|
indices
|
data
|
|
SiO2 (wt %)
|
≥99.7
|
|
Volume density(g/cm3)
|
>1.95
|
|
Show porosity (%)
|
7-11
|
|
Compressive strength(Mpa)
|
≥60
|
|
High-temperature anti-flexural strength (Mpa)
|
≥30
|
|
Thermal expansion coefficient (×10-6/°C)
|
<0.6
|
|
Surface roughness Ra(u m)
|
≤1.6
|
|
Diameter tolerance (mm)
|
±0.05
|
|
Radial beat (mm)
|
≤0.10
|
1.Very low thermal expansion coefficient,
2.strong thermal shock stability,