Items

Unit

Index

Typical

Chemical

composition

SiO₂

%

99.90 min

99.95%

Al

ppm

20 max

15

Fe

ppm

1.5 max

1.0

K

ppm

3 max

2.5

Specific gravity

g/cm³

2.2

Tensile strength

kg/cm²

70

Compression Strength

kg/cm²

20x10³

Flexuosity

%

±0.2

Coefficient of expansion due to heat (°C)

---

0.5x10^-6/°C

Softing Point

℃

1730

Mohs hardness

---

6.5 min

Size

Inside Diameter

mm

0.5-100

Outside Diameter

mm

1.5-110

Wall Thickness

mm

0.5-10

Tolerance

mm

2--1000

Application:  Quartz iodine lamp tube, lighting, semiconductor industry and UV.