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 Fused Silica Quartz Plate – Heat Resistant Supplier, Factories

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Custom Fused Silica Quartz Plate – Heat Resistant Supplier, Factories

Quartz sheets are made from high-purity quartz material and have the characteristics of high temperature resistance, high light transmittance, and low coefficient of expansion. They can be customized in size and thickness and are widely used in optical windows, semiconductor manufacturing processes, laboratory glassware and other fields. They are key components of optoelectronic and scientific research equipment.

A quartz plate is a flat sheet made from high-purity silicon dioxide (SiO₂), also known as fused quartz plate or quartz glass plate. It is produced by melting natural or synthetic high-purity quartz and then cutting and polishing it into flat panels.

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Product Description

Product Specifications

Square Quartz Plate Round Quartz Discs

Length × Width (mm)	Dimensional Tolerances (mm)	Standard Thickness (mm)	Thickness Tolerances (mm)
10 × 10	±0.1	0.5 / 1.0 / 2.0	±0.05 ～ ±0.1
20 × 20	±0.1	0.5 / 1.0 / 2.0 / 3.0	±0.05 ～ ±0.1
30 × 30	±0.1	1.0 / 2.0 / 3.0	±0.05 ～ ±0.1
40 × 40	±0.1 ～ ±0.2	1.0 / 2.0 / 3.0 / 4.0	±0.08 ～ ±0.1
50 × 50	±0.1 ～ ±0.2	1.0 / 2.0 / 3.0 / 5.0	±0.08 ～ ±0.1
60 × 60	±0.2	2.0 / 3.0 / 5.0	±0.1
80 × 80	±0.2	2.0 / 3.0 / 5.0	±0.1
100 × 100	±0.2 ～ ±0.3	2.0 / 3.0 / 5.0	±0.1
150 × 150	±0.3	3.0 / 5.0	±0.1 ～ ±0.2
200 × 200	±0.3 ～ ±0.5	3.0 / 5.0	±0.1 ～ ±0.2

Custom dimensions and custom tolerance requirements are available upon request.

Diameter Φ (mm)	Diameter Tolerances (mm)	Standard Thickness (mm)	Thickness Tolerances (mm)
10	±0.1	0.5 / 1.0	±0.05
20	±0.1	0.5 / 1.0 / 2.0	±0.05
25	±0.1	0.5 / 1.0 / 2.0	±0.05
50	±0.1 ～ ±0.2	1.0 / 2.0 / 3.0	±0.05 ～ ±0.1
70	±0.2	1.0 / 2.0 / 3.0	±0.1
80	±0.2	2.0 / 3.0	±0.1
100	±0.2 ～ ±0.3	2.0 / 3.0 / 5.0	±0.1
150	±0.3	3.0 / 5.0	±0.1 ～ ±0.2
200	±0.3 ～ ±0.5	3.0 / 5.0	±0.1 ～ ±0.2

Edge grinding, beveling, and fine optical polishing options available upon inquiry.

Frequently Asked Questions

What are the standard dimensional tolerances for quartz plates and discs?

Dimensional tolerances depend on size. Smaller components (10 mm to 30 mm) feature tight tolerances of ±0.1 mm, while medium-sized units (40 mm to 80 mm) range from ±0.1 mm to ±0.2 mm. Larger plates and discs up to 200 mm carry tolerances between ±0.3 mm and ±0.5 mm.

What standard thickness options are available?

Standard thickness profiles include 0.5 mm, 1.0 mm, 2.0 mm, 3.0 mm, 4.0 mm, and 5.0 mm. Thickness precision ranges from ±0.05 mm for thinner profiles up to ±0.2 mm for thicker substrates.

What is the primary difference between square plates and round discs in application?

Round quartz discs are most commonly integrated into sight glasses, circular viewports, pressure windows, and optical lens fixtures. Square quartz plates are widely utilized in semiconductor carriers, substrate bases, thermal furnace viewing panels, and laboratory slide assemblies.

How do quartz components handle thermal shock and high operating temperatures?

Quartz material offers an extremely low coefficient of thermal expansion, providing outstanding resistance to thermal shock. It can withstand continuous operating temperatures up to 1100°C and short-term peak exposures up to 1300°C without compromising structural integrity.

Can these components be fabricated to custom dimensional tolerances?

Yes, beyond the standard dimensions listed in the specification tables, tailored fabrication with custom lengths, diameters, step designs, hole drillings, and tighter precision tolerances is fully supported.

Custom Fused Silica Quartz Plate – Heat Resistant Supplier, Factories

Product Description

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