Machinable Quartz

Final Advanced Materials provides a range of quartz glass parts : rods, tubes, boards, machined parts according to your drawings... We can machine quartz part and also a full range of technical machinable ceramics.

The electrical fusion process uses resistance heating to melt highly refined quartz sand into semi finished quartz glass products.

Electrically fused Quartz Glass characteristics

High purity level
Low bubble content
High homogeneity
Excellent thermal shock resistance
High visible and IR transmission
Very good thermal insulation
Maximum temperature 1300°C (1100°c continuously)

Fused Quartz Glass applications

Furnace tubes
Longboats
Baffles
Laser drilled injectors
Spare parts for loading systems
TC-sheaths
Optical windows
Combustion tubes for analyzers
Laboratory glassware
3D measurement

Quartz plates dimensions

500 x 500 mm
Thickness from 1 to 10 mm
Max. plates size 1000 x 800 x 100 mm

Quartz discs dimensions

Ø till 500 mm
Thickness 1 to 10 mm
Max. discs size Ø 1000 x 100 mm

Quartz tubes dimensions

Thickness 1 to 10 mm
Ø outer from 5 to 300 mm
Wall thickness from 0.6 to 6 mm
Max. curvature 3%

Technical data

Properties

Units

Electrically fused quartz

Reference

PPM (mass)

Al=15 - Ca=0.5 - Cu<0.05 - Cr<0.05 - Fe=0.1 - K=0.4 - Li=0,6 - Mg=0.05 - Mn<0.05 - Na=0.3 - Ti=1.1 - Zr=0.7

Mechanical characteristics at 20°C

Density

g/cm³

2.2

Hardness

Mohs

5.5 - 6.5

Elasticity module at 20°C

N/mm²

7.25 x 10⁴

Torsion module

N/mm²

3 x 10⁴

Poisson's ratio

0,17

Compressive Strength

N/mm²

1150

Tensile Strength

N/mm²

Flexual Strength

N/mm²

Torsion Strength

N/mm²

Sound propagation speed

m / s

5720

Thermal characteristics

Softening Temperature

°C

1710

Annealing Temperature

°C

1125

Continuous use Temperature

°C

1160

Peak Temperature

°C

1300

Specific Heat

J/kgK (0 - 100 °C)

J/kgK (0 - 500 °C)

J/kgK (0 - 900 °C)

772

964

1052

Thermal Conductivity

W/mK (20°C)

W/mK (100°C)

W/mK (200°C)

W/mK (400°C)

W/mK (950°C)

1.38

1.47

1.55

1.84

2.68

Thermal Expansion

10^-7/°K (0-100°C)

10^-7/°K (0-600°C)

10^-7/°K (0-900°C)

10^-7/°K (-50-0°C)

5.1

5.4

4.8

2.7

Electrical characteristics

Dielectric Strength

Ω.cm (20°C)

Ω.cm (400°C)

Ω.cm (800°C)

Ω.cm (1200°C)

10¹⁸

10¹⁰

6.3 x 10⁶

1.3 x 10⁵

Dielectric Capacity

kV/mm (20°C)

kV/mm (50°C)

25 – 40

4 - 5

Dielectric Loss Angle

tg δ (1 kHz)

tg δ (1 MHz)

tg δ (3x1010 Hz)

5 x 10^-4

1 x 10^-4

4 x 10^-4

Dielectric Constant

ε (0 – 106 Hz)

ε (9x108 Hz)

ε (3x1010 Hz)

3.7

3.77

3.81

Attachments