We use cookies necessary for the functioning and optimization of our website. We do not retain any personal data once the session has ended except that which is necessary to process an order that you have placed through the website.

For more information, please read our Privacy Policy.

 in 

Histology Supplies Overview
Glass Microscope Slides
Coverslips

Schott D263M Glass Coverslips Technical data

Description

Schott D263M is a colorless borosilicate glass with a very low iron content. It meets requirements laid down in ISO 8255-1. It has high spectral transmission, excellent flatness and a refractive index finely adapted to microscopes. Very good resistance to chemical attack. Fire polished.

Applications

The characteristics of this special composition substrate glass makes it suitable for a variety of applications, including:

  • Microscope cover glass
  • Thin film substrate
  • Touch control panels
  • Solar cells
  • Sensors

Mechanical Properties

Density p in g/cm3 2.51
Stress optical coefficient C in 1.02 · 10-12 m2/N 3.4
Young's Modulus E in kN/mm2 72.9
Poisson number µ 0.208
Modulus of torsional shear G in kN/mm2 30.1
Knoop hardness HK100 590

Electrical Properties

Dielectric constant Ԑr at 1 MHz 6.7
Dielectrical loss factor tan δ at 1 MHz 61·10-4
Electrical volume resistance pD in Ω · cm at defined temperatures pD for alternating current 50 Hz
  θ = 250°C 1.6 · 108
  θ = 350°C 3.5 · 106

Thermal Characteristics

Viscosity and Temperature
Description Viscosity log Ƞ [dPas] Temperature θ [°C]
Strain point 14.5 529
Annealing point 13.0 557
Softening point 7.6 736
Transformation temperature in °C 557
Expansion factor α
Coefficient of thermal expansion α (20-300°C) in 10-6 K-1
(static measurement)
7.2


Spectral Transmittance (d=0.15mm)

spectral transmittance

Optical Properties of Schott D263M

Refractive indicies
ne (λ = 546.1nm): 1.5255 ±0.0015
nD (λ = 589.3nm): 1.5230
Above value ve: 55

The light transmittance for a thickness of 0.15 mm is TVD65 in %
(d=0.15mm) = 91.7 ± 0.3%. In the visible range of the spectrum D26 M is
without absorption. The excellent UV absorption properties make D263M
an ideal material for use in fluorescence microscopy.

Thickness* Dimension of Schott D263M

No. 0 = (0.08 - 0.12mm)
No. 1 = (0.13 -0.16mm)
No. 1.5 = (0.16 - 0.19mm)
No. 2 = (0.19 - 0.23mm)

*Not all thicknesses available in all sizes


Chemical Properties of Schott D263M

Hydrolytic resistance: (DIN ISO 719)
Hydrolytic class: HGB 1
Equivalient of alkali (Na2O) per gram of glass grains in µg/g: 20
Acid resistance (DIN 12 116)
Acid class: S 2
Half surface weight loss after 6 hours mg/dm2: 1.4
Alkali resistance: (DIN ISO 695)
Class: A 2
Surface weight loss after 3 hours mg/dm2: 88

Chemical Composition of Schott D263M

SiO2 = 64.1%
B2O3 = 8.4%
Al2O3= 4.2%
Na2O = 6.4%
K2O = 6.9%
MgO -
CaO -
BaO -
ZnO = 5.9%
TiO2 = 4.0%
As2O3 -
Sb2O3 = 0.1%