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Corning Pyrex® 7740 Borosilicate Glass

Category	Ceramic , Glass , Optical , Oxide , Silicon Oxide
Manufacturer	Corning Incorporated
Trade Name	Pyrex®
Port	Ningbo port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	Corning Pyrex® 7740 Borosilicate Glass.pdf
Price	EMAIL US sales@lookpolymers.com
	Online Service lookpolymers 27660005

Material Notes:

Pyrex® sheet provides unique chemical, thermal, mechanical, and optical properties. Available in thicknesses from 3/32 inches to 2.25 inches. Tempering increases temperature and pressure capability. Available as polished and machined glass wafers for use in the MST/MEMS (Micro Systems Technology/Micro-Electrical-Mechanical Systems) technologies. Also available in as powdered/crushed in mesh sizes 4 through 325 and is used for sealing and other applications.Information provided by Corning Incorporated.

Physical Properties	Metric	English	Comments
Density	2.23 g/cc	0.0806 lb/in³

Mechanical Properties	Metric	English	Comments
Hardness, Knoop	418	418
Modulus of Elasticity	62.75 GPa	9101 ksi
Poissons Ratio	0.20	0.20
Shear Modulus	26.1 GPa	3790 ksi	Calculated

Thermal Properties	Metric	English	Comments
CTE, linear	3.25 µm/m-°C @Temperature 0.000 - 300 °C	1.81 µin/in-°F @Temperature 32.0 - 572 °F
Softening Point	821 °C	1510 °F	10<sup>7.6</sup> Poise
Working Point	1252 °C	2286 °F	10<sup>4</sup> Poise
Annealing Point	560 °C	1040 °F	10<sup>13</sup> Poise
Strain Point	510 °C	950 °F	10<sup>14</sup> Poise

Optical Properties	Metric	English	Comments
Refractive Index	1.474 @Wavelength 589.3 nm	1.474 @Wavelength 589.3 nm

Electrical Properties	Metric	English
Volume Resistivity	1.20e+9 ohm-cm @Temperature 350 °C	1.20e+9 ohm-cm @Temperature 662 °F
	1.60e+11 ohm-cm @Temperature 250 °C	1.60e+11 ohm-cm @Temperature 482 °F
Dielectric Constant	4.1 @Frequency 1e+6 Hz	4.1 @Frequency 1e+6 Hz
Dissipation Factor	0.0050 @Frequency 1e+6 Hz	0.0050 @Frequency 1e+6 Hz

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