fused silica properties

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fused silica properties

You have not agreed to all cookies, which limits the use of the website and performance. The most common impurities are metals (such as Al, Na and Fe among others), water (present as OH groups) and chlorine.

This value changes little over a wide range of frequencies. This causes the material to slightly oxygen deficient, which helps to restrain devitrification.The high resistance of quartz glass to elements and compounds is another advantage for high-end applications.

These additional ingredients modify the optical and mechanical characteristics of the glass and lower the melt temperature of the mix. These contaminants not only affect the viscosity, optical absorption and electrical properties of the quartz glass. Devitrification is also restrained by the neutral/ reducing atmosphere used during melting. A number of unique optical, mechanical and thermal properties have made quartz glass an indispensable material in the fabrication of high-tech products.

doping materials.The intrinsic UV and IR absorption edges in silica glass are located at roughly 0.180 and 3.5 microns wavelengths, respectively. Purity is mostly determined by the raw material, the manufacturing method and subsequent handling procedures. These factors have to be considered thoroughly when comparing the strengths of different “brands” of quartz glass. The average CTE value for quartz glass at about 5.0 × 10 It is possible to rapidly quench thin particles of quartz glass from over 1000 °C by plunging them into cold water without breakage. The theoretical tensile strength of silica glass is greater than 1 million psi.

Depending on the exact experimental conditions, such as the wavelength, energy density and peak intensities in pulsed laser applications, various kinds of damage can occur to the glass.

This glass is composed exclusively of high-purity silica (SiO2) in amorphous (non-crystalline) form. It is only attacked by hydrofluoric and phosphoric acid. Quartz glass is sensitive to all alkali and alkaline-earth compounds because even slight traces of them hasten devitrification at high temperatures. The finished product is a transparent glass with an ultra-high purity and improved optical transmission. In this interview, AZoM speaks to Yannick Galais, General Manager of Luxinar, about Luxinar's laser technology and how it is used in the automotive industry.In this interview, AZoM talks to Christine Desplat, an R&D engineer at Master Bond Inc., about the testing Master Bond does to discover an epoxy's resistance to bases.In this interview, AZoM talks to Dr. Robert Keighley, senior staff scientist at SHIMADZU, about spectrophotometer, and the capabilities of the next-generation models available on the market.Discover the new entry-level particle size and Zeta analyzer from Malvern Panalytical, which has enhanced capabilities to improve data quality and results.Photonic Science’s back-reflection Laue system allows real-time crystal orientation down to 0.1 degrees accuracy.The CB15S digester is perfect to use in the preparation of smaller sample sizes up to 5 g.We use cookies to enhance your experience.

Typical Fused Silica Uses: High temperature lamp envelopes: Temperature insensitive optical component supports Besides transmission ranges can be customized to meet your application by adding e.g. Besides transmission ranges can be customized to meet your application by adding e.g. 29 Jan 2020 To be able to use our website to its full extent, please agree to all cookies. By continuing to browse this site you agree to our use of cookies.

Fused silica is an amorphous grade of silica known for its low thermal expansion and … Special precautions must be taken at all stages of manufacture to maintain high purity. The hydroxyl level can be so high because the silica particles that result from the hydrolysis reaction are extremely fine and therefore have tremendous surface area capable of absorbing moisture present in the flame.The main attributes of electrically fused materials are the low hydroxyl content and reduced devitrification rates.

Transmission can be influenced by material purity and the method of manufacture.

For example, machined surfaces tend to be weaker than fire polished ones. The low hydroxyl content increases infrared transparency and viscosity. However, it is important to realize that the thermal shock resistance depends on factors other than CTE such as surface condition (which defines strength) and geometry. Similarly, if the number of pieces in service increases, so does the chance of experience a failure. 13 Aug 2020 The optical properties of fused silica offer striking opportunities for research and industry: the broad transparent transmission range covers the complete visible spectrum and extends far into the infrared and ultraviolet regions. Because of stress concentration on surface flaws, failure most always occurs in tension rather than compression.In other words: „reliablility depends on the chance“.This could also be stated as the probability that the piece will experience a mechanical stress greater than the strength of any existing flaws. Fused silica is a good electrical insulator, retaining high resistivity at elevated temperatures and excellent high-frequency characteristics.

The various types of fused silica and fused quartz have nearly identical CTE’s and thus can be joined together with no added risk of thermally induced breakage.

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fused silica properties

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