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.

Custom Heat Resistant Quartz Lamp Holders for Industrial Use - High-Purity Glass from China Suppliers and Factory Supplier, Factories

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Custom Heat Resistant Quartz Lamp Holders for Industrial Use - High-Purity Glass from China Suppliers and Factory Supplier, Factories

Our quartz lamp holders, made from high-purity quartz glass, are designed to withstand extreme temperatures while providing excellent insulation and light transmittance. These durable holders are compatible with a variety of light sources, including halogen lamps and infrared heating lamps. As a core component of lighting and heating equipment, our quartz lamp holders ensure stable operation, even under high-temperature radiation and current surges.

Available from reliable China suppliers, our quartz inner and outer lamp caps serve as the essential end components for various types of quartz lamps, such as UV lamps, infrared lamps, and halogen lamps. These components play a crucial role in electrical connection, sealing, and providing structural support.

The inner cap connects directly to the internal electrode or light-emitting structure, while the outer cap functions as the external part for electrical connections and mounting. Sourced from a reputable factory, our quartz lamp components guarantee quality and efficiency for your lighting solutions.

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Product Description

Product 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

What is the maximum continuous use temperature of fused quartz glass?

Fused quartz glass can withstand a long-term continuous use temperature of up to 1100 °C, while short-term peak applications can reach 1300 °C, making it suitable for high-temperature industrial environments.

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

Fused quartz is made from pure Silicon Dioxide (SiO₂) with a highly disordered amorphous structure. This results in an exceptionally low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C, providing outstanding thermal shock resistance compared to conventional glass.

What PPM purity grades are available for fused quartz glass?

Our fused quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate level of trace element content for semiconductor, optical, or industrial applications.

What thickness options are available for fused quartz glass?

Fused quartz glass is available in a thickness range of 2 mm to 20 mm in circular shapes, accommodating a wide variety of engineering and optical requirements.

How does the compressive strength of fused quartz compare to its flexural strength?

Fused quartz glass exhibits a very high compressive strength of 1100 MPa, while its flexural (bending) strength is 67 MPa. Like most glass materials, it performs significantly better under compression than under tensile or bending loads.

Is fused quartz glass optically transparent?

Yes. Fused quartz glass is fully transparent and colorless, with an index of refraction of 1.4585. Its surface is manufactured with no air bubbles and no lines, ensuring excellent optical clarity for precision applications.

Custom Heat Resistant Quartz Lamp Holders for Industrial Use - High-Purity Glass from China Suppliers and Factory Supplier, Factories

Product Description

Product Specifications

Frequently Asked Questions

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