Which glass and crystal materials can BY Photonics machine?

We machine JGS1 UV fused silica, JGS2 and JGS3 fused quartz, borosilicate glass, optical glass, optical color filter glass, infrared glass, samarium- and cerium-doped glass, sapphire, PTFE-based diffuse reflector material and laser ceramics.

What is the difference between JGS1, JGS2 and JGS3 quartz glass?

JGS1 is synthetic UV-grade fused silica with high transmission from about 185 nm. JGS2 is fused quartz for the visible range with good UV transmission from about 220 nm. JGS3 is infrared-grade fused quartz with low OH content that transmits up to about 3,500 nm.

Which drawing formats should I send for a custom part?

STEP, IGES, DWG, DXF or a dimensioned PDF are all accepted. Please include material, quantity, critical tolerances, surface quality, coating and the operating environment of the part.

How quickly will I receive engineering feedback?

Our engineers review complete drawings and return a manufacturability assessment within 24 hours on working days.

Do you support prototypes and export shipping?

Yes. We support prototype and low-volume orders as well as repeat batch production, and our components are shipped to customers worldwide.

High-Quality Opaque Fused Quartz Plate Manufacturers & Factory

15+

Years Engineering Expertise (Est. 2010)

99.99%

SiO₂ Chemical Purity Benchmark

1,250°C

Continuous Operating Temperature

< 24h

Engineering Drawing Review Turnaround

Precision Semiconductor & Optical Components (Batch 01)

Explore high-temperature quartz components, laser cavities, and substrates fabricated via certified multi-axis CNC cold processing and oxyhydrogen flame welding.

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High-Quality Diffuse Reflectors Made of Spectralon‑Grade PTFE for Diode‑Pumping Chambers Manufacturer, Suppliers

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High-Quality Borosilicate Windows and Plates for Viewports Suppliers, Factory

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High-Quality Custom Quartz Glass Components for Vacuum Coating Supplier, Factories

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High-Quality Square Groove Quartz Substrate for Fiber Couplers Supplier, Factories

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Material Science Whitepaper

Engineering Fundamentals: Opaque Fused Quartz Mechanics

Understanding how uniform micro-bubble distribution transforms vitreous silica into the industry's ultimate thermal radiation shield and thermal insulator.

Micro-Porous Infrared Scattering

Unlike clear transparent fused silica (JGS1/JGS2/JGS3), opaque fused silica incorporates high-density, microscopic closed gaseous pores (10–50 µm). This micro-structure induces intense Mie scattering against incident infrared rays, cutting thermal transmission by up to 90% across the 1 µm to 5 µm spectrum.

Thermal Shock Immunity

With an extremely low coefficient of thermal expansion (CTE ≈ 5.5 × 10⁻⁷ /°C), our opaque quartz plates withstand instantaneous thermal gradients from 1,150°C furnace insertion to water quench without micro-fracturing, structural warping, or mechanical failure.

Corrosion & Plasma Inertness

Consisting of >99.99% SiO₂, opaque fused quartz exhibits almost absolute chemical resistance to mineral acids (except hydrofluoric and phosphoric at elevated temps). It serves as a dependable barrier against corrosive fluorinated etch plasmas and halogen atmospheres in CVD processes.

Supply Chain Superiority

Why Tier-1 Global Procurement Directs to China's Quartz Factories

Combining primary mineral reserves, advanced oxyhydrogen sintering technology, and integrated fabrication to deliver uncompromised precision at scale.

Upstream Mineral Access

Direct proximity to domestic ultra-pure crystalline quartz silica deposits guarantees continuous raw material availability, low trace element contamination (Al, Fe, Ti < 15 ppm cumulative), and shields supply lines from volatile spot price spikes.

Unified Hot & Cold Tooling

By housing continuous electric fusion furnaces, oxyhydrogen flame processing, 5-axis CNC ultrasonic grinding, and class 1,000 cleanroom cleaning under one roof in Tianjin, we eliminate sub-tier margins and prevent tolerance accumulation.

Sub-Millimeter DFM Agility

Our dedicated optical glass process engineers evaluate customized STEP/DXF/PDF technical drawings within 24 hours. We advise on chamfer stress relief, step-milling parameters, and optimal bubble-density selection to optimize cost per yield.

Total Lot Traceability

Every opaque quartz batch undergoes strict dimensional verification via coordinate measuring machines (CMM), surface roughness profilometry (Ra < 0.4 µm lapped), and GD&T validation, accompanied by standard material analysis certificates.

Application Matrix

Mission-Critical Operating Scenarios & Industry Solutions

From 300 mm wafer thermal processes to heavy-load induction metallurgy, discover where opaque fused quartz delivers decisive functional reliability.

Industrial Sector	Specific Component Application	Operational Environment	Decisive Value Deliverable
Semiconductor Fabrication	Vertical Diffusion & LPCVD Thermal Baffles, Heat Flanges, Pedestals	1,050°C – 1,200°C; Vacuum; SiH₄, NH₃, Cl₂ gases	Eliminates radiative axial thermal loss; keeps heating zone uniform without wafer metallic contamination.
Solar / Photovoltaic PV	TOPCon / PERC Tube Furnace Insulation Plates, End Plugs	Continuous thermal cycling 800°C – 1,150°C; POCl₃ atmosphere	High mechanical load endurance; cuts furnace power consumption by up to 22% via infrared reflection.
Optical Fiber Draw Towers	Furnace Insulation Discs, Bottom Muffler Heat Shields	Over 1,900°C proximity heating, ultra-pure Argon/Helium sweep	Resists vitrification breakdown; zero volatile outgassing protects pristine preform optical claddings.
High-Temp Metallurgy	Induction Sintering Viewport Shields, Crucible Thermal Base Plates	Rapid RF induction pulses; 1,300°C shock gradients	Dielectric integrity prevents RF eddy current heating while protecting sensitive optical sensor pyrometers.

Technical Specification Reference

Material Characteristics & Machining Limits

Quantitative benchmarks comparing standard high-purity clear fused quartz against our specialized opaque fused silica plate grades.

Property Parameter	Standard Opaque Fused Quartz Plate	High-Purity Clear Quartz (JGS2 Reference)	Testing Protocol
SiO₂ Purity Level	≥ 99.99 %	≥ 99.995 %	ICP-OES Spectrometry
Apparent Bulk Density	2.06 – 2.18 g/cm³	2.20 g/cm³	Archimedes Immersion Method
Continuous Max Temperature	1,150 °C	1,100 °C	Atmospheric Furnace Chamber
Short-Term Softening Point	1,680 °C	1,650 – 1,710 °C	Dilatometer Thermal Analysis
Thermal Conductivity (at 20°C)	0.75 – 0.95 W/(m·K)	1.38 W/(m·K)	Transient Plane Source (TPS)
Infrared (IR) Attenuation	> 85% diffuse scattering (1–4 µm)	< 8% absorption (high transmittance)	FTIR Spectrophotometer
CNC Machining Tolerance Limits	Thickness ±0.05 mm; OD/ID ±0.03 mm	Thickness ±0.02 mm; OD/ID ±0.02 mm	High-Precision CMM Metrology

Technical Procurement FAQ

Engineering Questions & Direct Answers (FAQ)

Real-world insights directly addressing tolerances, outgassing, customization, and logistical validation for prospective buyers.

What primarily differentiates opaque fused quartz from clear fused silica?

Opaque fused quartz is engineered with internal, microscopic gaseous inclusions that diffuse and reflect radiant thermal heat. While clear quartz transmits over 90% of visible and near-infrared energy, opaque quartz blocks and scatters radiant IR, making it superior for thermal barriers, heat shields, and insulation baffles.

Can opaque quartz plates be CNC-machined with complex holes, steps, and chamfers?

Yes. Utilizing 5-axis ultrasonic CNC diamond machining centers, we perform complex hole drilling, blind pockets, edge chamfering, and O-ring groove milling. Strict spindle speeds and dedicated tooling ensure internal bubble pores do not cause micro-edge chipping or compromise structural margins.

Does the micro-porous structure cause outgassing issues in high-vacuum CVD tools?

No. Our opaque fused silica consists of completely sealed, closed-cell micro-pores sintered under controlled thermal conditions. There are no interconnected capillary channels to trap air or cleaning moisture. Following our standard vacuum bake-out protocol, our plates perform reliably in low-pressure semiconductor applications (down to 10⁻⁶ Torr).

What surface finishes are available for opaque fused quartz plates?

We supply plates in as-sintered raw format, precision diamond-ground matte finish (Ra 1.6–3.2 µm), high-flatness lapped finish (Ra 0.4–0.8 µm), or flame-glazed/fire-polished finish where maximum particle sealing and minimal surface generation are needed.

What maximum diameter and thickness plates can BY Photonics fabricate?

We cast and machine opaque quartz discs and plates from miniature sizes (10 mm) up to 800 mm in diameter, with thickness configurations ranging from 2.0 mm to over 60 mm. Custom oversized rectangular furnace baffles can also be tailored to client equipment drawings.

How do you safeguard fragile, large-aspect quartz plates during air and ocean transport?

Each component undergoes class 10,000 cleanroom cleaning, individual vacuum hermetic sealing in anti-static PE barrier bags, custom high-density shock-absorbing EPE closed-cell framing, and export-grade fumigated wooden crating engineered to exceed ISTA drop and vibration standards.

Comprehensive Catalog Integration