The units presented on these websites are included in our standard program and are partially available from stock. Along with the units described, we also produce intermediate sizes and special units according to your drawings and specifications, units for the semiconductor industry as well as diffusion trays, caps, push rods etc.

QGT quartz glass units and apparatuses are produced from one of the most valuable materials that industry and research have available. Quartz glass is melted from pure, crystalline quartz, meaning from the purest possible silicon dioxide. The fields of application are: laboratories, industry, research and the semiconductor industry. Quartz glass offers special advantages with respect to its thermal behaviour due to extremely low expansion, high transformation and softening pint temperature, the best possible elasticity and thermal shock resistance, low heat conductivity, low electrical conductivity, low dielectric loss, excellent transmittance form the ultra-violet to infrared spectral range.

Quartz glass is exceptionally resistant to water, acids, saline solutions and other aggressive substances. It is only attacked by hydrofluoric acids. Quartz glass reacts sensitively to alkali and alkaline-earth compounds, because, already with only a trace, these promote devitrification at temperatures above 900°C. consequently, fingerprints and water spots should be removed by means of alcohol or demineralised water before heating. After that, the units should not be touched by your bare hands again.

· Hydrolytic stability according to
  DIN 12111
1st Hydrolysis class:
Base release       mg Na₂O
                             2g grit

· Acid resistance according
to DIN 12116
1st Acid class:
Weight loss < 0,1 mg/dm
Surface

· Alkali resistance according to DIN 52322
1st Alkali class:
Weight loss approx. 50 mg/dm
Surface

· Chemical purity
Foreign elements in quartz glass
— in weight ppm —