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Website: http://zcq-quartz.com/2-2-high-purity-fused-quartz-glass-zcq-k-series.html

High purity, excellent mechanical stability, high temperature resistance, outstanding chemical stability, few bubbles, and customizable size make it optimal materials for various reflectors and sight windows.

Type	Bubbles and Inclusions	Optical uniformity		Hydroxyl content	Residual strain	Applications
	The bubble grade is given for every 100 cm³	Optical uniformity		Hydroxyl content	Residual strain
	DIN ISO 10110	Striae	PV value	ppm (μg/g)	nm/cm
ZKTD-K32	1/6x0.3	No striae in functional direction	< 1x10-5	~200	< 10	Heat resistant sight window
ZKTD-K33	1/6x0.1	No striae in functional direction	< 8x10-6	~200	< 10	Laser reflective optical applications, heat resistant sight window

Type	Bubbles and inclusions	Optical uniformity		Hydroxyl content	Residual strain	Applications
	The bubble grade is given for every 100 cm³	Optical uniformity		Hydroxyl content	Residual strain
	DIN ISO 10110	Striae	PV value	nm/cm	nm/cm
ZKTD-K32	1/6x0.3	No striae in functional direction	< 1x10-5	~200	< 10	Heat resistant sight window
ZKTD-K33	1/6x0.1	No striae in functional direction	< 8x10-6	~200	< 10	Laser reflective optical applications, heat resistant sight window

Mechanical Properties

Mechanical Data	ZKTD-K32~33
Density (g/cm³)	2.203
Modulus of Elasticity (MPa)	7.25x104
Poisson's Ratio	0.17
Compressive Strength (MPa)	1150
Tensile Strength (MPa)	50
Bending Strength (MPa)	67
Mohs Hardness	5.5~6.5
Micro Hardness	8000~9000

Refraction Index Dispersion

Abbe constant	ZKTD-K
Vd=(nd – 1)(nF – nC)	67.5±0.6
Dispersion constants (Sellmeier)
B1	4,76523070x10-1
B2	6,27786368x10-1
B3	8,72274404x10-1
C1	1,18369052x10-2
C2	2,84888095x10-3
C3	9,56856012x10-1

Electrical Properties

Dielectric constant (ε)	0-106Hz	3x1010Hz
Dielectric constant (ε)	3.7	3.81
Dielectric strength in kV/cm	20°C	500°C
Dielectric strength in kV/cm	250-400	40-50
Dielectric loss angle (tg δ)	1KHz	1MHz-109Hz	3x1010Hz
Dielectric loss angle (tg δ)	< 5x10-4	< 1x10-4	< 4x10-4
Resistivity in Ω·cm	20°C	100°C	400°C
Resistivity in Ω·cm	1x1018	1x1016	1x1010
Resistivity in Ω·cm	800°C	1000°C	1200°C
Resistivity in Ω·cm	6.3x106	1x106	1.3x105

Transmittance Curve (ZKTD-K33 Thickness: 10mm)

Chemical Composition

Element

Total

ppm

~20.00

~0.20

~1.50

~0.20

~1.30

~0.01

~0.05

~0.02

~1.30

~2.00

~0.40

~0.03

~28.00

Thermal Properties

Thermal characteristics	Softening point	Annealing point	Strain point	Max consecutive working temperature	Max working temperature
ZKTD-K	1680°C	1150°C	1090°C	1000°C	1200°C

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