Composition:

SiO₂>99.95%

Density:

2.203g/cm³

Young’s module

76.5-97Gpa

Tensile strength:

50Mpa

Compressive strength

60-70Mpa

Flexural strength:

70Mpa

Mohs hardness

5.5~6.5

Knoop Hardness:

88-100Mpa

Specific heat capacity (20^oC):

0.213cal/g. ^oC

Thermal conductivity (20^oC):

0.00331cal/cm.s. ^oC

Resistivity (20^oC)

>10¹⁸¦¸.cm

Dielectric constant (0~10⁶Hz, 20^oC)

3.7

Chemical resistance:

Will not be Eroded by acids or alkalis except HF and H₃PO₄ above 300^oC

Optical transmission

JGS1:

High transmission at far UV

JGS2:

High transmission at UV

JGS3:

No OH^-, high transmission at IR