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Schott Glass 8245 Borosilicate Glass
| Category | Ceramic , Glass |
| Manufacturer | Schott North America |
| Trade Name | |
| Port | Ningbo port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | Schott Glass 8245 Borosilicate Glass.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
Borosilicate glass for sealing to Kovar metal and molybdenum, minimum X-ray absorption, low self radiation, good insulator X-ray tubes, video-frequency tubes, photomultiplier tubes The heavy metal content for the elements lead, mercury, cadmium, and hexavalent chromium is below 100 ppmInformation provided by SCHOTT AG.
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 2.31 g/cc @Temperature 25.0 °C |
0.0835 lb/in³ @Temperature 77.0 °F |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Modulus of Elasticity | 68.0 GPa | 9860 ksi | |
| Poissons Ratio | 0.22 | 0.22 |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 5.10 µm/m-°C @Temperature 20.0 - 300 °C |
2.83 µin/in-°F @Temperature 68.0 - 572 °F |
ISO 7991 |
| Thermal Conductivity | 1.20 W/m-K @Temperature 90.0 °C |
8.33 BTU-in/hr-ft²-°F @Temperature 194 °F |
|
| Transformation Temperature, Tg | 505 °C | 941 °F | ISO 7884-8 |
| Softening Point | 720 °C | 1330 °F | Viscosity 10<sup>7.6</sup> dPa s; ISO 7884-3 |
| Working Point | 1040 °C | 1900 °F | Viscosity 10<sup>4</sup> dPa s; ISO 7884-2 |
| Annealing Point | 515 °C | 959 °F | Viscosity 10<sup>13</sup> dPa s; ISO 7884-4 |
| Optical Properties | Metric | English | Comments |
|---|---|---|---|
| Refractive Index | 1.488 @Wavelength 587.6 nm |
1.488 @Wavelength 587.6 nm |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Volume Resistivity | 790000 ohm-cm @Temperature 350 °C |
790000 ohm-cm @Temperature 662 °F |
|
| 2.50e+7 ohm-cm @Temperature 250 °C |
2.50e+7 ohm-cm @Temperature 482 °F |
||
| Dielectric Constant | 5.7 @Frequency 1.00e+6 Hz, Temperature 25.0 °C |
5.7 @Frequency 1.00e+6 Hz, Temperature 77.0 °F |
|
| Dielectric Loss Index | 0.0080 @Frequency 1.00e+6 Hz, Temperature 25.0 °C |
0.0080 @Frequency 1.00e+6 Hz, Temperature 77.0 °F |
| Chemical Properties | Metric | English | Comments |
|---|---|---|---|
| Acid Class, SR | 4 | 4 | DIN 12116 |
| Alkali Class, AR | 3 | 3 | ISO 695 |
| Descriptive Properties | Value | Comments |
|---|---|---|
| Hydrolytic Resistance | Class HGB 3 | ISO 719 |
| Stress-optical Coefficient K (10-6mm2N-1) | 3.8 | DIN 52314 |
| tk100(°C) | 215 |
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