Quartz Tubing Quartz Rod and Wool Quartz Polished Discs - Natural Quartz Polished Discs - Synthetic Quartz Discs - Sintered Quartz Spherical Joints - Balls and Cups Quartz Conical Joints - Cones Quartz Conical Joints - Sockets Quartz Screwthreads and Stopcocks Quartz Graded Seals Quartz Round Bottom Flasks Quartz Flat Bottom Flasks Quartz Conical Flasks Quartz Wide and Tall Form Beakers

Technical Data

Clear fused quartz glass is a unique material with an unrivalled combination of purity, high temperature resistance, thermal shock resistance, high electrical insulation, optical transparency and chemical inertness.

Mechanical

Density	2.20 x 10³	Kg/m³
Youngs Modulus	74 x 10⁶	KN/m²
Rigidity Modulus	32 x 10⁶	KN/m²
Compresive Strength	20 x 10⁶	KN/m²
Tensile Strength	70 x 10³	KN/m²
Shear Strength	70 x 10³	KN/m²
Moh’s Hardness	6

Electrical

Electrical Resistivity	2 x 10¹⁹ ohm cm at 20°C 2 x 10⁶ ohm cm at 800°C
Dielectric Strength	10KV/mm at 20°C 2.5KV/mm at 500°C

Thermal

Strain Point	1385°K
Annealing Point	1455°K
Softening Point	1853°K
Coefficient of Expansion	0.52 x 10^-6 per °C
Continuous Operating Temp.	>1000°C

Optical

Useful Optical Range	Synthetic 180 - 2000nm Natural 275 - 2000nm
Refractive Index	n_D (589 nm) - 1.458

Chemical

SiO₂ Content	99.995%
Total Metallic Impurities	10ppm (Typical)
Chemical Inertness: Fused quartz does not react with acids with the exception of hydrofluoric and at high temperatures phosphoric. There is a slow reaction with caustic alkalies at normal temperatures. There is no reaction with water and steam at moderate temperatures and pressures. More detailed information such as transmission curves and chemical impurity levels are available on request.