Schott Nextrema® Glass Ceramic

Glass-ceramics are distinguished from glass and ceramics by their characteristic manufacturing process and by their properties. Not classifiable as glass or as ceramic, they represent a completely new class of materials.  Glass-ceramic, such as SCHOTT ROBAX® or SCHOTT NEXTREMA®, is recommended for applications that require extreme temperature environments.  The material proprieties of each are unique and correspond to the specific product design requirements or application. Cincinnati Gasket & Industrial Glass is a SCHOTT ROBAX® and SCHOTT NEXTREMA® glass ceramic supplier.

SCHOTT ROBAX® fire-viewing panels provide fireplace manufacturers the temperature stability, transparency, heat transmission and thermal shock resistance for safety and protection from fire hazards, while providing warm heat.

SCHOTT NEXTREMA® glass-ceramic combines the benefits of technical specialty glass with the properties of high temperature materials to provide a unique solution for technical applications and new product development (see SCHOTT NEXTREMA® glass-ceramic brochure).

Main product characteristics include:

  • Near-zero thermal expansion
  • High thermal shock resistance
  • High chemical resistance
  • Wide transmittance spectrum (visible light and IR range)
  • Process inert
  • Robust at high temperatures (up to 1,742 °F short term)
  • Surface resistance
  • Gas Impermeability

Many industries using glass-ceramic include:

  • Display manufacturers
  • Solar panel manufacturers
  • Food processing
  • Automotive manufacturers
  • Outdoor heaters
  • Commercial ovens
  • Heat insulators
  • BBQ grill manufacturers
  • Fireplace manufacturers

Various NEXTREMA® applications & uses:

  • Furnace viewing/insulation
  • Infrared heating elements (e.g. spas, grills)
  • Soldering
  • CFRP manufacturing
  • Coating & Sputtering
  • Facade cladding


  • NEXTREMA® Opaque White
  • NEXTREMA® Opaque Grey
  • NEXTREMA® Transparent
  • NEXTREMA® Tinted
  • NEXTREMA® Translucent White
  • NEXTREMA® Translucent Bluegrey