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As a world leader in fused quartz, we make numerous products from natural and synthetic raw materials, providing tight control of raw material properties and manufacturing processes to create products that meet our customers' demanding needs. Our quartz products exhibit desirable properties, including extremely high-purity optical transparency over a wide spectral range, chemical inertness, high temperature deformation resistance, ultra-low thermal expansion coefficients and excellent thermal shock resistance.  

Our fused quartz products are used primarily in highly demanding semiconductor, specialty lighting, LED, fiber-optic, and solar and photovoltaic applications. For example, in semiconductor manufacturing, our consistent, pure and high-quality materials enable tight process control and outstanding outcomes for crystal growth and wafer processing operations. For lighting, Momentive's fused quartz withstands the elevated operating temperatures of high-performance lamps. In the solar industry, our products help enable efficient single crystal silicon growth and cell processing to help reduce manufacturing costs.  

We take quality control seriously, closely monitoring and controlling every step in the quartz production process, from raw material purification to final packaging, to ensure purity.  

Learn how our fused quartz products are helping to bring the next generation of innovative products to market.

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Fiber-Optic Quartz Rod

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The strength and purity of Momentive 214 grade quartz rods make them an excellent candidate to consider for fiber-optic applications.  Available from 1mm to 45mm in diameter or even greater, Momentive's fiber-optic quartz rods come in a range to suit your specific needs.

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The combination of ultra-high purity and dimensional control translates into excellent attenuation for optical fiber. Each fiber-optic quartz tube produced by Momentive is serialized, characterized and accompanied by a data slip showing the complete geometry of the tube, demonstrating the outstanding consistency of the product.

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Lamp Tubing

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Fused quartz lamp tubing is available in the following grades:   


  • Specially formulated for high purity
  • Good transmittance and higher temperature resistance
  • Low hydroxyl (-OH) content   


  • Virtually ozone-free (or germicidal) quartz tubing that helps transmit UVA and UVB rays while blocking the deep wavelengths that cause ozone generation in lighting applications
  • An excellent consideration for disinfectant applications and various UV treatments  


  • Lamp tubing that requires maximum visible transmittance with virtually complete UV protection
  • An excellent consideration for applications requiring UVB and UVC radiation blockage   

021 and 022 

  • Ultra-high-purity synthetic fused silica with low hydroxyl content; can exhibit superior solarization resistance and high transmittance in the deep UV range  

Seal Glass

Momentive's seal glass is comprised of quartz rod material used as filler to weld quartz to metal, resulting in a successful welding resistant to thermal cycles. Available grades are GSG-1, GSG-3 and GSG-4 with graded coefficient of thermal expansion.  

Potential applications for Momentive lamp tubing include:  

  • Lighting
  • Water and air purification
  • UV protection
  • Paint and ink curing

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Quartz Crucibles

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Momentive quartz crucibles are offered in a wide variety of compositions, designs and coatings, depending on each customer's needs and applications. Crucibles meet the stringent purity requirements of each customer's industry and are designed to address specific micro-contamination concerns as well as growth-process requirements related to yield, attempt throughput and lifetime for optimized cost of ownership.

Potential applications for Momentive quartz crucibles include:  

  • Semiconductor ingot growth
  • High-end solar monosilicon ingot growth

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Momentive semiconductor quartz rods can provide a dimensional consistency among a broad range of diameters and may also offer low alkali/low aluminum characteristics. 

The following grades are available from Momentive for semiconductor quartz rod: 


  • High-purity quartz rod with diameter range of 1 mm to >45 mm
  • Superior performance at elevated temperatures


  • Low alkali/low aluminum quartz rod

 Potential applications for Momentive semiconductor quartz rods include: 

  • Wafer carriers

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Semiconductor quartz tubing is available from Momentive in a wide range of diameters and wall thicknesses. The low -OH (hydroxyl) content allows Momentive's semiconductor quartz tubing to withstand the wide thermal gradients and chemical environments common in semiconductor manufacturing.  

The following grades are available for semiconductor tubing:   

214, 214SC and 214LD

  • Small and direct-drawn or resized large diameter industry standard 214 tubing
  • Superior performance at elevated temperatures  

224 and 224LD

  • Low alkali quartz tubing for applications with higher purity requirements   

244 and 244LD

  • Low alkali/low aluminum quartz tubing  

Potential applications:

  • Semiconductor wafer processing
  • Solar wafer processing

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Quartz Ingots

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To meet a variety of specifications, Momentive quartz ingots are available in the following grades:

124 ingot

  • High-purity fused quartz as the semiconductor industry's material of choice
  • Low hydroxyl content for high temperature applications
  • Large ingot size to provide fabrication flexibility

144 ingot

  • Low alkali, low aluminum quartz ingot

012 ingot

  • Ultra-high-purity synthetic fused silica
  • Low hydroxyl level

i21 ingot

  • Near-defect-free quality with ultra-low bubble content
  • Near net shape
  • Homogeneous quality throughout ingot
  • Low hydroxyl level

Potential applications for Momentive quartz ingots include:

  • Semiconductor manufacturing
  • Solar wafer processing
  • LED wafer processing

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Good quality product

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