Material Characteristics of Fused Silica 

Learn about the material characteristics of JGS1 and JGS2 fused silica, including their optical transmission, thermal stability, UV and infrared performance, and common semiconductor and photonics applications. Compare fused silica grades to determine the best material for your research, optical components, laser systems, or high-temperature processing needs.

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JGS1 & JGS2 Fused Silica Specifications

UniversityWafer supplies JGS1 and JGS2 fused silica wafers, substrates, windows, and custom-fabricated components for research, photonics, semiconductor processing, spectroscopy, and high-temperature applications. Review the material characteristic documents to compare optical transmission, thermal properties, refractive index, and other important specifications before selecting your material.

Whether you need a single prototype or production quantities, we can provide custom diameters, thicknesses, polishing options, and edge profiles to meet your application requirements.

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Understanding Fused Silica and Quartz

Although the terms are often used interchangeably, they describe different materials:

  • Quartz refers to single-crystal quartz (SiO₂).
  • Fused Silica is an amorphous, high-purity silicon dioxide glass produced by melting silica.
  • Fused Quartz is commonly used in industry as another name for fused silica.

If you're unsure whether your application requires JGS1 fused silica, JGS2 fused silica, fused quartz, or single-crystal quartz, our technical team can help identify the most suitable material for your optical, semiconductor, laser, or research application.

JGS1 Fused Silica Material Characteristics

JGS1 fused silica material characteristics and specifications

Fused Silica JGS2 Specifications

Fused silica is a high-purity silicon dioxide glass used for optical, semiconductor, photonics, laboratory, and high-temperature applications. Its low thermal expansion, excellent optical transmission, and strong resistance to thermal shock make it useful for researchers who need reliable glass substrates, windows, wafers, and custom precision components.

JGS1 fused silica is commonly selected for ultraviolet and visible optical applications. It offers strong UV transmission, good chemical stability, and excellent dimensional stability in demanding environments. Researchers use JGS1 fused silica for UV optics, laser windows, spectroscopy, photolithography, and optical research where clarity and transmission performance are important.

JGS2 fused silica is often used for visible and near-infrared applications. It provides dependable optical performance, high thermal resistance, and low expansion compared with many standard glass materials. JGS2 fused silica can be used for optical windows, infrared components, carrier substrates, insulating plates, and precision laboratory parts.

Why Researchers Use Fused Silica

  • High purity silicon dioxide glass for optical and wafer applications
  • Low coefficient of thermal expansion for improved dimensional stability
  • Excellent resistance to thermal shock and high-temperature processing
  • Strong optical transmission for UV, visible, and near-infrared applications
  • Good electrical insulation for semiconductor and MEMS research
  • Available as wafers, windows, plates, and custom diced substrates

Fused Silica vs. Quartz

Fused silica and quartz are sometimes used interchangeably, but they are not the same material. Quartz typically refers to single-crystal quartz, while fused silica refers to amorphous silicon dioxide glass. If a customer requests fused quartz, UniversityWafer can help determine whether fused silica or single-crystal quartz is the correct material for the application.

UniversityWafer supplies fused silica wafers and substrates for optics, MEMS, semiconductor processing, UV transmission, IR research, and high-temperature experiments. Send us your required diameter, thickness, polish, grade, and quantity for a fast quote.

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