ZERODUR® K20 with Keatite

ZERODUR® K20 Glass Ceramic

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.

This new glass ceramic material has an expansion coefficient of 2.0•10-6 K-1 between 20° - 700° C, and an even lower value of 1.5•10-6 K-1 at room temperature. The material has high temperature stability and does not change during multiple temperature cycles.

ZERODUR® K20 Benefits

ZERODUR® K20 glass ceramic has a near zero thermal expansion coefficient and long-term temperature stability up to 850°C. ZERODUR® K20 can be matched with low thermal expansion metal alloys such as Invar®.

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.
US patent granted, European patent pending

ZERODUR® K20 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

ZERODUR® K20 Forms of Supply

ZERODUR^® K20 glass ceramic can be supplied in the following forms:

Molds for glass slumping
Rods
Tubes
Discs
Plates
Complex customized CNC manufactured products
Serial production or prototype manufacturing

If you are interested in high precision optical components made of ZERODUR^® K20 glass ceramic, please check here about our options or contact us.

ZERODUR® K20 Specifications

ZERODUR^® K20 glass ceramic has an expansion coefficient of 2.0•10^-6 K^-1 between 20° - 700° C and 1.5•10^-6 K^-1 at room temperature. It is most appropriate for applications requiring material temperature stability up to 850°C.

Quality Assurance

Modern measurement equipment is used in the inspection of ZERODUR^® K20 glass ceramic parts during all stages of fabrication to ensure 100% control of geometrical shape and internal quality.

Related Information

ZERODUR^®
Coatings
Precision CNC machined parts

ZERODUR^® K20 - Product Flyer ZERODUR^® - Catalogue

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Advanced Optics
SCHOTT AG

Hattenbergstrasse 10
55122 Mainz
Germany

+49 (0)6131/66-1812

+49 (0)3641/2888-9047

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