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General Barium Dense Flint Glass

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Description

Flint glasses are optical glasses with a relatively high refractive index in combination with a low Abbe number and, therfore, a high dispersion.

Properties

General

Density ρ

3.1 - 3.6 g/cm³ at 20 °C

Mechanical

Elastic modulus E

80 - 110 GPa at 20 °C

Hardness, Knoop, HK2 HK2

500 - 650 [-] at 20 °C

Poisson's ratio ν

0.25 - 0.27 [-] at 20 °C

Shear modulus G

34000 - 39000 GPa at 20 °C

Optical

Abbe number νd

35.87 - 42.5 [-]

Refractive index nd

1.6 - 1.72 [-]

Thermal

Coefficient of thermal expansion α

8.1E-6 - 1.02E-5 1/K at 300 °C

from 100 to 300°C

Glass transition temperature Tg

500 - 620 °C

Specific heat capacity cp

0.58 - 0.66 J/(kg·K) at 20 °C

Thermal conductivity λ

0.26 - 1.06 W/(m·K) at 20 °C