Optical Glass picture, AF45
 

AF45 Alkali Free Thin Glass

Special Properties

  • Alkali free in synthesis*
  • High thermal resistance (up to approx. 600°C)
  • Low thermal expansion
  • High light transmission

Typical Applications

  • CCD Covers
  • Hybrid Circuit Substrates
  • Active Matrix Displays AMLCD, TFT
  • Alkali free glass cover slips
  • Electroluminescent Displays
  • Display Technology
  • Sensor Technology
  • Thin Glass Applications
  • Alkali free microscope slides
  • Bonding Applications

The unique properties of the AF45 technical sheet glass and the many different available standard thicknesses, make AF 45 glass from Schott a good choice for various special display glass and thin glass applications. Because of the fire-polished surfaces of AF45, in most instances there is no need to further polish the surfaces of AF 45 glass before use. AF 45 is a modified borosilicate glass with a high content of BaO and Al2O3, and is alkali-free* in synthesis. AF45 features an excellent thermal resistance and a low coefficient of thermal expansion. The high optical transmission of AF45 in the visible range enables many different applications in optical, optoelectronical and sensor applications.


 

*Caused by marginal impurities in the raw materials and resulting from the manufacturing process an alkali content of 0,2 per cent of weight might be possible.

Specifications of
AF45 Zero Alkali Thin Glass*


  Show transmission curve AF45 glass

Refractive Index

  • nd = 1,5255 (588nm)

Density

  • 2,72 g/cm3

Young's Modulus

  • E = 66 kN/mm2

Coefficient of Thermal Expansion (20-300°C)

  • 4,5 x 10-6/K

Viscosity at different temperatures

Description

Viscosity


log eta (dPas)

Temperature


(°C)
Strain Point
14,5
627
Annealing Point
13,0
663
Softening Point
7,6
883
Transformation–
temperature (Tg)
-
662

Chemical Properties
Medium
5% NaOH
N/50 Na2CO3
5% HCL
Temp (°C)
95
95
95
Reaction time (h)
6
6
24
Weight loss
(mg/cm2)
2,2
0,11
5,2

Electrical Properties

  • Dielectric constant Er=6,2 (1Mhz)
  • Loss factor tan d=9 x 10-4

Thicknesses

Tk.

Tol.

Tk.

Tol.
0,050mm ±0,01 0,300mm ±0,02
0,100mm ±0,01 0,400mm ±0,02
0,145mm* ±0,02 0,500mm ±0,05
0,175mm* ±0,02 0,700mm* ±0,05
0,200mm ±0,02
*These thicknesses are not always available.
Please send us your inquiry to check for availability.

*Please consider the "Notes on technical specifications"


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