SiO2 content:

99.9 %

Density:

around 2.2 (g/cm3)

Degree of hardness moh' scale:

6.6

Melting point:

1732°C

Working temperature:

1100°C

Ma temperature can reach in a short time:

1450°C

Acid tolerance:

30 times higher than Ceramics, 150 times higher than stainless steel

Visible light transmittance:

> 93%

UV spectral region transmittance:

80%

Resistance value:

10000 times high than ordinary glass

Annealing point:

1180°C

Softening point:

1630°C

Strain point:

1100