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Fused Quartz Glass Typical Physical Properties

PROPERTY

ENGLISH & METRIC SYSTEM VALUE

INTERNATIONAL SYSTEM OF UNITS (SI) VALUE

Density

2.2 gm/cm3

2.2 x 103kg/m3

Hardness

5.5 - 6.5 Mohs' Scale 570KHN100

Design Tensile Strength

7,000 psi

4.8 x 107Pa (N/m2)

Design Compressive Strength

Greater than 160,000 psi

Greater than 1.1 x 109Pa

Bulk Modulus

5.3 x 106psi

3.7 x 1010Pa

Rigidity Modulus

4.5 x 106psi

7.2 x 1010Pa

Young's Modulus

10.5 x 106psi

7.2 x 1010Pa

Poisson's Ratio

.17

.17

Coefficient of Thermal Expansion

5.5 x 10-7cm/cm *oC (20oC - 320oC)

5.5 x 10-7m/m *oK  (293oK - 593oK)

Thermal Conductivity (20oC)

3.3 x 10-3gm cal * cm/cm2*oC

1.4 W/m *oK

Specific Heat (20o)

.16gm cal/gm

670 J/kg *oK

Softening Point

1683oC

1956oK

Annealing Point

1215oC

1488oK

Strain Point

1120oC

1393oK

Electrical Resistivity

7(107) ohm ?cm (350oC)

7(107)ohm-m

Dielectric Properties

(20oC and 1 MHz)

(293oK and 1 MHz)

Constant

3.75

3.75

Strength

5 x 107volts/mil

5 x 107V/m

Loss Factor

Less than 4 x 10-4

Less than 4 x 10-4

Dissipation Factor

Less than 1 x 10-4

Less than 1 x 10-4

Index of Refraction

1.4585

1.4585

Constringency (Nu value)Fused Quartz

67.56

67.56

Velocity of Sound-Shear Wave

3.75 x 105cm/sec

3.75 x 103m/s

Velocity of Sound-Compression Wave

5.90 x 105cm/sec

5.90 x 103m/s

Sonic Attenuation

Less than 11 db/m * MHz

Less than 11 db/m * MHz

Permeability Constants

(cm *mm/cm * sec * cm of Hg * 700oC/973oK)

Helium

210 x 10-10

Hydrogen

21 x 10-10

Deuterium

17 x 10-10

 

 

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