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SCHOTT 8487 Borosilicate glass is the premier choice for applications such as backlighting, high & low-pressure discharge lamps, flash lamps, exhaust & flare tubing for general lighting, ionization gauges and intermediate sealing glasses

The annual tubing campaign for SCHOTT 8487 borosilicate glass has commenced, orders are still being accepted.

Qualitative Properties

High Resistance to Thermal Shock - Sealing to Tungsten

Quantitative Properties include:

• Coefficient of mean linear thermal expansion
• a (20°C;300°C) acc. to ISO 7991 ......................... 3.9 10-6K-1
• Transformation temperature Tg ................................ 525 °C
• Glass temperature at viscosity h in dPa. s
• 1013 (annealing point)................................ 560 °C
• 107.6 (softening point)................................. 775 °C
• 104 (working point)................................... 1135 °C
• Stress-optical coefficient K .................................... 3.6 10-6mm2 .N-1
• Density r at 25°C ................................................... 2.25 g .cm-3
• Modulus of elasticity E (Young's modulus) .......... 66 103N . mm-2
• Poisson's ratio μ ................................................... 0.2
• Thermal conductivity lw at 90°C ........................... 1.2 W . m-1 . K-1

E mail us via the link on the right to discuss your glass tubing applications and needs, we welcome your inquiries

To download a pdf with in depth specifications and chemical resistance data on 8487 Borosilicate Glass click here