Product Sector: Transportation → Automotive → Engine/Drive Systems
The new ZERODUR K20 glass ceramic material contains a crystal phase of over 90% Keatite, produced by thermal transformation from the semi-transparent ZERODUR glass ceramic material.
ZERODUR is an inorganic, non-porous glass ceramic, characterized by a phase of evenly distributed nanocrystals within a residual glass phase. ZERODUR contains about 70-78 weight percent crystalline phase with a high quartz structure. This crystalline phase has a negative linear thermal expansion, while that of the glass phase is positive. The crystals have an average size of about 50 nm.
ZERODUR K20 glass ceramic has a near zero thermal expansion coefficient and long-term temperature stability up to 850°C.
Other advantages of ZERODUR K20 glass ceramic include:
* Optical inspection of the excellent homogeneity and internal quality can be done in the semi transparent base material before transformation.
* After transformation the material has a radiance factor of more than 90% with a matt brilliant white finish.
* ZERODUR K20 is free of pores and can be polished to very low surface roughness levels.
* Large-scale parts can be produced with dimensions of several meters.
ZERODUR K20 glass ceramic is the ideal material for:
* Mechanical and optical components within high energy laser systems
* Mold material in hot forming processes (glass, plastic etc.)
* Ceramic engine components
* Calibration standards for optical and mechanical probes