Quartz plates

SIO2 :

99.997%

Density :

2.2(g/cm3)

Degree of hardness moh' scale :

6.6

Melting point:

1732°C

Working temperature :

1200°C

Max temperature can reach in a short time :

1450°C

Acid tolerance:

30 times than Ceramics , 150 times than Stainless steel

Visible light transmittance :

above 93%

UV spectral region transmittance:

80%

Resistance value :

10000 times than ordinary glass

Annealing point:

1300°C

softening point:

1630°C

Strain point:

1200°C

Parameter

Standard Grade

Precision Grade

Ultra-precision Grade

Dimensional Tolerance

+/-0.1

+/-0.1

+/-0.1

Clear Aperture

>80% to >90%

>80% to >90%

>80% to >90%

Surface Quality

60-40

40-20

20-10 to 10-5

Parallelism

1arc min

30arc second

1arc min

Wavefront Distortion

1λper 25 mm

λ/4

λ/10

Protective Bevel

<0.25×45 deg

<0.25×45 deg

<0.25×45 deg

Coating

Optional

Optional

Optional

Dimension

Depend on material

Thickness

Depend on material