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.

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 Heat Resistant Quartz Lamp Holder: High-Quality Industrial Solutions from China Suppliers and Factory Manufacturer, Product

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High-Quality Heat Resistant Quartz Lamp Holder: High-Quality Industrial Solutions from China Suppliers and Factory Manufacturer, Product

Q: 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.

Our quartz lamp holders, manufactured from high-purity quartz glass in China, are designed to withstand extreme temperatures while providing excellent insulation and light transmittance. These lamp holders are compatible with various light sources, including halogen and infrared heating lamps. They can endure high-temperature radiation and current surges, making them an essential component in lighting and heating equipment. By ensuring the stable operation of your light source, our products stand out among suppliers in the industry.

The quartz inner and outer lamp caps are critical parts of quartz lamps, commonly used in UV lamps, infrared lamps, and halogen lamps. They serve crucial functions for electrical connection, sealing, and structural support. Our factory produces these components with precision and quality to meet diverse application needs.

Inner cap: offers connection to the internal electrode or light-emitting structure.

Outer cap: provides the external connection and support for mounting.

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Product Description

⚙ Mechanical & Physical Properties

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 of 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, making it suitable for high-temperature industrial applications.

Q What makes fused quartz glass thermally stable?

Fused quartz glass has an extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C, which minimizes dimensional changes under thermal stress and provides exceptional resistance to thermal shock.

Q What is the base material of this quartz glass product?

The product is made from Silicon Dioxide (SiO₂) sourced from natural quartz. It is transparent or colorless in appearance, with a surface free from air bubbles and lines, ensuring high optical clarity.

Q What thickness options are available for quartz glass?

The quartz glass is available in thicknesses ranging from 2 mm to 20 mm, with a circular shape to accommodate a wide range of industrial and optical applications.

Q What PPM purity grades are available?

The quartz glass is offered in controlled purity grades of 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate purity level based on their specific process requirements.

Q What is the compressive strength of fused quartz glass and why does it matter?

Fused quartz glass has a compressive strength of 1100 MPa, which is significantly higher than its flexural strength of 67 MPa. This means it performs best under compressive loads and should be handled carefully to avoid bending stresses that could cause fracture.

High-Quality Heat Resistant Quartz Lamp Holder: High-Quality Industrial Solutions from China Suppliers and Factory Manufacturer, Product

Product Description

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