What information do you need to engineer a custom quartz tube or component?

Please send outer and inner diameter (or wall thickness), length, required tolerances, end configuration (open, closed, flanged, ground joint or welded fittings), material grade (transparent or opaque fused quartz), working temperature and atmosphere, annual or batch quantity, and a drawing in PDF, DWG or STEP format. Complete data lets our engineers confirm manufacturability and lead time in a single review.

What is the maximum operating temperature of fused quartz?

Transparent fused quartz typically supports continuous service around 1,100 °C and short exposures up to roughly 1,250 °C, with a softening point near 1,683 °C. Real limits depend on grade, load, atmosphere and cycle time. Above about 1,100 °C, surface contamination such as alkali residue from skin contact accelerates devitrification, so quartzware should be cleaned and handled with clean gloves before firing.

How does Southeast Quartz verify quality before shipment?

Products undergo helium mass-spectrometry leak detection, pressure resistance testing and purity testing before leaving the factory, together with dimensional inspection against the customer drawing, to ensure stable performance with no impurities and no leakage.

Can you manufacture oversized quartz tubes and non-standard quartz shapes?

Yes. Our workshop combines flame hot-working with CNC cold machining, so we produce oversized fused quartz tubes, bell jars, slotted quartz boats, flanged reactors, irregular shaped quartz sheets and fully customized quartz instruments according to customer equipment parameters.

Where is Southeast Quartz located and which markets do you export to?

Our factory is at No. 1 Qingsheng Rd., Qinghu Industrial Park, Donghai County, Jiangsu, China, within China's best-known crystal and quartz industrial cluster. Besides customers throughout China, we export to Europe, the Americas, Southeast Asia and the Middle East.

High-Quality High-Temperature Resistant Quartz Lamp Holders from China Suppliers - Reliable Factory for Industrial Use Supplier, Factories

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High-Quality High-Temperature Resistant Quartz Lamp Holders from China Suppliers - Reliable Factory for Industrial Use Supplier, Factories

Our high-purity quartz lamp holders are expertly crafted to withstand extreme temperatures, offering exceptional insulation and light transmittance. As a leading manufacturer in China, we supply high-quality components compatible with various light sources including halogen lamps and infrared heating lamps. These quartz lamp holders are designed to endure high-temperature radiation and current surges, making them essential components in lighting and heating equipment for stable operation.

We also provide quartz inner and outer lamp caps, crucial for UV lamps, infrared lamps, and halogen lamps. These components facilitate reliable electrical connections, effective sealing, and robust structural support.

The inner cap connects directly to the internal electrode or light-emitting structure, while the outer cap serves as the external component for electrical connections and mounting. Trust our factory's expertise to supply top-tier quartz solutions tailored to your lighting and heating needs.

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Product Description

📊 Key Performance Highlights

Softening Point 1780°C

Compressive Strength 1100 MPa

Young's Modulus 72,000 MPa

Mohs Hardness 5.5 – 6.5

Max Long-Term Temp 1100°C

🔬 Full Mechanical & Physical Specifications

Mechanical Behavior	Standard Values
⚖ Density	2.2 g/cm³
💪 Compressive Strength	1100 MPa
📐 Flexural Strength	67 MPa
↔ Poisson's Ratio	0.14 ~ 0.17
📏 Young's Modulus	72,000 MPa
🔩 Modulus of Rigidity	31,000 MPa
💎 Mohs Hardness	5.5 ~ 6.5
🌡 Transformation Point	1280°C
🔥 Softening Point	1780°C
❄ Annealing Point	1250°C
♨ Specific Heat (20 ~ 350°C)	670 J/kg·°C
🌀 Thermal Conductivity (20°C)	1.4 W/m·°C
🔭 Index of Refraction	1.4585
📉 Low Thermal Expansion Coefficient	5.5 × 10⁻⁷ cm/cm·°C
⚙ Thermal Processing Temperature	1750 ~ 2050°C
⏱ Short-Term Use Temperature	1300°C
🕐 Long-Term Use Temperature	1100°C
🧪 Material	Silicon Dioxide (Natural Quartz)
🎨 Color	Transparent or Colorless
✨ Surface	No Air Bubble, No Line
🧱 Strain	1270°C Fused Quartz Glass Brick
🔎 PPM Grade	Controlled 10 / 20 / 100 PPM
⭕ Shape	Circle
📦 Thickness	2 mm – 20 mm

❓ Frequently Asked Questions

Q What is the maximum operating temperature for fused quartz glass?

Fused quartz glass can withstand a short-term use temperature of up to 1300°C and a long-term continuous use temperature of up to 1100°C. Its softening point is as high as 1780°C, making it one of the most thermally stable optical materials available.

Q What makes fused quartz glass different from ordinary glass?

Unlike ordinary glass, fused quartz is made from pure Silicon Dioxide (SiO₂) derived from natural quartz. It offers an exceptionally low thermal expansion coefficient (5.5 × 10⁻⁷ cm/cm·°C), extremely high purity (down to 10 PPM), and superior thermal and mechanical performance that standard glass cannot match.

Q What thickness options are available for fused quartz glass?

Fused quartz glass is available in a thickness range of 2 mm to 20 mm. Custom thicknesses within this range can be produced depending on the specific application requirements, such as optical windows, semiconductor processing, or high-temperature furnace components.

Q What PPM purity grades are available?

Our fused quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM. Higher purity grades (lower PPM) are typically selected for semiconductor manufacturing, laboratory instruments, and precision optical applications where contamination control is critical.

Q Why does fused quartz glass have such a low thermal expansion coefficient?

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C is a direct result of the amorphous, highly cross-linked SiO₂ network structure. This property makes fused quartz highly resistant to thermal shock — it can be heated to high temperatures and quenched in water without cracking, unlike most other glass types.

Q Is fused quartz glass suitable for optical applications?

Yes. With an index of refraction of 1.4585 and a transparent, colorless surface free of air bubbles and lines, fused quartz glass delivers excellent optical clarity. It transmits a broad spectrum of light including UV, visible, and near-infrared wavelengths, making it ideal for lenses, windows, prisms, and laser optics.

High-Quality High-Temperature Resistant Quartz Lamp Holders from China Suppliers - Reliable Factory for Industrial Use Supplier, Factories

Product Description

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