Reference Data

Material Properties – Molded products

    PYROQUARTZ® NITROSIL® PYROSIL® PYRO  220® LD80TM
DENSITY g/cm3 2.20 2.16 2.11 2.20 1.76
HARDNESS kg/mm2 580 560 525 580 N/A
DESIGN TENSILE STRENGTH MPa 48 48 48 48 N/A
DESIGN COMPRESSIVE STRENGTH MPa 1200 1200 1200 1200 N/A
POISSON’S RATIO   0.17 0.17 0.17 0.17 N/A
YOUNG’S MODULUS GPa 72 72 72 72 N/A
BULK MODULUS GPa 37 37 37 37 N/A
RIGIDITY MODULUS GPa 31 31 31 31 N/A
COEFFICIENT OF THERMAL EXPANSION (0-300°C) cm/cm°C 5.5 X 10-7 5.5 X 10-7 5.5 X 10-7 5.5 X 10-7 5.5 X 10-7
THERMAL CONDUCTIVITY W/mK 1.4 1.3 1.2 1.4 0.9
SPECIFIC HEAT J/kg°C 670 670 670 670 670
SOFTENING POINT °C 1650 1680 1630 1680 1680
ANNEALING POINT °C 1170 1190 1150 1170 1190
STRAIN POINT °C 1090 1100 1070 1100 1100
INDEX OF REFRACTION   1.4585 1.4585 1.4585 1.4585 1.4585
DIELECTRIC PROPERTIES
(20°C, 1 MHz) 		           
Constant   3.75 3.75 3.75 3.75 2.98
Strength V/cm 5 X 105 5 X 105 5 X 105 5 X 105 5 X 105
Loss Factor   < 4 X 10-4 < 4 X 10-4 < 4 X 10-4 < 4 X 10-4 < 4 X 10-4
Dissipation Factor   < 1 X 10-4 < 1 X 10-4 < 1 X 10-4 < 1 X 10-4 < 1 X 10-4
RATE OF DISSOLUTION IN HF ACID            
5% HF nm/min 40 45 50 40 N/A
10% HF nm/min 88 93 98 88 N/A
15% HF nm/min 330 340 350 330 N/A

 

Chemistry Specifications

At Pyromatics, maintaining maximum purity is an ongoing effort throughout all phases of the manufacturing process. Pyromatics’ products are known for their consistent high purity and high temperature capabilities.

The high purity of molded quartz provides superior high temperature corrosion resistance and eliminates the chance of wafer contamination.

The typical chemistry1 of Pyromatics’ products is shown below.

TYPICAL ANALYSIS (ppm)

 

Al

Ca

Cu

Fe

Li

Mg

K

Na

Ti

Zr

OH-
Clear fused quartz:

 

 

 

 

 

 

 

 

 

 

 
  PyroQuartz® 12 3 <0.1 0.8 <1 <0.2 <1 0.9 <1.5 <1 <125
  Pyro220™ 12 3 <0.1 0.8 <1 <0.2 <1 0.9 <1.5 <1 50
Opaque fused quartz:

 

 

 

 

 

 

 

 

 

 

 
  NitroSil® 12 3 <0.1 0.8 <1 <0.2 <1 0.9 <1.5 <1 <125
  LD80™ 12 3 <0.1 0.8 <1 <0.2 <1 0.9 <1.5 <1 <125
  PyroSil® <25 <30 <5 <10 <5 <5 <5 <10 <5 <5 <125

1The numbers shown are representative of the chemistry found on the inside surface of the parts.

 


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