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Rulon Bearings

Momentive Performance Materials Type 254 Fused Quartz Tubing  (discontinued **)
Categories: Ceramic; Glass; Oxide; Silicon Oxide

Material Notes: A doped quartz material that blocks virtually all UV-B and UV-C radiation. Ideal for lamps requiring maximum visible transmittance with nearly complete UV protection. Including some quartz halogen and metal halide lamps and other UV sources. Softening point 1615°C. Annealing point 1163°C. Strain point 1066°C.

Data provided by GE Quartz.

GE Quartz became a part of Momentive Performance Materials in 2006.

Key Words: Quartz Tubes
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 2.21 g/cc0.0798 lb/in³
Viscosity 1.30e+14 cP
@Temperature 1100 °C
1.30e+14 cP
@Temperature 2010 °F
 
Mechanical PropertiesMetricEnglishComments
Knoop Microhardness 570570kg/mm²
Hardness, Mohs 5.5 - 6.55.5 - 6.5(Type 214)
Modulus of Elasticity 70.0 GPa10200 ksiYoung's Modulus
Compressive Strength 55.0 MPa7980 psidesign compressive strength
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 5.00e+10 ohm-cm
@Temperature 350 °C
5.00e+10 ohm-cm
@Temperature 662 °F
Dielectric Constant 6.0
@Frequency 1e+6 Hz
6.0
@Frequency 1e+6 Hz
 
Thermal PropertiesMetricEnglishComments
CTE, linear  0.400 µm/m-°C
@Temperature 20.0 °C
0.222 µin/in-°F
@Temperature 68.0 °F
 0.450 µm/m-°C
@Temperature 1000 °C
0.250 µin/in-°F
@Temperature 1830 °F
 0.600 µm/m-°C
@Temperature 500 °C
0.333 µin/in-°F
@Temperature 932 °F
 0.700 µm/m-°C
@Temperature 250 °C
0.389 µin/in-°F
@Temperature 482 °F
Specific Heat Capacity 0.690 J/g-°C
@Temperature 0.000 - 50.0 °C
0.165 BTU/lb-°F
@Temperature 32.0 - 122 °F
Thermal Conductivity 1.40 W/m-K9.72 BTU-in/hr-ft²-°F
Softening Point 1615 °C2939 °F
Annealing Point 1163 °C2125 °F
Strain Point 1066 °C1951 °F
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.461.46
Transmission, Visible 92 %
@Thickness 1.00 mm
92 %
@Thickness 0.0394 in
(includes surface reflection losses)
IR Transmittance 93 %
@Wavelength 1000 - 3000 nm,
Thickness 1.00 mm
93 %
@Wavelength 1000 - 3000 nm,
Thickness 0.0394 in
Cutoff is at 5000 nm; (includes surface reflection losses).
UV Transmittance 0.00 %
@Wavelength <=230 nm,
Thickness 1.00 mm
0.00 %
@Wavelength <=230 nm,
Thickness 0.0394 in
Wavelength dependent - cutoff below 230 nm; less than 5% above 230 nm; (includes surface reflection losses)

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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