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A fused quartz plate — also known as a fused silica plate — is manufactured by melting high-purity natural quartz (SiO₂ ≥ 99.99%) or synthetic silica at temperatures exceeding 1700 °C, then forming it into flat, optically uniform substrates. Unlike ordinary glass or borosilicate glass, fused quartz exhibits an extraordinarily low coefficient of thermal expansion (0.55 × 10⁻⁶/°C), negligible birefringence, and exceptional transmission across a broad spectral range — from deep ultraviolet (170 nm) through the visible spectrum to near-infrared (2500 nm). These properties make fused quartz plates the material of choice wherever high-transmittance optical performance must coexist with thermal stability, chemical inertness, and dimensional precision.
Achieves over 93% transmittance from 200 nm (deep UV) to 2500 nm (NIR), enabling use in UV lithography, laser optics, fluorescence microscopy, and solar simulation systems without chromatic distortion.
With a service temperature up to 1200 °C and near-zero thermal expansion, fused quartz plates maintain optical flatness and dimensional integrity under rapid thermal cycling — critical in semiconductor diffusion furnaces and high-power laser systems.
Highly resistant to acids, alkalis, and oxidizing environments. Radiation-hardened grades withstand UV, X-ray, and gamma irradiation without solarization, making them ideal for space optics, synchrotron beamlines, and nuclear instrumentation.
Precision-lapped and polished to surface flatness of λ/10 or better, with surface roughness Ra < 0.5 nm. Custom dimensions, edge profiles, and anti-reflection coatings are available to meet stringent system integration requirements.
Fused quartz's high resistivity (10¹⁸ Ω·cm) and low dielectric loss make these plates ideal insulators in high-frequency RF environments, plasma chambers, and microwave optical windows.
Available in standard and custom sizes, thicknesses from 0.5 mm to 50 mm, with options for beveling, drilling, coating, and bonding. OEM and ODM services support rapid prototyping and high-volume production.
The global demand for high-transmittance fused quartz plates is accelerating, driven by converging megatrends in semiconductor scaling, renewable energy expansion, advanced photonics, and precision instrumentation. Understanding these dynamics is essential for procurement engineers, R&D managers, and system integrators selecting optical substrate materials.
As semiconductor nodes shrink below 3 nm, extreme ultraviolet (EUV) and deep ultraviolet (DUV) lithography systems demand fused quartz optical elements with sub-nanometer surface quality and ultra-low OH content. Leading fabs in Taiwan, South Korea, and the US are driving record procurement volumes of high-purity fused silica plates for reticle stages, beam-steering optics, and illumination systems.
Perovskite tandem solar cells and concentrated photovoltaic (CPV) systems require optically transparent, thermally stable substrates for cell encapsulation and light management. Fused quartz plates' high solar transmittance and resistance to UV-induced degradation position them as the preferred substrate material as the photovoltaic industry targets >30% cell efficiencies.
The emerging quantum computing and quantum communication industry relies on fused quartz waveguides, beam splitters, and phase retarders for photonic quantum circuits. The material's low autofluorescence, excellent UV transparency, and compatibility with femtosecond laser writing processes make it the substrate of choice for integrated quantum optical chips.
Autonomous vehicle LiDAR systems operating at 905 nm and 1550 nm wavelengths require protective optical windows with high NIR transmittance, scratch resistance, and thermal stability. Fused quartz plates are increasingly specified for LiDAR window assemblies, replacing polycarbonate and standard glass in high-performance automotive sensing modules.
Flow cytometry, confocal microscopy, fluorescence spectroscopy, and DNA sequencing platforms demand UV-transparent optical windows and cuvette substrates. Fused quartz's biocompatibility, chemical inertness to biological reagents, and deep-UV transmission (down to 170 nm) make it indispensable in next-generation genomics and proteomics instrumentation.
Satellite imaging systems, space telescopes, and Earth observation payloads operating in harsh radiation environments require radiation-hardened fused quartz optical elements. The expanding commercial space sector — driven by LEO constellations and lunar exploration programs — is creating new demand for radiation-resistant fused silica plates with custom coatings.
In PECVD, LPCVD, and thermal oxidation furnaces, fused quartz plates serve as viewport windows, process chamber liners, and wafer support plates. Their ability to withstand corrosive process gases (HF, Cl₂, HCl) at temperatures up to 1200 °C while maintaining optical clarity for in-situ process monitoring is unmatched by any competing material.
Fused quartz plates are used as laser entrance windows, output couplers, and beam-expanding optics in CO₂, Nd:YAG, excimer, and fiber laser systems. Their low absorption coefficient (<0.001 cm⁻¹ at 1064 nm) and high laser damage threshold (>10 J/cm²) prevent thermal lensing and catastrophic damage under continuous-wave and pulsed operation.
Industrial UV-C water treatment systems and air sterilization reactors use fused quartz plates as lamp envelopes and transmission windows. Their >90% transmittance at 254 nm — the germicidal UV wavelength — combined with resistance to ozone and chemical cleaning agents, makes them the standard material for high-throughput UV disinfection infrastructure.
From atomic absorption spectrometers to Raman spectroscopy systems and FTIR spectrometers, fused quartz optical plates and cuvette windows define the measurement accuracy of analytical instruments. Their negligible autofluorescence, precise refractive index (n = 1.4585 at 589 nm), and broad spectral window enable quantitative measurements from the vacuum UV to mid-infrared.
Lianyungang Southeast Quartz Products Co., Ltd., established in 2015, is located in Donghai County, Lianyungang City, Jiangsu Province — a national base for silicon material industry. As a professional manufacturer integrating R&D, design, production, sales and import & export trade, the company relies on the superior high-quality quartz ore resources in Donghai County, deeply engages in the deep processing of quartz glass, and has become a core supplier of quartz consumables for photovoltaic, semiconductor, laboratory, chemical, lighting and other industries with mature production technology, strict quality control system and complete customized services.
The company has standardized production workshops, advanced quartz processing equipment and a professional R&D team, with full-process production capacity from quartz raw material processing to finished product manufacturing. It can produce a full range of quartz products, including high-purity fused quartz tubes, quartz furnace tubes, quartz bell jars, quartz boats, quartz lamp holders, quartz crucibles, quartz instruments (beakers, condensers, distillers, etc.), and tri-acid purification equipment. All products are made of high-purity fused quartz raw materials, featuring excellent high-temperature resistance (up to 1200℃), thermal shock resistance, corrosion resistance, high light transmittance and good electrical insulation performance, which can meet the demanding working conditions such as vacuum environment, high-temperature sintering, atmosphere control and precision experiments.
Adhering to the philosophy of "Quality First, Customer Supreme, Innovation-Driven, Integrity Management", the company has established a complete quality inspection system. All products undergo multiple tests such as helium mass spectrometry leak detection, pressure resistance test and purity test before leaving the factory to ensure stable performance, no impurities and no leakage.
With reliable product quality, efficient delivery capacity and thoughtful after-sales service, the products not only cover all provinces and cities in China, but also are exported to many countries and regions in Europe, America, Southeast Asia, the Middle East, etc., winning wide recognition and trust from customers at home and abroad.
In the future, the company will continue to deeply cultivate the field of quartz products, continuously improve technological innovation and production technology levels, and strive to provide global customers with higher-quality and more professional quartz product solutions, contributing to the high-quality development of high-end manufacturing and scientific research fields. Our fused quartz plates for high-transmittance optical components are trusted by customers across Europe, America, Southeast Asia, the Middle East, and beyond — delivering consistent optical performance, reliable lead times, and full technical support from specification to installation.
From raw quartz ore selection through precision optical polishing, every stage of our fused quartz plate manufacturing is controlled to deliver consistent high-transmittance optical performance. Our ISO-aligned process includes raw material purity verification, electric arc fusion, annealing, precision cutting, lapping, polishing, and final optical inspection.
Tell us your wavelength range, dimensional tolerances, surface quality requirements, and production volume — our engineering team will respond within 24 hours with a tailored solution and competitive quote.
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