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Schott Glass 8252 Alkaline Earth Aluminosilicate Glass
| Category | Ceramic , Glass |
| Manufacturer | Schott North America |
| Trade Name | |
| Port | Shanghai port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | Schott Glass 8252 Alkaline Earth Aluminosilicate Glass.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
Alkaline earth aluminosilicate glass for high temperature applications in electrical engineering, for sealing to molybdenum, free from alkali Bulb and exhaust tube for halogen lamps for automotive, household and general lighting The heavy metal content for the elements lead, cadmium, mercury, and hexavalent chromium is below 100 ppmInformation provided by SCHOTT AG.
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Density | 2.63 g/cc @Temperature 25.0 °C |
0.0950 lb/in³ @Temperature 77.0 °F |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Modulus of Elasticity | 81.0 GPa | 11700 ksi | |
| Poissons Ratio | 0.24 | 0.24 | |
| Shear Modulus | 32.7 GPa | 4740 ksi | Calculated |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 4.60 µm/m-°C @Temperature 20.0 - 300 °C |
2.56 µin/in-°F @Temperature 68.0 - 572 °F |
ISO 7991 |
| Thermal Conductivity | 1.10 W/m-K @Temperature 90.0 °C |
7.63 BTU-in/hr-ft²-°F @Temperature 194 °F |
|
| Transformation Temperature, Tg | 720 °C | 1330 °F | ISO 7884-8 |
| Softening Point | 935 °C | 1720 °F | Viscosity 10<sup>7.6</sup> dPa s; ISO 7884-3 |
| Working Point | 1240 °C | 2260 °F | Viscosity 10<sup>4</sup> dPa s; ISO 7884-2 |
| Annealing Point | 725 °C | 1340 °F | Viscosity 10<sup>13</sup> dPa s; ISO 7884-4 |
| Strain Point | 670 °C | 1240 °F | Viscosity 10<sup>14.5</sup> dPa s; ISO 7884-7 |
| Optical Properties | Metric | English | Comments |
|---|---|---|---|
| Refractive Index | 1.538 @Wavelength 587.6 nm |
1.538 @Wavelength 587.6 nm |
|
| UV Transmittance | <= 58 % @Thickness 1.00 mm, Wavelength 330 nm |
<= 58 % @Thickness 0.0394 in, Wavelength 330 nm |
| Component Elements Properties | Metric | English | Comments |
|---|---|---|---|
| Alkalis | <= 0.030 % | <= 0.030 % | Total Alkali Oxide |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Volume Resistivity | 1.00e+12 ohm-cm @Temperature 350 °C |
1.00e+12 ohm-cm @Temperature 662 °F |
|
| Dielectric Constant | 6.1 @Frequency 1.00e+6 Hz, Temperature 25.0 °C |
6.1 @Frequency 1.00e+6 Hz, Temperature 77.0 °F |
|
| Dielectric Loss Index | 0.0011 @Frequency 1.00e+6 Hz, Temperature 25.0 °C |
0.0011 @Frequency 1.00e+6 Hz, Temperature 77.0 °F |
| Chemical Properties | Metric | English | Comments |
|---|---|---|---|
| Acid Class, SR | 3 | 3 | DIN 12116 |
| Alkali Class, AR | 2 | 2 | ISO 695 |
| Descriptive Properties | Value | Comments |
|---|---|---|
| Hydrolytic Resistance | Class HGB 1 | ISO 719 |
| Stress-optical Coefficient K (10-6mm2N-1) | 2.8 | DIN 52314 |
| tk100(°C) | 660 | DIN 52326 |
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