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Schott BOROFLOAT® Borosilicate Float Glass

Category Ceramic , Glass , Optical , Oxide , Silicon Oxide
Manufacturer Schott North America
Trade Name BOROFLOAT®
Port Ningbo port, China
Download PDF Schott BOROFLOAT® Borosilicate Float Glass.pdf
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Material Notes:
This is a highly chemically resistant borosilicate glass with a low thermal expansion. BOROFLOAT® replaced TEMPAX®, a drawn flat borosilicate glass for Schott. The high quality resulting from the float glass process opens up new applications for borosilicate flat glass in laboratories, chemical process plants and in the home appliance and lighting industries.BOROFLOAT® flat glass is highly resistant to water; neutral, acidic and saline solutions; as well as to chlorine, bromine, iodine and organic substances. Even over long periods of time and at high temperatures that exceed 100°C, BOROFLOAT® exceeds the chemical resistance of most metals and other materials.Information provided by SCHOTT North America.
Mechanical Properties Metric English Comments
Density 2.23 g/cc
0.0806 lb/in³
Thermal Properties Metric English Comments
Hardness, Knoop 480
480
HK 0.1/20; E DIN/ISO 9385
Modulus of Elasticity 63.0 GPa
9140 ksi
Poissons Ratio 0.20
0.20
Shear Modulus 26.3 GPa
3810 ksi
Calculated
Optical Properties Metric English Comments
CTE, linear 3.25 µm/m-°C
<br>@Temperature 20.0 - 300 °C
 1.81 µin/in-°F
<br>@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.830 J/g-°C
<br>@Temperature 20.0 - 100 °C
 0.198 BTU/lb-°F
<br>@Temperature 68.0 - 212 °F
Thermal Conductivity 1.12 W/m-K
<br>@Temperature 90.0 °C
 7.77 BTU-in/hr-ft²-°F
<br>@Temperature 194 °F
Maximum Service Temperature, Air 450 °C
842 °F
Long Term, depends on temperature gradient
500 °C
932 °F
Short Term, depends on temperature gradient
Transformation Temperature, Tg 530 °C
986 °F
Softening Point 815 °C
1500 °F
10&lt;sup&gt;7.6&lt;/sup&gt; dPa-s
Annealing Point 560 °C
1040 °F
10&lt;sup&gt;13&lt;/sup&gt; dPa-s
Component Elements Properties Metric English Comments
Refractive Index 1.463
<br>@Wavelength 1014 nm
 1.463
<br>@Wavelength 1014 nm
 IR Hg
1.472
<br>@Wavelength 588 nm
 1.472
<br>@Wavelength 588 nm
 n&lt;sub&gt;d&lt;/sub&gt;
1.481
<br>@Wavelength 435.8 nm
 1.481
<br>@Wavelength 435.8 nm
 Blue Hg
1.489
<br>@Wavelength 365 nm
 1.489
<br>@Wavelength 365 nm
 UV Hg
Transmission, Visible 92 %
<br>@Thickness 0.700 mm
 92 %
<br>@Thickness 0.0276 in
Compliance Properties Metric English Comments
Abbe Value 65.41
v&lt;sub&gt;e&lt;/sub&gt;
Dispersion 0.00719
n&lt;sub&gt;F&lt;/sub&gt; - n&lt;sub&gt;C&lt;/sub&gt;
Chemical Resistance Properties Metric English Comments
Volume Resistivity 3.10e+6 ohm-cm
<br>@Temperature 350 °C
 3.10e+6 ohm-cm
<br>@Temperature 662 °F
1.00e+8 ohm-cm
<br>@Temperature 250 °C
 1.00e+8 ohm-cm
<br>@Temperature 482 °F
Dielectric Constant 4.6
<br>@Frequency 1e+6 Hz
 4.6
<br>@Frequency 1e+6 Hz
Dielectric Strength 16.0 kV/mm
406 kV/in
50 Hz
Dissipation Factor 0.0037
<br>@Frequency 1e+6 Hz
 0.0037
<br>@Frequency 1e+6 Hz
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