Molded Fused Quartz Products Material Properties

   

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
  PyroQuartz SM-77 12 0.8 <0.1 0.6 <1 <0.2 <1 0.8 <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
  NitroSil SM-77 12 0.8 <0.1 0.6 <1 <0.2 <1 0.8 <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.

 

Copyright © 2011, Pyromatics Corp.
9321 Pineneedle Drive Mentor, Ohio 44060 (440) 352-3500