Materials | Borosilicate | Corning® 7059 Barium-Borosilicate Glass

Glass Type: Borosilicate

Description

Corning® 7059 Barium-Borosilicate glass is an almost alkali-free technical flat glass with a good thermal shock resistance. Corning® 7059 Barium-Borosilicate glass has long been the standard of the electronics industry for thin-film circuits, which require special electrical properties. This is important for many electronic applications, because alkali ions are known to lower the performance, reliability, and longevity of thin-film devices.

Thermal Properties			Mechanical Properties
Thermal Coefficient of Expansion	0/300°C): 46.0 X 10 -7/°C	Density	2.23 g/cm3 (at 25 °C/77°F)
Annealing Point	639°C/1182°F	Knoop Hardness	418
Softening Point	844°C/1551°F	Young’s Modulus	6,89 x 103 kg/m m2
Strain Point	539°C/ 1002° F	Poisson’s Ratio	0.20

Thermal Properties

Mechanical Properties

Thermal Coefficient of Expansion

0/300°C): 46.0 X 10 -7/°C

Density

2.23 g/cm3 (at 25 °C/77°F)

Annealing Point

639°C/1182°F

Knoop Hardness

418

Softening Point

844°C/1551°F

Young’s Modulus

6,89 x 103 kg/m m2

Strain Point

539°C/ 1002° F

Poisson’s Ratio

0.20

Chemical Properties			Electrical Properties
Hydrolytic Resistance	N/A	Dielectric Constant	5,84 (20°C/1 MHz)
Acid Resistance	N/A	Resistivity	13.1 X 250°C
Alkali Resistance	N/A	Dielectric Strength	N/A

Chemical Properties

Electrical Properties

Hydrolytic Resistance

N/A

Dielectric Constant

5,84 (20°C/1 MHz)

Acid Resistance

N/A

Resistivity

13.1 X 250°C

Alkali Resistance

N/A

Dielectric Strength

N/A

Optical Properties
Refractive Index	1.33 @ 589.3nm

Optical Properties

Refractive Index

1.33 @ 589.3nm