Nanotechnology Products and Applications

Product Details


Product: ZERODUR K20

Manufacturer: Schott

Product page: (external link)

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 850C.

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.

Key Applications

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