm (special thicknesses on request) Option to supply dimensions, processing and tolerances according to customer specifications. Rectangular formats in all thicknesses; round / wafer formats 0.1 mm and above

nominal thickness [mm] thickness tolerancey variation within the lot (from sheet to sheet) [mm] thickness variation within the sheet referenced to net width of 360 mm [µm] 0.05 ± 0.010 ≤ 10 0.10 ± 0.015 ≤ 20 0.145 ± 0.015 ≤ 20 0.20 ± 0.020 ≤ 20 0.30 ± 0.020 ≤ 20 0.40 ± 0.020 ≤ 20 0.50 ± 0.050 ≤ 30

Edge processing:

Ground to C-shape or chamfered Conventional or laser cut edge Orientation corner

The following characteristics are based largely on the measurement results of the latest standards and measuring procedures. The specified characteristics refer in part to one time measurements and are not continually monitored. SCHOTT reserves the right to update the data to the latest technology.

Thermal characteristics

Viscosity and temperatures Description Viscosity log η [dPas] Temperature () [°C] Strain point 14.5 627 Annealing point 13.0 663 Softening point 7.6 883 Transformation temperature Tg in °C 662 Expansion factor α Coefficient of thermal expansion α(20-300°C) in 10 -6 K -1 (static measurement) 4.5

Mechanical characteristics

Density ρ in g/cm3 2.72 Stress optical coefficient C in 1.02 · 10-12 m2/N 3.2 Young's Modulus E in kN/mm2 66.0 Poisson number µ 0.235 Modulus of torsional shear G in kN/mm2 26.7 Knoop hardness HK100 555

Chemical characteristics

Hydrolytic resistance according to DIN ISO 719 Hydrolytic classification HGB 1 Base equivalent per g glass grains in µg/g 6.8 Acid resistance according to DIN 12116 Acidity classification 4 50% surface loss after 6 h in mg/dm2 > 250 Alkali resistance according to DIN ISO 695 Classification A 3 Surface loss after 3 hours in mg/dm2 460

Electrical characteristics

Dielectricity constants εr at 1 MHz 6.2 Dielectrical loss factor tan δ at 1 MHz 9 · 10-4 Electrical volume resistance ρD in Ω · cm at specified temperature ρD for direct current T = 250 °C 6.0 · 10 13 T = 350 °C 3.2 • 101 T = 500°C 1.6 · 109 Temperature tk100 in °C for the specific electrical volume resistance 108 Ω · cm 610

Optical characteristics

Refractive indices Pre-processing of samples ng 1.5359 "as drawn" nF´ 1.5318 nF 1.5313 ne 1.5275 nd 1.5255 nD 1.5254 nC´ 1.5233 nC 1.5229 Abbe number νe 62.2

Downloads

Transmission AF 45™

Application information AF 45™

For more information please contact us by mail!