Quartz Glass picture
 
Home / Products / Technical Glass / Quartz Glass

Quartz Glass, UV-Grade Fused Silica

Synthetic quartz glass with high ultraviolet transmittance

Special Properties

  • Low coefficient of thermal expansion
  • Enormous operating temperature range
  • UV-quality glass
    (Outstanding ultraviolet light transmittance)
  • Very good temperature shock resistance
  • High purity glass
  • Low fluorescence
  • High chemical resistance
  • Completely free of soda

Typical Applications

  • UV-transparent optics
  • High temperature windows
  • UV-measurement technology
  • Glass substrates for thin film coatings
  • Optical windows for ultraviolet applications
  • Optics for space technology
  • Semiconductor applications
  • Cover slips & microscope slides with high ultraviolet permeability

What is synthetic quartz glass and what can it do?

Fused Silica (SiO2) is a synthetic molten, high purity, amorphous, non-crystalline quartz glass with exceptional properties. The material is made by melting very pure raw materials and is used for applications, that require Fused Silica windowa very good thermal strength or an excellent transparency for wavelengths below the visible spectrum. Because quartz glass offers a remarkable transmissivity of ultraviolet wavelengths, it is often used for UV-applications. This very high UV-light transparency cannot be outperformed by any other industrial glass material. Due to its low coefficient of thermal expansion, quartz glass shows a very good thermal shock resistance. The excellent thermal properties enable fused silica to hold up very strong thermal loads and allow a very high operating temperature. Hence, the glass is often used for the fabrication of heat resistant windows, that must withstand high temperatures of up to 1000 °C without melting or breaking. Likewise, the superb chemical stability of quartz glass is one of the best. It is exceedingly resistant against saline solutions, acids and water and the high chemical durability of quartz glass against bases is top class. It is much better than most other glass materials can provide. Particularly the high temperature resistance and the high grade of purity, make quartz glass a perfect material for various semiconductor applications.

From raw glass blocks to quartz glass optics

Our quartz glass components are fabricated out of large non-crystalline glass blocks, called "boules". This pure raw fused silica material is ground, polished, shaped and surface finished according to customer's specifications, until finally any kind of optics have emerged from the raw glass block. If required, our UV-grade quartz glass can be selected for a low content of inclusions and/or a high refractive index homogeneity and purity. We are processing many different available quartz, fused silica or fused quartz raw glass materials with different properties from nearly any well-known raw glass supplier worldwide and we make all kinds of optics out of these different material grades.


In order to request a quotation for quartz glass slides, windows or polished substrates at custom dimensions, please use the button below. Please choose UV-grade for a transmission of >80% at 185nm. Choose sight glass grade for applications where ultraviolet transmittance and optical properties are of secondary concern or if you want to use quartz glass due to its thermal properties only:


Quotation for UV-grade quartz glass

48h- Express Service icon


48-h Express Service partially available
(0,3mm ; 0,5mm ; 1mm ; 2mm ; 3mm tk. only)

 

Quotation for sight glass quality quartz

48h- Express Service icon


48-h Express Service partially available
(1mm ; 2mm ; 3mm tk. only)

 

Specifications & Properties


Transmittance of fused silica

Typical transmittance of fused silica

Optical Transmission

  • T > 80% at 185nm (only UV-grade glass)
  • Transmissivity of non-UV-grade materials on request

Refractive Index

  • nd = 1,45846

Density

  • 2,20 g/cm3

Homogeneity

Inclusion Classes

Average Coefficient of Thermal Expansion

  • approximately 0,57 x 10-6/K

Thermal Properties

  • Softening point approximately 1585 °C
  • Annealing point approximately 1042 °C
  • Strain point approximately 893 °C

Further further detailed specifications such as electrical properties, mechanical strength, impurities, index homogeneity, further technical properties etc for the different grades of the quartz glass and fused silica materials, please use our request form.


All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on technical specifications"