These lower material grades are typically used for high-temperature applications where only sight glass quality is needed. As purity and deep UV transparency are of secondary importance in such use cases, this more economical material is often the best choice for such components. Although fused quartz is only suitable for less demanding applications, it has an almost identical coefficient of expansion, a similar heat resistance, and the same interesting thermal properties as the higher-grade materials. It also offers excellent chemical resistance and better UV-light transparency than most other glasses. Furthermore, it is capable of high infrared transmission and has the same crystal-clear appearance as optical quartz.

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The enormous temperature range and thermal endurance of quartz glass are unparalleled. It can operate continuously up to 1000 °C and is highly resistant to thermal shock due to its very low coefficient of thermal expansion. As well, the chemical properties of quartz glass are remarkable. Its chemical resistance to acids exceeds that of almost all other glass types. It is durable and exceptionally resistant to salt solutions, alkalis, and water.

Fused silica

Due to its excellent electrical properties, quartz glass is also ideal for solutions in semiconductor technology. Because currents can only flow through mobile ionic impurities that are marginally present in quartz glass, it offers exceptionally high electrical insulation, which is essential for the fabrication of many electronic devices and semiconductors.

In addition to the optical grade quartz glass described above, we also process a less sophisticated quartz type called fused quartz. Although this product is also commonly called quartz glass, it is clearly different as it is made by melting natural quartz crystals. As a result, it contains far more impurities and can't offer the homogeneity or outstanding optical performance of fused silica.

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We manufacture custom optics for the UV, visible, and infrared wavelength ranges, primarily from large quartz blocks called boules. We can select the raw glass for low inclusions and bubbles. In addition, an index homogeneity of up to ≤ 0.5 ppm is available if this is a critical requirement for an application. Cutting the raw glass from the boule is the first step in the production of a quartz glass optic. After this process, the material is shaped, finely ground, and polished according to the specific surface requirements. In this way, our company produces UV-transparent substrate glasses, glass wafers, microscope slides, high-quality custom optics, and many other quartz glass products daily.

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Portable Digital Angle Gauge with Magnetic Base.

To request a quotation for windows, substrates, glass plates, or other optical quartz glass parts with individual dimensions, please select a thickness from the table or use the button below.

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Our company processes raw materials from leading manufacturers in the quartz glass industry (Corning, Heraeus, Tosoh, SCHOTT, Saint-Gobain Quartz, Shin-Etsu, GE Quartz, and many others). More detailed properties, datasheets, and information on all glass qualities we process are available on request.

As high-purity fused silica is a block glass, there are usually no off-the-shelf standard thicknesses available. Hence, it must be individually specified and manufactured. However, we continuously grind and polish to different thicknesses and tolerances to offer our customers the best possible availability and short lead times. You can even order these with individual dimensions and take advantage of our 48-hour express production. Click below to start an inquiry:

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Optical quartz glass is a synthetic, high-purity fused silica produced by a flame hydrolysis melting process. The crystal-clear amorphous material contains virtually no impurities, consisting only of silicon and oxygen (silicon dioxide). This unique type of quartz glass provides over 80% UV light transmission at a wavelength of 185 nm.

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Fused quartz is typically used for the fabrication of high-temperature sight glasses, lamp housings, UV lighting or disinfection systems, clear furnace glasses, pressure-resistant windows, and other quartz glass components. For further details, specifications, and properties, please refer to our fused quartz datasheet. Please also look at the Quartz Glass FAQ page for help in selecting the right quartz glass material for your application.

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