Comparing Quartz Tube Materials: GE214, JGS1, JGS2, and JGS3 in Optical Fiber Production

October 24, 2025
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Quartz tubes are essential components in modern industrial and scientific applications, particularly in optical fiber manufacturing, high-temperature furnaces, and thermocouple protection. Understanding the differences between quartz grades like GE214, JGS1, JGS2, and JGS3 is crucial for ensuring performance, purity, and reliability in high-precision environments.

The Role of Quartz Tubes in Optical Fiber and Industrial Applications

Quartz tubes are valued for their exceptional thermal stability, chemical inertness, and optical clarity, making them indispensable in industries like telecommunications, semiconductors, and laboratory research.
Before diving into specific material grades, it’s important to understand how quartz tubing impacts production processes across various industries.

Quartz Tubes in Optical Fiber Manufacturing

In optical fiber production, maintaining ultra-high purity is non-negotiable. Quartz tubes serve as reaction chambers where silica-based preforms are fabricated using vapor deposition methods such as MCVD, OVD, or VAD. These processes demand materials that can withstand temperatures above 1,800°C while maintaining dimensional stability and minimizing contamination — a standard easily met by GE214 and JGS1 quartz.

Quartz Tubes in Furnaces and Thermocouples

For high-temperature furnaces, quartz tube furnaces in the USA are often equipped with high-purity fused silica tubes that offer excellent resistance to thermal shock and chemical degradation. Similarly, quartz thermocouple tubes protect sensitive sensors from reactive gases and molten metals, ensuring accurate and reliable temperature measurements in industrial settings.

Read also: Quartz Tubes: Properties, Uses, and Maintenance Tips

Comparing Quartz Tube Grades: GE214 vs JGS1 vs JGS2 vs JGS3

Each quartz grade offers distinct characteristics suited to specific applications. The choice depends on purity requirements, optical properties, and environmental conditions.

GE214 Quartz (Fused Silica Quartz)

GE214 is one of the highest-purity quartz materials available, manufactured by General Electric. It’s a synthetic fused silica produced using flame hydrolysis of silicon tetrachloride (SiCl₄), resulting in near-zero impurities and exceptional UV transmission.

Key Features:

  • High UV and IR transparency
  • Very low hydroxyl (OH) content
  • Excellent dimensional stability at extreme temperatures
  • Superior resistance to devitrification
  • Ideal for semiconductor, fiber optics, and laboratory furnace applications

Applications:

  • Preform fabrication in optical fiber production
  • Semiconductor wafer processing
  • UV optics and photolithography
  • High-temperature process tubes

JGS1 Quartz (Synthetic Fused Silica)

JGS1 quartz is a synthetic fused silica glass similar to GE214 but made using plasma flame hydrolysis. It’s known for its high UV transmission and excellent purity, making it suitable for applications requiring minimal optical absorption.

Key Features:

  • Transmission range: 185–2500 nm
  • High resistance to solarization and UV degradation
  • Exceptional homogeneity and low bubble content
  • Outstanding chemical resistance

Applications:

  • Optical fiber cladding and preforms
  • UV optics and laser systems
  • High-pressure quartz tube applications in photochemical reactors

JGS2 Quartz (Natural Fused Quartz)

JGS2 is a natural fused quartz material produced by melting natural quartz crystals. While it offers good thermal and mechanical properties, it has higher impurity levels than synthetic grades, slightly affecting optical transmission in the UV range.

Key Features:

  • Transmission range: 220–2500 nm
  • Higher OH content compared to JGS1
  • Good thermal stability and chemical inertness
  • Cost-effective for general industrial applications

Applications:

  • Quartz tube furnaces operating below 1200°C
  • Quartz thermocouple tubes and protective sheaths
  • High-temperature viewports and industrial lamps

JGS3 Quartz (Infrared-Grade Fused Quartz)

JGS3 is designed for infrared and visible light applications where UV transparency is not essential. It provides stable IR transmission and high-temperature performance at an economical cost.

Key Features:

  • Transmission range: 260–3500 nm
  • Excellent thermal shock resistance
  • Suitable for infrared heating systems and furnace windows
  • More affordable than JGS1 or GE214

Applications:

  • Quartz glass tubing in USA for IR heating systems
  • Quartz tube furnace viewports
  • General optical and industrial components

Read also: Powering the Future of Connectivity: Quartz Tubes in Optical Fiber Cable Manufacturing

How to Choose the Right Quartz Tube for Your Application

Selecting the right quartz tubing in the USA involves evaluating key performance factors:

  1. Temperature Range

If your process involves high-temperature operations (long term use up to 1100°C), choose GE214 or JGS1 quartz tubes for maximum durability and minimal distortion.

  1. Optical Requirements

For UV-transparent applications, GE214 and JGS1 are preferred. If your process involves infrared or visible light, JGS3 quartz is ideal due to its extended IR transmission range.

  1. Cost and Availability

If your project has budget constraints, JGS2 quartz tubing for sale provides a good balance between performance and affordability without compromising structural integrity.

  1. Chemical Resistance

For use in acidic or reactive environments, synthetic fused silica (GE214 or JGS1) provides superior resistance to contamination and corrosion.

Where to Buy High-Quality Quartz Tubes in the USA

When sourcing quartz tubes in the USA, ensure your supplier provides:

  • Certified purity levels
  • Consistent wall thickness and dimensional tolerances
  • Custom quartz tube sizes for specialized setups
  • Options for high-pressure quartz tubes and high-temperature furnace tubes

M-Kube Enterprise LLC offers a wide range of Quartz Glass Tubing in the USA, including GE214, JGS1, JGS2, and JGS3 grades, tailored for industries requiring precise performance under demanding conditions.

Conclusion

Choosing the right quartz tube material — whether GE214, JGS1, JGS2, or JGS3 — can significantly impact the performance, purity, and efficiency of your optical fiber or high-temperature process. Understanding their unique characteristics ensures the best fit for your technical requirements and budget.

At M-Kube Enterprise LLC, we supply premium Quartz Tubes in the USA, designed for optical fiber production, thermocouple protection, and high-temperature furnaces. Our products are available in custom sizes, purity levels, and pressure ratings to meet your precise needs.

Looking for Quartz Glass Tubing in the USA for your next project?
Contact M-Kube Enterprise LLCtoday for custom quartz tube solutions that meet your exact specifications.

Call us at +1-732-808-1999 or
Email: info@mkubeenterprise.com  to get a personalized quote and technical assistance from our experts

FAQs

What is the main difference between GE214 and JGS1 quartz?

Both are synthetic fused silica materials, but GE214 is produced by GE with tighter impurity control and slightly better UV transmission, while JGS1 offers comparable performance at a more accessible cost.

Which quartz tube is best for high-temperature furnace applications?

GE214 and JGS2 quartz tubes are ideal for quartz tube furnace systems due to their excellent thermal shock resistance and ability to withstand prolonged high-temperature exposure.

Are JGS2 and JGS3 quartz suitable for optical fiber production?

Not ideally. Optical fiber production requires ultra-high purity materials like GE214 or JGS1, as JGS2 and JGS3 may contain trace impurities affecting optical clarity.

What are the common quartz tube sizes available in the USA?

Quartz tube suppliers typically offer standard diameters from 5 mm to 200 mm with wall thicknesses ranging from 0.5 mm to 10 mm, depending on the application.

How much does a high-temperature quartz tube cost?

Quartz tube prices vary depending on grade, size, and purity — typically ranging from $10 to $200 per unit for standard laboratory or furnace applications.


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