Dynasil IRQ Fused Quartz

IRQ Grade Fused quartz is a refined natural quartz crystal flame fused. IRQ Grade Fused Quartz has a low level of inclusions and/or bubbles and is used for windows and plano lens, concave and convex lens, meniscus lens, beam splitters, recticles, prisms, cubes and other polished parts.

Glass Code: Dynasil^®		IRQ
Type		Fused Quartz
Color		Clear
Principal Use		Optics
Thermal Expansion 10^-5cm/cm/°C		5
Viscosity Data Data subject to normal manufacturing variations	Strain point °C.	1080
	Annealing point °C.	1200
	Softening point °C.	1730
Density g/cm³		2.2
Hardness (Mohs Scale)		72
Tensile Strength (MPa)		50
Compressive Strength (Mpa)		1100
Bending Strength (Mpa)		65
Torison Strength (Mpa)		30
Young's Modulus (GPa)		72
Poisson's Coefficient		.16
Resistivity: ohm	@ 20^ºC	1 x 10²⁰
	@ 800^ºC	6 x 10⁸
	@ 1000^ºC	1 x 10⁸
Dielectric Properties (1 MHz 20°C)	Dielectric constant	3.78
	Loss factor	1 x 10⁴
Refractive index @ 587.56nm		1.458