JGS1

Basic Properties

Density

2.20g/cm^3

Homogeneity

1-2

Bubble Class

0

Optical Properties

Application Wavelength range

180-2500nm, Average Transmission 90%

Abbe Constant

67.6

Refractive Index (Measure at 588nm)

1.4586

Fluorescence

1

Radiation Performance

No Discoloration

Mechanical Properties

Designed Compressive strength

1100Mpa

Design Tensile Strength

48Mpa (7000 psi)

Designed Bending strength

67Mpa

Bulk Modulus

>1100MPa (160,000 psi)

Rigidity Modulus

31000MPa (4.5x10^6 psi)

Young's Modulus

72000Mpa

Poisson's Ratio

0.17

Moh’s Hardness

5.5 - 6.5

Thermal and Electrical Properties

Thermal Expansion Coefficient

5.5x10^-7 cm/cm.°C @20°C-320°C

Thermal Conductivity

1.4 W/m.°C

Specific Heat

670 J/kg.°C

Softening Point

1683°C

Annealing Point

1215°C

Strain Point

1120°C

Electrical Receptivity

7x10^7 ohm.cm (350°C)

Dielectric Properties (20°C and 1 MHz)

Constant

3.75

Strength

5x10^7 V/m

Loss Factor

<4x10^-4

Dissipation Factor

<1x10^-4

Velocity of Sound-Shear Wave

3.75x10^3 m/s

Sonic Attenuation

<11 db/m MHz

Chemical Properties

Chemical Stability

Highly Resistant to Water and all acids except Hydrofluoric

Refractive Index

Wavelength (um)

Refractive Index (n)

 Wavelength (um)

 Refractive Index (n)

0.200

1.55051

1.000

1.45042

0.220

1.52845

1.100

1.44920

0.250

1.50745

1.200

1.44805

0.300

1.48779

1.300

1.44692

0.320

1.48274

1.500

1.44462

0.360

1.47529

1.600

1.44342

0.400

1.47012

1.700

1.44217

0.450

1.46557

1.800

1.44087

0.488

1.46302

1.900

1.43951