Q5: What is the temperature resistance limit of quartz glass?
A:
4. How Purity & Hydroxyl Affect Temperature Resistance
- High OH quartz (>800ppm): Long-term temperature drops 30–50°C, prone to devitrification above 1100°C
- Medium OH electric-melt quartz (100–300ppm): Balanced cost and heat resistance, standard 1100°C long-term limit
- Ultra-low OH synthetic quartz (≤10ppm): Stable at 1200°C long-term, little performance loss after hundreds of thermal cycles Excess metal impurities like sodium and aluminum will also accelerate surface crystallization at high heat and lower the usable temperature ceiling.
5. JGS Grade Temperature Parameter Reference
- JGS1 Far UV Synthetic Quartz: Long-term 1150–1200°C, short peak 1400°C, for UV lithography & semiconductor high-temp windows
- JGS2 UV-VIS Synthetic Quartz: Long-term 1100–1150°C, short peak 1350°C, for lab furnace sight glass & precision thermal instruments
- JGS3 Infrared Electric-Melt Quartz: Long-term 1100°C, short peak 1300°C, for infrared heating equipment
6. Practical Usage Tips
- Vacuum working environment: Reduce long-term allowable temperature by 50–100°C to avoid silica volatilization
- Avoid direct contact with molten alkali metal above 900°C, chemical corrosion will shorten service life
- Slow cooling (≤5°C/min) after high-temperature operation to prevent thermal shock cracks
- What is your MOQ for custom optical glass and display glass parts?
Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.
- Can I get free glass samples for testing before bulk order?
Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.
- What is the production lead time for custom optical glass components?
What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.
- Do you offer one-stop custom optical glass processing services?
Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.
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