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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 |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | Schott BOROFLOAT® Borosilicate Float Glass.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
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.
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 2.23 g/cc | 0.0806 lb/in³ |
| Mechanical 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 |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 3.25 µm/m-°C @Temperature 20.0 - 300 °C |
1.81 µin/in-°F @Temperature 68.0 - 572 °F |
|
| Specific Heat Capacity | 0.830 J/g-°C @Temperature 20.0 - 100 °C |
0.198 BTU/lb-°F @Temperature 68.0 - 212 °F |
|
| Thermal Conductivity | 1.12 W/m-K @Temperature 90.0 °C |
7.77 BTU-in/hr-ft²-°F @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<sup>7.6</sup> dPa-s |
| Annealing Point | 560 °C | 1040 °F | 10<sup>13</sup> dPa-s |
| Optical Properties | Metric | English | Comments |
|---|---|---|---|
| Refractive Index | 1.463 @Wavelength 1014 nm |
1.463 @Wavelength 1014 nm |
IR Hg |
| 1.472 @Wavelength 588 nm |
1.472 @Wavelength 588 nm |
n<sub>d</sub> | |
| 1.481 @Wavelength 435.8 nm |
1.481 @Wavelength 435.8 nm |
Blue Hg | |
| 1.489 @Wavelength 365 nm |
1.489 @Wavelength 365 nm |
UV Hg | |
| Transmission, Visible | 92 % @Thickness 0.700 mm |
92 % @Thickness 0.0276 in |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Volume Resistivity | 3.10e+6 ohm-cm @Temperature 350 °C |
3.10e+6 ohm-cm @Temperature 662 °F |
|
| 1.00e+8 ohm-cm @Temperature 250 °C |
1.00e+8 ohm-cm @Temperature 482 °F |
||
| Dielectric Constant | 4.6 @Frequency 1e+6 Hz |
4.6 @Frequency 1e+6 Hz |
|
| Dielectric Strength | 16.0 kV/mm | 406 kV/in | 50 Hz |
| Dissipation Factor | 0.0037 @Frequency 1e+6 Hz |
0.0037 @Frequency 1e+6 Hz |
| Descriptive Properties | Value | Comments |
|---|---|---|
| Abbe Value | 65.41 | v<sub>e</sub> |
| Dispersion | 0.00719 | n<sub>F</sub> - n<sub>C</sub> |
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