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.

Wholesale Heat Resistant Quartz Lamp Holder for Industrial Use - China Suppliers and Factory Direct Products Manufacturers, Factories

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Wholesale Heat Resistant Quartz Lamp Holder for Industrial Use - China Suppliers and Factory Direct Products Manufacturers, Factories

Quartz lamp holders are crafted from high-purity quartz glass, renowned for its ability to withstand high temperatures while providing excellent insulation and light transmittance. These lamp holders are ideal for use with various light sources, including halogen lamps and infrared heating lamps. With superior resistance to high-temperature radiation and current surges, they serve as a vital component in lighting and heating equipment, ensuring the stable operation of the light source, In addition, quartz inner and outer lamp caps are essential elements in the design of quartz lamps, such as UV lamps, infrared lamps, and halogen lamps. These caps play a crucial role in electrical connection, sealing, and providing structural support, - Inner cap: This component connects directly to the internal electrode or light-emitting structure, - Outer cap: Serving as the external part, it facilitates electrical connection and mounting, As a leading supplier and factory in China, we take pride in delivering high-quality quartz lamp holders and caps that meet industry standards, ensuring reliability and performance for all lighting applications

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Product Description

Technical Specifications

Mechanical & Physical Properties	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 material is this quartz glass made from?

This quartz glass is made from Silicon Dioxide (Natural Quartz), offering a transparent or colorless appearance with no air bubbles or lines on the surface, ensuring high optical clarity and structural integrity.

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

For short-term use, the maximum operating temperature is 1300 °C. For long-term continuous use, it is rated up to 1100 °C. The softening point is 1780 °C, making it suitable for high-temperature industrial applications.

Q What thickness options are available for this quartz glass?

The quartz glass is available in thicknesses ranging from 2 mm to 20 mm, and it comes in a circular shape. This wide range of thickness options allows it to be adapted for various precision and industrial applications.

Q What is the thermal expansion coefficient of this quartz glass?

The quartz glass has an extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C. This very low value means the material experiences minimal dimensional change with temperature fluctuations, making it ideal for precision optical and thermal applications.

Q What PPM purity grades are available?

The quartz glass is available in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM. These controlled purity levels ensure the material meets the stringent requirements of semiconductor, optical, and high-tech manufacturing industries.

Q What is the compressive strength and hardness of this quartz glass?

This quartz glass has a compressive strength of 1100 MPa and a Mohs hardness rating of 5.5 to 6.5, indicating excellent resistance to mechanical stress and surface scratching. Combined with a Young's Modulus of 72,000 MPa, it provides outstanding structural rigidity for demanding applications.

Wholesale Heat Resistant Quartz Lamp Holder for Industrial Use - China Suppliers and Factory Direct Products Manufacturers, Factories

Product Description

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