 |
Momentive Performance Materials is the world's leading producer of fused quartz for lighting applications. Four basic types of lamp grade quartz are available, each designed to fulfill specific performance requirements. Together, these materials cover a wide variety of applications. They include:
|
|
GE 214
The worldwide standard for clear fused quartz lamp tubing. GE 214 is a high purity, high transmittance, high temperature material with a low hydroxyl (OH)- content. It is suitable for a broad range of mercury, halogen and other quartz lamp applications.
|
|
Description
|
Typical Application
|
|
The industry standard clear fused quartz material. Economical and available in a full range of sizes. Excellent visual, thermal, and mechanical properties with low hydroxyl content and tight dimensional tolerances.
|
High performance and high temperature lamps such as mercury and quartz halogen, ultraviolet(UV) lamps, thermocouples, semiconductor quartzware, waveguide handles, and other high temperature products.
|
|
GE 219
Known as "Ozone-Free" or "Germicidal" quartz tubing. GE 219 transmits UV-A and UV-B while blocking the deep, high energy wavelengths that cause ozone generation and pose the greatest exposure risks. GE 219 transmits the 253.7 nanometer mercury emission very efficiently, making it an ideal material for disinfection applications and various other UV treatments.
|
|
Description
|
Typical Application
|
|
Clear fused quartz tubing doped with titanium oxide to block deep UV radiation. Visual and dimensional characteristics are identical to GE 214, while thermal and mechanical properties are similar. Commonly called "germicidal" or "ozone-free" quartz.
|
Anti-bacterial and other lamps where UV transmittance in the germicidal range is required, but where deeper UV radiation or ozone generation is undesirable.
|
|
GE 254
A doped quartz material that blocks most UV-B and UV-C radiation. GE 254 has a transmittance cutoff wavelength between 350 and 400 nanometers. It is ideal for lamps requiring maximum visible transmittance with nearly complete UV protection. Applications for GE 254 are those where UV exposure to people or property is undesirable, including some quartz halogen and metal halide lamps and other UV sources.
|
|
Description
|
Typical Application
|
|
UV blocking cerium doped clear fused quartz which absorbs essentially all UV-B and UV-C radiation while maintaining transmittance efficiency in the visible spectrum range.
|
UV-sensitive high temperature applications including halogen and discharge lamps where UV radiation would create personal or material exposure risks. Eliminates need for coatings, filters, and lenses for UV blocking.
|
|
GE 021Al
This is a dry synthetic fused silica material providing high transmittance in the deep ultraviolet range. It combines the advantages of low hydroxyl content with ultra high purity to yield superior UV transmittance and resistance to solarization for a variety of UV lamp applications including water purification, ozone generation, paint and ink curing, and chemical processing.
|
|
Description
|
Typical Application
|
|
Clear synthetic fused silica with high UV transmittance and ultra high purity. Provides maximum transparency to deep UV and resistance to solarization. Low hydroxyl content plus excellent visual, thermal, mechanical, and dimensional properties.
|
Envelopes and sleeve tubing for UV and ozone producing lamps; curing, chemical processing and germicidal lamps; and the most advanced semiconductor applications. Also solarization sensative applications.
|
|
GE 214A, 219A, 254A
These are identical to the standard types but are produced with a lower hydroxyl content. "A" products contain <1ppm (OH)- and are intended for metal halide lamps and other applications where the quartz must be devoid of hydroxyl as well as all dissolved gases.
|
|
Description
|
Typical Application
|
|
Identical to the standard varieties but with hydroxyl and other dissolved gas content essentially eliminated.
|
Metal halide lamp envelopes and other applications requiring hydroxyl-free material.
|
|
Type graded sealing cane is designed specifically for making reliable metal-to-quartz seals. It's available in four grades, each with a unique coefficient of expansion and other precisely defined properties.
|
|
Back to Products
|
Momentive Performance Materials
