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 the minimum order quantity for custom precision optical glass components?
FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.
- 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?
A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.
- Are your optical glass products ISO, CE and RoHS certified?
All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.
- Do you offer one-stop custom optical glass processing services?
Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.
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