Borosilicate Glass Specs.

 

Borofloat 33®  and Duran® Material Properties

Used in the Manufacture of Gas-Fusion Substrates

Mechanical Properties
  • Density (25°C) ρ 2.2g/ cm3
  • Young’s Modules E 64 kN/mm2
  • Poisson’s Ratio μ 0.2
  • Knoop Hardness HK 0.1/20 480
  • Bending Strength σ 25 MPa
Thermal Properties
  • Coefficient of Linear Thermal Expansion α (20-300°C) 3.25 x 10-6/°K
  • Specific Heat Capacity cp (20-100°C) 0.83 KJ/kg°K
  • Thermal Conductivity λ (90°C) 1.2 W/m°K
Optical Properties at λ = 589.3 nm
  • Index of Refraction n 1.47133
  • Abbe Constant ve=(ne-1)/(nf΄-nc’) 65.41
  • Refractive Index nd (λ587.6nm) 1.47140
  • Dispersion nF-nC 71.4 x 10-4
  • Stress Optical Coefficient K 4.0 x 10-6mm2/N

Available Standard Sizes

Borofloat 33® Sheet Glass                                                              Duran Tube Sizes     

 

Plates-and-Tubes

                                  Standard Size: 2300mm x 1700mm                                                   Standard Diameter Range: 3mm – 325mm
                                  Special Order Size: 2300mm x 2300mm                                           Standard Wall Thickness: 0.7 – 10mm
                                  Plate Thickness Range: 0.7 – 25.4mm                                             Maximum Tube Length: 1500mm