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Schott Glass 8651 Sealing 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
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Material Notes:
Tungsten sealing glass Power diodesInformation provided by SCHOTT AG.
Physical Properties Metric English Comments
Density 2.91 g/cc

@Temperature 25.0 °C
0.105 lb/in³

@Temperature 77.0 °F
Mechanical Properties Metric English Comments
Modulus of Elasticity 59.0 GPa
8560 ksi
Poissons Ratio 0.24
0.24
Thermal Properties Metric English Comments
CTE, linear 4.40 µm/m-°C

@Temperature 20.0 - 300 °C
2.44 µin/in-°F

@Temperature 68.0 - 572 °F
ISO 7991
Thermal Conductivity 0.900 W/m-K

@Temperature 90.0 °C
6.25 BTU-in/hr-ft²-°F

@Temperature 194 °F
Transformation Temperature, Tg 549 °C
1020 °F
ISO 7884-8
Softening Point 736 °C
1360 °F
Viscosity 10<sup>7.6</sup> dPa s; ISO 7884-3
Working Point 1034 °C
1893 °F
Viscosity 10<sup>4</sup> dPa s; ISO 7884-2
Annealing Point 540 °C
1000 °F
Viscosity 10<sup>13</sup> dPa s; ISO 7884-4
Optical Properties Metric English Comments
Refractive Index 1.552

@Wavelength 587.6 nm
1.552

@Wavelength 587.6 nm
Electrical Properties Metric English Comments
Volume Resistivity 1.00e+10 ohm-cm

@Temperature 350 °C
1.00e+10 ohm-cm

@Temperature 662 °F
1.60e+11 ohm-cm

@Temperature 250 °C
1.60e+11 ohm-cm

@Temperature 482 °F
Dielectric Constant 6.0

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
6.0

@Frequency 1.00e+6 Hz,
Temperature 77.0 °F
Dielectric Loss Index 0.0031

@Frequency 1.00e+6 Hz,
Temperature 25.0 °C
0.0031

@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 1
ISO 719
Stress-optical Coefficient K (10-6mm2N-1) 3.6
DIN 52314
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