Materials | Borosilicate | SCHOTT Borofloat(R) Glass

Glass Type: Borosilicate

Description

SCHOTT Borofloat(R) glass is a highly chemical resistant borosilicate glass with low thermal expansion that is produced using a float process. Other key properties of Borofloat(R) glass include an average 80/50 scratch/dig surface quality, high thermal resistance and excellent transmission. Borofloat(R) can be used as a substitute for Corning(R) Pyrex(R) in most cases. The materials differ slightly in chemical composition. CGQPI can CNC mill, drill, cut, lap, and polish Borofloat(R) to any dimension, shape or surface finish.

Thermal Properties			Mechanical Properties
Thermal Coefficient of Expansion	(0/300°C): 32.5 X 10 -7/°C	Density	2.23 g/cm3 (at 25 °C/77°F)
Annealing Point	560°C / 1040° F	Knoop Hardness	HK0.1/20:480
Softening Point	815°C / 1508°F	Young’s Modulus	N/A
Strain Point	N/A	Poisson’s Ratio	0.20

Thermal Properties

Mechanical Properties

Thermal Coefficient of Expansion

(0/300°C): 32.5 X 10 -7/°C

Density

2.23 g/cm3 (at 25 °C/77°F)

Annealing Point

560°C / 1040° F

Knoop Hardness

HK0.1/20:480

Softening Point

815°C / 1508°F

Young’s Modulus

N/A

Strain Point

N/A

Poisson’s Ratio

0.20

Chemical Properties			Electrical Properties
Hydrolytic Resistance	class 1	Dielectric Constant	E=4.6 @/MHz &25°C
Acid Resistance	class 1	Resistivity	8.0 X 250°C; 6.5 @ 350°C
Alkali Resistance	class 2	Dielectric Strength	16 KV/mm @50 Hz & 25°C

Chemical Properties

Electrical Properties

Hydrolytic Resistance

class 1

Dielectric Constant

E=4.6 @/MHz &25°C

Acid Resistance

class 1

Resistivity

8.0 X 250°C; 6.5 @ 350°C

Alkali Resistance

class 2

Dielectric Strength

16 KV/mm @50 Hz & 25°C

Optical Properties
Refractive Index	1.472

Optical Properties

Refractive Index

1.472