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 High-Quality Heat Resistant Quartz Lamp Holders from China Suppliers - Industrial Use Factory Components Suppliers, Product

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Wholesale High-Quality Heat Resistant Quartz Lamp Holders from China Suppliers - Industrial Use Factory Components Suppliers, Product

Quartz lamp holders manufactured in China are crafted from high-purity quartz glass, offering exceptional resistance to high temperatures, excellent insulation, and superior light transmittance. These holders are designed to be compatible with various light sources, including halogen lamps and infrared heating lamps. Capable of enduring high-temperature radiation and current surges, they serve as essential components in lighting and heating equipment, ensuring the stable operation of your light sources, At our factory, we provide both inner and outer quartz lamp caps, which are critical components of quartz lamps such as UV lamps, infrared lamps, and halogen lamps. The inner cap connects directly to the internal electrode or light-emitting structure, while the outer cap serves as the external part for electrical connection and mounting, As reliable suppliers of quartz lamp holders and caps, we ensure that our products meet the highest quality standards, making them ideal for various industrial applications

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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 material is used in this quartz glass product?

The product is made from Silicon Dioxide (Natural Quartz), offering exceptional purity, transparency, and colorless appearance. The surface is free of air bubbles and lines, ensuring high optical and structural quality.

Q What is the maximum operating temperature for long-term and short-term use?

For long-term continuous use, the maximum recommended temperature is 1100 °C. For short-term applications, the material can withstand temperatures up to 1300 °C. Thermal processing is carried out between 1750 °C and 2050 °C.

Q What thickness options are available for this quartz glass?

The quartz glass is available in circular shapes with thickness ranging from 2 mm to 20 mm, making it suitable for a wide variety of industrial and scientific applications.

Q What does PPM grade mean and what options are available?

PPM (Parts Per Million) grade refers to the level of impurity control in the quartz material. This product is available in three controlled purity levels: 10 PPM, 20 PPM, and 100 PPM, allowing customers to select the appropriate grade for their application requirements.

Q Why is the low thermal expansion coefficient important for quartz glass?

The extremely low thermal expansion coefficient of 5.5 × 10⁻⁷ cm/cm·°C means the material expands or contracts very minimally with temperature changes. This property makes quartz glass highly resistant to thermal shock, ensuring dimensional stability and durability in high-temperature environments.

Q What are the key mechanical strength properties of this quartz glass?

This quartz glass features a compressive strength of 1100 MPa and a Young's modulus of 72,000 MPa, indicating excellent stiffness and resistance to deformation under load. Its Mohs hardness of 5.5–6.5 ensures reliable scratch resistance for most industrial environments.

Wholesale High-Quality Heat Resistant Quartz Lamp Holders from China Suppliers - Industrial Use Factory Components Suppliers, Product

Product Description

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