Quartz glass is the basic material for the production of optical fiber because it has good UV transmission performance and very low absorption of visible light and near-infrared light. Besides the thermal expansion coefficient of quartz glass is extremely small. Its chemical stability is good, and the bubbles, stripes, uniformity and birefringence are comparable to those of ordinary optical glass. It is the best optical material under the harsh environment.

ZMSH uses only high quality, pure quartz glass in the manufacture of its infrared heaters. Quartz glass offers a number of important and critical benefits necessary for effective, efficient process heating:

  • high transmission of infrared radiation
  • high resistance to thermal shock
  • excellent high temperature properties
  • low thermal expansion
  • chemical purity
  • chemical resistance
  • low hysteresis (lag in response time)
  • Fused silicia thermal
  • The graph illustrates thermal data for fused silica (quartz glass). The red line represents change in length of a 1m long rod composed of transparent fused silica, as a function of temperature.
  • Maximum working temperature, continuous: 1100 °C
  • Maximum working temperature, short term: 1300 °C
  • Softening point: 1730 °C