D263 T Borosilicate Thin Glass

Special Properties

• Low roughness (typ. < 1nm RMS)
• Excellent flatness
• Clear and practically colorless appearance
• Very thin standard thicknesses (down to 0,03mm)

Typical Applications

• Cover glass
• Thin glass substrates
• Ultra thin glass applications
• Semiconductor cover glass
• CCD chip window
• Display glass (PMLCD, AMLCD & TFT)
• Electroluminescent displays
• Substrates for optical coatings
• Optical windows
• Ultra thin glass applications
• Sensor covers
• Thin glass and microsheet applications

The specific properties and a large range of standard thicknesses make the speciality thin glass D263 a good choice for many technical glass applications. The D263 thin and ultra thin glass substrate materials feature an excellent flatness and a very good surface quality. Due to the smooth fire-polished surfaces, D 263 T usually can be used without the requirements of additional mechanical polishing. The roughness of D 263 typically is better than 1nm (RMS). D263 glass is made by Schott by melting very pure raw materials. The speciality thin glass is very resistant to chemical attack. D263 glass has a high and uniform transmission in the visible range. But also in the range of up to 3000nm, D 263 T offers a high infrared transmission that cannot be achieved by most other glass materials. D263 glass is available from stock at various thin and ultra thin thicknesses at very small thickness tolerances.

To request windows or substrates made of D 263 T with your individual dimensions, please click the button below:

Specifications of D 263 T Thin Glass

 

Optical Properties

• Optical Transmission Spectrum of D263 (Tk. 0,15mm)
• Optical Transmission Spectrum of D263 (Tk. 0,70mm)
• UV-Transmission of D263 (Tk. 0,70mm)
• Abbe number: v_e = 55

Refractive Index
Description	Wavelength (nm)	Refractive Index
ng	436	1,5354
nF'	480	1,5305
nF	486	1,5300
ne	546	1,5255
nd	587,5	1,5231
nD	589,3	1,5230
nC'	644	1,5209
nC	656	1,5204

Mechanical Properties

• Density: 2,51 g/cm³
• Young's modulus E: 72,9 kN/mm²
• Poisson's ratio μ: 0,208
• Torsion modulus G: 30,1 kN/mm²
• Knoop hardness HK₁₀₀: 590

Thermal Properties

• Coefficient of mean linear thermal expansion
  (static measurement): 7,2 x 10^-6/K (20-300°C)
  
• Viscosities:
  • Working Point (10⁴ dPa): 1051°C
  • Softening Point (10^7,6 dPa): 736°C
  • Annealing Point (10¹³ dPa): 557°C
  • Strain Point (10^14,5 dPa): 529°C
• Transformation temperature Tg: 557°C
• Mean specific heat capacity (20-100°C):
  0,82 J/(g x K)

Chemical Properties

• Hydrolytic Resistance acc. to DIN ISO 719:
  • Hydrolytic Class HGB 1
  • Equivalent of Alkali (Na₂O) per g of glass grains:
    20 μg/g
• Acid Resistance acc. to DIN 12 116:
  • Acid Class S2
  • Half surface weight loss after 6h:
    1,4 mg/dm²
• Alkali Resistance acc. to DIN ISO 695:
  • Alkali Class A2
  • Surface weight loss after 3h:
    88 mg/dm²

Electrical Properties

• Dielectric constant ε_r: 6,7 (1Mhz)
• Dielectric Loss tangent (tan δ): 61 x 10^–4 (1 MHz)
• Specific AC-Volume Resistivity ρ_D (Ω x cm):
  • 1,6 10⁸ (250°C / 50 Hz)
  • 3,5 x 10⁶ (350°C / 50 Hz)

Thicknesses
Thickness	Tolerance	Thickness	Tolerance
0,030mm	±0,008	0,300mm	±0,02
0,050mm	±0,01	0,400mm	±0,02
0,070mm*	±0,01	0,500mm*	±0,05
0,100mm	±0,015	0,550mm	±0,05
0,145mm	±0,015	0,700mm	±0,05
0,175mm	±0,015	0,900mm*	±0,05
0,210mm	±0,02	1,100mm	±0,05
*These thicknesses are not always available. Please send us your inquiry in case of need.

All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on technical specifications"